Sea Lettuce, Ulva lactuca

Ulva: Sea Soup & Salad

Ulva is the greenest seaweed you will ever see from shore, or in the sea for that matter.

Ten species, all edible, are found around the world in cool water. Ulva (ULL-vah, rhymes with hull) is commonly found on intertidal rocks, in tide pools, on reef flats, growing on shells, piling, pieces of wood, other seaweed or free-floating. It also favors areas of fresh water runoff that are rich in nutrients (particularly nitrogen) such as the mouths of rivers, streams and run-off pipes (the latter not the wisest place to harvest food.)  Ulva can grow profusely in those areas and it is one of the most commonly encountered seaweeds. Here in Florida it is most often seen on jetties at low tide.  In fact, there has been a decades long breeding program in the state to develop a variety that can be commercially grown in warmer waters.

Despite looking flimsy Ulva is quite strong for leaves only two cells thick. Think if it as wet wax paper with some resistance. Despite that it can easily be harvested, in or out of the water. Its most common use is to add it to soups and salads. Nutritionally Ulva has 87 mg of iron per 100 gram portion and 700 mg calcium per 100 gram serving. U. lactuca is made of 15% protein, 50% sugar and starch, less than 1% fat. It is also high in protein, iodine, aluminum, manganese and nickel and contains Vitamin A, Vitamin B1, Vitamin C, sodium, potassium, magnesium, calcium, soluble nitrogen, phosphorous, chloride, silicon, rubidium, strontium, barium, radium, cobalt, boron, trace elements, ash, fiber and the kitchen sink…

Ulva intestinalis, also edible.

Commonly called Sea Lettuce or Green Laver, it can also used as a substitute for nori (see Porphyra) a seaweed used in sushi. Ulva should be washed well then use or as an option soak it in water for two hours before using to moderate the flavor. Besides soups and salads it can even be toasted over charcoal. When toasted it add yet another flavor to soups and salads. Ulva can be store for two or three days in the refrigerator or frozen for six months without loss of flavor.  Further Ulva can be dried and used as a powder. When its blades (leafs) are dried they darken and are brittle. It should be air-dried or pressed into thin sheets. Drying in the sun is best though you can also use an oven. And in the end, if you don’t like it, Ulva can be used as animal fodder.  Personally, I like it.  A restaurant in Port Canaveral, Florida, used to serve Ulva fresh in a “seaweed salad” that was quite good. One combination for a seaweed salad is Ulva lactuca, Ulva enteromorpha and Ulva monostroma, known collectively as aonori. In texture and flavor Ulva reminds me of shreaded jelly fish… I know that’s not much of a help but I find it tasty. Ulva is also dried, salted and sold in South America as “cachiyugo.”

The most famous species is Ulva lactuca. In Latin Ulva means “sedge.” In this case Ulva was one of the first plants to get a scientific name and Ulva was used in the sense to mean a swamp grass. As it resembled wild lettuce it got the name given to lettuce, lactuca, which means milk bearing. Wild lettuce on land has a white sap. Generally Ulva is called Sea Lettuce.  Avoid any seaweed, Ulva or otherwise, that has blue-green algae on it.

Sea Lettuce Soup

4 cups chicken stock

2 sheets Ulva

2 eggs

Salt and pepper

½ tsp sesame oil

1 or 2 green scallions

Bring stock to a boil.  Add sea lettuce and

stir.  When sea lettuce is soft, stir in well-

beaten eggs and boil for a few seconds then

remove from heat.   Add salt and pepper to

taste.   Add sesame oil, garnish with onion,

and serve.

Toasted Sea Lettuce

6 sheets Ulva

½ tsp Salt

1 ½ tablespoon sesame oil

Mix salt and sesame oil and rub a thin coat on sea lettuce.  Lay 6 sheets on top of one another, roll them up and let them marinade for 5 minutes.  Unroll and cook each sheet separately in a hot pan over low heat until crisp. Cut sheet into smaller pieces and serve with hot rice.

 Green Deane’s “Itemized” Plant Profile

IDENTIFICATION: Thin, sheet-like, as tufts or solitary blades, shape varies, to one three feet. Blades (leaves) ruffled or flat, small microscopic teeth on edges.  Bright green to dark green, gold edges when reproducing. In some species the blades have holes in them.

