Alligator Weed

by Green Deane

in Edible Raw, Greens/Pot Herb, Plants, Salad

 Alternanthera philoxeroides: Exotic Munch

Alligator Weed or Alternanthera philoxeroides

Alligator Weed or Alternanthera philoxeroides

If you have alligators you have alligator weed. That’s a little odd because alligator weed is a native of South America where there are no alligators. But now Alligator Weed is found in the same waters as alligators, and many other places as well.

Introduced into the United States around 1894, it is an invasive weed in many states. It’s also a little-known edible thought it is in the amaranth clan. One place it is eaten a lot is Burma but it does come with a warning.

One PhD expert says raw it tastes better than many salad greens and some in a salad is fine. In other words, when green it can be a garnish or a salad addition. Another says more than 100 grams dry weight ( 3.5 oz dry, which probably translates into a half a pound or more wet weight) might provide too much calcium oxalate, a bad dose. The point is don’t dry it and eat 3.5 ounces of it. Some raw in your salad is fine. Also cooking can reduce the calcium oxalate in greenery.

The botanical name, Alternanthera philoxeroides, means “alternate flower like the philoxerus.” It is said alter-NANTH-er-uh fil-oh-zer-OY-deez, or Alter-ann-THER-rah fie-lox-er-OH-deez. And indeed it does resemble the philoxerus but that is now called the Blutaparon vermiculare, which only grows near salt water. The A. philoxeroides can tolerate some brackish water.

There are many Alternanthera in warmer area so key out the plant carefully. A. philoseroides is the most common. Four known edibles are A. ficoidea, A sessilis, A. sissoo, and A. versicolor.  A. sessilis is well-distributed in the U.S., A. ficoieda is rare.  A. versicolor is found in Asia. A sissoo is a common green in South America but must be cooked.

Green Deane’s “Itemized” Plant Profile


“A. philoxeroides: A perennial herb; stems creeping or floating, ascending towards apex, rooting at the lower nodes, branched, hollow, with a longitudinal hairy groove on 2 opposite sides.  Leaves subsessile or with petiole to 5 mm long, with a ring of white hairs between the 2 opposite leaf bases.  Lamina 3-13 x 1-3.5 cm, elliptic to oblanceolate or obovate, glabrous or slightly hairy near the attenuate base; apex obtuse or acute.  Inflorescences in upper axils, mostly 1-2 cm in diameter, capitate, white; pedicles to 9 cm long with 2 opposite longitudinal hairy grooves, occasionally heads shortly pedunculate and terminal.  Bracts 2.5-3.5 mm long, ovate-acuminate; bracteoles similar to bracts, somewhat smaller, persistent.  Tepals 5-7 mm long, oblong to ovate, acute or obtuse.  Fertile stamens 5; staminodes = stamens.  Style short, thick; stigma capitate.”  (Webb et al, 1988; p. 101).

Time Of  Year

Nearly year round


In fresh water, or on damp land, can also tolerate some brackish water.

Method Of Preparation

Leaves in small amounts raw, also as a cooked green.

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{ 9 comments… read them below or add one }

JoyForager December 22, 2016 at 11:32

Is A. braziliana and other ornamentals of that genus edible? Thanks


Green Deane December 23, 2016 at 03:41

I don’t see it listed as edible.


Ryan Monaghan April 14, 2016 at 17:13

Claims from the National Institute of Health that it could be a promising treatment for Dengue Fever as well.


Ashley February 25, 2015 at 10:09

There is a new study that found that the calcium in alligator weed actually contains much less oxalates than many other green leafy vegetables. As a result, the calcium in this plant is more bio-available. Additionally, cooking did not significantly affect this bioavailability. Good Stuff!


Ashley February 25, 2015 at 10:09
Susan Scherr April 1, 2014 at 21:15

Would this do well at the edge of a brackish water lake in zone 10?


Green Deane April 1, 2014 at 21:46

It is usually found only in fresh water.


larry February 21, 2013 at 17:42

love your videos and this website. can you tell me what are some books you would recommend for me to get .i love wild plants and i eat some already but i would like to know more about them.p.s. do you ever come to louisiana to do classes or anything. thanks


Green Deane February 26, 2013 at 08:36

I’ll be getting close to Louisiana with classes in Pensacola this year. Books… there is one call Edible Plants of the Gulf South by Charles Allen. No drawings worth mentioning, nor indepth descriptions. But it is in one place a compilation of edible plants in your area. That and photos off the internet should help a lot.


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