TIME OF YEAR: Generally year round.

ENVIRONMENT: Ulva lives attached when young to rocks in the middle to low intertidal zone, and as deep as 35 feet in calm, protected waters. Usually seen in dense colony. It is often offers a hiding place for blue crabs. Older it is free-floating.

METHOD OF PREPARATION: Raw or cooked, in salads or soups, chopped as a relish, a late ingredient to stir fries. Can be dried and added as a power to other foods. Or, chop it up, boil for a half an hour, mix with grated cheese and oatmeal, form into patties and fry. Sea Lettuce fritters. The blades can also be used as a wrap, raw or cooked or for cooking, such as wrapping one around a shrimp before frying.  Ulva can be microwaved on low power for three or so minutes.

 HERB BLURB

Ulva has been used to treat burns and gout. It is a natural source of iodine and is an astringent.

 

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Ripe Chickasaw Plums, locally in May and June. Photo by Green Deane

 Chickasaw Plum: First Springtime Blossom

Every spring, three wild plums put on a show locally: The Chickasaw, the Flatwood, and the American. They burst out in white blossoms and no leaves.

Five petals and many stamen

When in naked bloom they look similar but that’s where the resemblance stops. The Chickasaw and the American go on to produce consistently edible plums whereas the Flatwood’s fruit can range from extremely bitter to sweet. Telling these plums apart before they fruit is a bit of a guessing game.

If you have skinny leaves it is either the Chickasaw or Flatwood. If the tips of the teeth on the leaves have yellow or red glands (you’ll need a hand lens) it is the Chickasaw, otherwise the Flatwood. If you have fat leaves with a strong pointed tip, it’s the American though it is not common here. Locally the fruit of the Chickasaw (Prunus angustifolia) ripens to a sweet red in the spring and is gone by early July. It often forms a thicket.

In spring the tree is all white flowers and no leaves

The Flatwood (Prunus umbellata) which often stands alone, ripens to black or yellow and can be around through the summer into the fall. The American (Prunus americana) tends to fruit in late summer to early fall and has red fruit. The fruit of the Flatwood often remains amazingly bitter and hard even after months on the tree. Settlers used it to make jellies or fed it to livestock, hence its other common name, Hog Plum though there are several “hog” plums. Native Americans and settlers, however, regularly ate of the American and Chickasaw plums, the latter developing very sweet fruit with a tang. The first foragers used the plums fresh and dried for winter use. Some tribes took out the seed kernels, others didn’t. Let’s talk about that.

The skinny leave has a trough down the middle

Liberated from their shells the sunflower-sized kernels of these plums can create cyanide in your gut. Very small amounts don’t bother us but we are not talking about small amounts. Natives would make cakes out of the kernel mash. Letting the cakes set for a day or so allowed enzymes to work on those chemicals as did subsequent cooking, making the cake edible… or at least that is the explanation experts give. That strikes me as a lot of work for such a small amount of food that’s potentially toxic.  That said they could have been a treat, a flavoring, an essential macro nutriment — oil — to make them worthwhile or a micro-nutriment. Calories are not the only reason to forage.

In the 1800’s there was great interest in making cultivars out of native plums and by 1901 there were over 300 of them. But mechanization of fruit production in the early 1900’s led growers away from the native varieties though there has been some interest of late to use the native plums again as a high-value specialty crop.

The tips of the teeth will be either red or yellow if a Chickasaw Plum. Photo by Green Deane

The tips of the teeth will be either red or yellow if a Chickasaw Plum. Photo by Green Deane

Besides man the Chickasaw Plum’s fruit is eaten by deer, bear, fox and raccoon. The thorny thicket is valuable for songbird and game bird nesting including the bobwhite and mockingbird. It also makes a good wind break and can be used for erosion control. The plum, extensively used, was taken everywhere by the Chickasaw Indians and it has many local names. While usable, the Flatwood Plum, is not prime foraging food. Its quality can vary from tree to tree, rarely rising to the gustatory level of the Chickasaw Plum. The American Plum was also used by the natives.

The Chickasaw Plum is one of my favorite trail and yard nibbles. As to its botanical name Prunus angustifolia. Prunus (PROO-nus ) is the Roman name for the plum.  Angustifolia (an-gus-tee-FOH-lee-uh) means skinny leaf (see photo directly above.) Umbellata (um-bell-LAY-ta) means like an umbrella for its shape. Americana (ah-mare-ree-KAY-na) means American.  “Chickasaw” is Choctaw for “old” and “reside” or as we might say in English, “the old place.” Incidentally, the Chickasaw Plum is native to Texas and Oklahoma but is naturalized through much of the United States where there are sufficient winter chill hours, such as central Florida north.

The Chickasaw plum and the American plum are closely related and hybridize easily. That means… yep, you guessed it. You can find plums in the wild which display some characteristics of each and can be impossible to identify.

 Green Deane’s “Itemized” Plant Profile

IDENTIFICATION: Chickasaw Plum: Small thorny tree to 25 feet, usually much smaller, flower small, under half an inch, 5 white petals, fragrant; reddish orange anthers, appear in clumps in early spring before the leaves, fruit bright yellow to red, round to oval, 1/3 to 1/2 inch in diameter, flesh juicy small plum, bark first smooth and reddish then with numerous elongated light horizontal hash marks. The leaf has a center troth. The teeth have yellow or red glands on the tip. Some times the fruit can stay green yet ripens to sweet.

TIME OF YEAR: Late spring in Florida, late summer farther north, usually around September. Locally the Chickasaw Plum is done fruiting long before the 4th of July. The Flatwood Plum can have fruit persisting into the fall.

ENVIRONMENT: The Chickasaw forms thickets in open areas, any open space in scrub forest, sandy soil, roadsides, fences, prairies, Pennsylvania west to the Rockies, south south to Central Florida, also California. Easily transplanted or grown from seed. It requires some chilling so won’t grow in South Florida and similar climates. The Flatwood is often a stand alone.

METHOD OF PREPARATION: Chickasaw: Cherry-size plum, out of hand or for jelly, pies, preserves and wine. It makes a tart, bright red jelly.  The Flatwood was used to make jellies or to add to other jellies. It is usually too sour and hard to eat out of hand.

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Wild mustards are easy to spot on our beaches. They are between the wrack line and the lift of the dune. (The root is unrelated debris.) Photo by Green Deane

The Cakile Clan: Seaside Edibles

Cakile edentula

Food is where the water is, be it fresh or salt, and one of the waterway foods of North America is Sea Rocket. There are at least five native Sea Rockets and one or two imports.

Cakile species are perennial that can grow upright or spread out. They grow close to the coast, often in dunes. Leaves are fleshy, the flowers are typically pale mauve to white, with four petals about a third of an inch in length. They are rather similar to those of the wild radish, that is, the petals have veins whereas mustards petals do not.  Identifying leaves and stems is the way to tell them apart. The leaves are also peppery and have a nose of mustard.

Cakile maritima

The most common is Cakile edentula (kah-KIL-ee e-DEN-tuh-luh.) It can be found from California to Alaska, Louisiana to Greenland and land boarding the Great Lakes. Florida has its own version, Cakile Lanceolate (lan-see-oh-LAY-tuh) that runs from Texas to Florida and Puerto Rico. C. maritima, from Europe, is found on the west coast, California to British Columbia, coastal Texas and Alabama, North Carolina to Long Island.   It is said muh-RIT-tim-muh, Latin, or mar-ih-TEE-muh, British. The point is, if you are near big water, there is a Sea Rocket near you and their ranges overlap. The goal is to learn your local variety or varieties. Not all of the Sea Rockets are used the same though they are similar. So let’s look at these three individually.

Cakile lanceolata

Cakile edentula: Leaves and young stems, raw or cooked. The younger leaves are used in salads, the older leaves are mixed with milder greens and used as a potherb. The flavor is similar to horseradish. The root can be dried and ground into powder. That can be mixed with flour and used to make bread. Said bread is a famine food.

Cakile maritima: (European Sea Rocket) Leaves, stems, flower buds and immature seed pods raw. They can be cooked but cooking makes them very bitter. However, they are rich in Vitamin C. Their root can also be dried and used.

Cakile lanceolata: (Southern Sea Rocket) Leave and steams eaten raw or cooked, has a mustard flavor. Young shoots or tips are excellent.  No report on the root and I haven’t tried it.  Leaves can have an ether taste but I have not encountered it.

Medicinally, boiled leaves have been used to clean persistent wounds.

Cakile is an old Arabic name for the plant. Edentula means without teeth, maritima, of the sea, and lanceolata, lance shaped. Sea Rocket comes from the rocket-shaped seed pods.

Green Deane’s “Itemized” Plant Profile

IDENTIFICATION: C. edentula, low, fleshy, branching beach plant with pale lavender flowers, not heavily toothed or not at all, found on the above the high-tide line of beaches, seed pods angular, succulent young stems and leaves  somewhat like horseradish.  C. maritima has very deeply lobed leaves, shiny, fleshy, green, tinted with purple or magenta, long-lobed, white to light purple flowers, sculpted, segmented, corky brown fruits to an inch long. C. lanceolata has long leaves that can be toothed or not or irregular but not deeply lobed. Pods cylindrical. Flowers white to light purple.

TIME OF YEAR: Mid spring to the autumn depending on climate.

ENVIRONMENT: Found on the above the high-tide line of beaches,  oceans, Great Lakes and local rivers.

METHOD OF PREPARATION: Leaves and stems of all raw, leaves and stems of the C. edentula and C. lanceolata can be cooked.   C. Maritima becomes very bitter when cooked. The root pounded and dried and mixed with flour and baked for a famine food.

 

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Sow Thistles can turn purple as they age. Photo by Green Deane

Sonchus: Sow Thistle, In A Pig’s Eye

Starting in  mid-January in Florida, later north of here, two of three local species of sow thistles invade my lawn in great number. They are so good they’re worth all the complaints about my untraditional lawn. I can’t eat them fast enough. In fact, right now I am having a bowl with homemade butter, salt and pepper. I threw a couple of plants that were a little too old into the pot but they weren’t too bitter. That bitterness is caused by their white sap.

You cannot eat most plants with white sap (or white berries.) That is one of the general rules of foraging for wild food, besides that and never eating anything wild without positive identification and verification it is edible. There are three or four common exceptions to the white sap rule: Figs, Ground Nuts, Sow thistles and various Wild Lettuce.

Typical Sonchus blossom

There’s a huge variety in sow thistles, from having few or no prickles to having a lot, from a foot high to six feet high, from green to purple, especially older plants. Young sow thistles can just be tossed in the herb pot, where as some older leaves need to be trimmed of the thistles, which is a point of culinary departure. Really old leaves are bitter and not that much fun to eat even if they are edible. Frankly if you have to trim spines off sow thistles you’re better off leaving them alone. Young and tender leaves is a good rule to follow particularly with the rougher species. When young their flavor resembles lettuce and as they age more like Swiss chard. When old they are just bitter. I try to harvest them between four and 12 inches high.  The young stalks peel and cooked are excellent, too. The young root is also edible when cooked but tends to be woody.

Sonchus asper leaf and stem

The three common ones are Sonchus oleraceus, (SON-kus oh-ler-AY-see-us ) Sonchus Asper (SON-kus ASS-pur) and Sonchus arvensis (SON-kus ar-VEN-sis.) They are respectfully the common sow thistle, the spiny sow thistle and the field sow thistle. The Oleraceus has green leaves with a bit of blue, Delta- arrow-shaped end lobes and distinctly pointed lobes where it clasps the stem. The asper has spiny round lobes where it clasps the stem. It also has a lot of spines. It’s the one that can require trimming. The arvensis has more lance shaped leaves, lobes can be irregular, and soft small spines. It is the softest of the three with a tactile feel closer to a wild lettuce.

Sonchus blossom as the insect sees it, photo by Bjørn Rørslett – NN/Nærfoto

As for the sow thistle’s botanical name: Sonchus is the ancient Greek name for the plant and means “hollow” referring to the plant’s hollow stem, a point of identification.  Although grazing animals (and butterflies) actually prefer the Sonchus to grass farmers rant about the plant because it’s a weed amongst their crop.  It is sad to say but a lot of agri-business is not green, or perhaps not so in the United States. In southern Italy Sonchus invades crops there but they have the good sense to pick it and serve it with spaghetti. Oleraceus means it is edible or cultivated.  Asper means rough, and arvensis of the cultivated field.

Sonchus oleraceus leaf and stem

Sow thistles got their name because they were fed to lactating pigs. (Remember the old heuristic way of thinking? If you want to see like a hawk eat hawk eyes. If you want mama pigs to nurse better feed them plants with white sap.)  Anyway, the white sap of the thistle was assumed to be good for nursing sows. As it turned out, pigs love them, as do rabbits which is why they are sometimes called Hare Thistles (they are not true thistles, however, which is another genus altogether. True thistles always draw blood their spines are so sharp. You can read about them here. )

As you can assume, sow thistle is found literally around the world. In Greece, it is used in winter salads, and has been for thousands of years. Pliny wrote that before Theseus went to meet the Bull of Marathon, he was treated by the old woman Hecale (e-KAH-lee in Greek) to a dish of sow thistles. The ancients Greeks considered sow thistle wholesome and strengthening — maybe the Bull of Marathon should have eaten some. Modern Greeks call it Zohos. In New Zealand, Sonchus is called “puha” and is frequently eaten, particularly by the Māori who also used the sap as a gum.  A very nice blog on the  Māori  and the Sonchus can be read here.

Again, young and tender is usually better when it comes to cooking wild greens. Here are some sow thistle recipes from ‘The Essential Hedgerow and Wayside Cookbook’. Incidentally, young Sonchus asper may seem prickly when raw but its soften when cooked (unless you picked them way to old.)

BUTTERED SOW-THISTLE

1 or 2 handfuls sow-thistle leaves – young

Butter or oil

Beef stock or water

Ground nutmeg – pinch

1 tsp. flour

Salt and pepper

 

For this recipe the young 2- to 4-inch leaves of common sow-thistle

[Sonchus oleraceus] are best and when the leaves are not bitter.

Other sow-thistle species may need their spines trimming off and

may be bitter to the taste requiring some preparatory boiling.

 

Heat some butter or oil in a pan and add the leaves. Stir thoroughly to

coat the leaves. Add a good slug of stock or water, reduce the heat to a

simmer and cover. Cook for about 5 to 10 minutes. Add a pinch of nutmeg,

the flour and some seasoning. Stir everything, then add another knob of

butter and melt into the sow-thistle over a low heat.

Serve.

 

STIR-FRIED SOW-THISTLE & PORK

½-1 cup pork meat – shredded / sliced

Light soy sauce

Corn flour – pinch

Water

White wine or dry sherry

Sugar – pinch

Salt and pepper

Sows thistles

 

Begin by slicing the meat into pieces about 2 inches long and 1/10th inch thick. Set aside. Next, make up a marinade from the remainder of the first group of ingredients, using a splash of soy sauce, slugs of water and wine, seasoning and pinches of corn flour and sugar. Mix together well in a bowl and then add the sliced meat. Stir thoroughly so that all the pieces are

coated and leave for 30 minutes. Heat some oil in a frying pan and fry the ginger for a couple of minutes, stirring to prevent burning, then add the spring onion. Stir for a minute, then add the meat. Stir-fry until the meat begins to cook. Add the sow-thistle leaves and continue frying for another 3 or 4 minutes, stirring to prevent burning and distribute the heat.

Green Deane’s “Itemized” Plant Profile

IDENTIFICATION: Plants have milky sap. S. Oleraceus tall with stemless lobed leaves that point past the stem. S. asper prickly-edged stem-less green leaves that wrap around the stem, dandelion-like blossoms more or less arranged in a flat top manner. S. arvenis similar to both but can be very tall.

TIME OF YEAR: In northern climates spring, summer and some times autumn, in the South December through April.

ENVIRONMENT: Lawns, fields, vacant lots, waste areas, parks

METHOD OF PREPARATION: Young leaves in salads, tend to be bitter, older leaves boiled for 10/15 minutes.

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Cereus blossom at night

Cereus blossom at night. Photo By Green Deane

Getting Down To Cereus Business

There are three things irritating about Cereus other than their spines: 1) several botanical names for the same plant; 2) which species do you exactly have, and 3) how you pronounce “Cereus.”

DNA testing may indeed be reducing crime but it is increasing cactuses, or at least changing their names. Many “cereus” are no longer cereus, among them C. undatus, C. pentagonus, C. robinii and C. keyensis, or as they are now known Hylocereus undatus, Acanthocerus tratragonus, Pilosocerus polygonus, and Pilosocereus robinii.  Do those name changes clear things up? … Thought so….

Cereus fruit in late summer, early fall. Photo by Green Deane

The last three are found only in southern Florida or the Keys and are endangered. Just know they are sprawling, usually three sided, and fruit’s pulp is edible raw if you are starving, just spread the seeds around. Also endangered in Florida is the C. eriophorus var. fragrans, C. gracilis var aboriginum, C. simpsonii and C. deeringii. The H. undatus  (aka C. triangularis & tricostatus)  is naturalized up to coastal central Florida and planted inland, such as at Mead Gardens. It is a commercial crop called “Dragon Fruit.” Also eaten is Cereus giganteus, known more famously by its common name, Saguaro Cactus. (Now that Cereus is called Carnegiea gigantea.)

The fruit of cactus are used in similar ways. The Saguaro Cactus is a good example. It was a staple of the Papago and Pima Indians. They harvested the fruit in July. The fruit can be eaten fresh or dried. When dry they can be pressed into cakes. The juice was used to make moonshine and the seeds ground into a buttery paste. The fruits are also eaten of the C. hexagonus, C., jamacaru, C. pernambucensis, and the C. peruvianus, the latter is perhaps the most common ornamentally grown cactus in the world, if it really exists at all, as a species. An explanation is required.

While many cactus are sold with the name C. peruvianus some people aren’t even sure it really exists as a species and might actually be one or two other species, or some hybrid. The Cereus above has nine spines where as most pictures show them with seven. One Cereus with nine spines is C. jamacaru, but its fruit is oblong and the one above is not. Tis a puzzle. Fortunately, all Cereus fruits are all edible so which one you have is academic (though practical as some have spines and other do not.)

Some Cereus are free standing, others climb trees. Photo By Green Deane

Some Cereus are free standing, others climb trees. Photo By Green Deane

The pronunciation of the genus is also something of a puzzle. You can find SEE-ree-us (like serious.) Or KEE-ree-us, and one British plant dictionary even has KAY-ree-us, which is surprisingly linguistically the most accurate. Most sources cheat and say it comes from Latin or Latin and Greek. But they stop there. The original base word was κερἰ (keri) said ke-REE and means wax (think candle as in the shape which is why some call them candlestick cactus.)  When the Romans took a Greek word beginning with a “K” they wrote it with a  “C” which then often gets mangled into an  “S” sound… KEE-ree to SEE-ree.  As the plant is shaped like a candle the genus was called Cereus, so you can call it “SEE-ree-us or KEE-ree-us depending upon your Latin or Greek temperament though it is usually said SEE-ree-us. (Also see “Catus, don’t be spineless.”)

Green Deane’s “Itemized” Plant Profile

IDENTIFICATION: Stems creeping, sprawling or clambering, branching profusely, or straight up to 30 feet or more, thick; tough with age, wavy. One to three spines on adult branches , .5 to three inces long, grayish brown to black, spreading; skin deep green. Flowers large, night blooming, scented; greenish yellow or whitish, rarely tinged rose. Fruit oblong to oval, two to four inches long, one to two inches thick, red with large bracteoles, pulp white, seeds black.

TIME OF YEAR: Bloom and fruits mainly in August and September

ENVIRONMENT: Can be found on the ground or growing on trees and walls and the like

METHOD OF PREPARATION: Ripe fruit is often chilled and cut in half so that the flesh can be eaten with a spoon. The juice makes a cool drink. A syrup from the whole fruit can be used to color pastries and candy. The unopened flower  bud can be cooked and eaten as a vegetable. The seeds can be eaten as is or ground up and used as flour. Fruits can also be made into preserves.  Pulp food value is water, 92.20; protein, 0.48-0.50; carbohydrates, 4.33-4.98; fat, 0.17-0.18; fiber, 1.12; ash, 1.10%.

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