Crassula aquatica is a succulent plant known by the common names water pygmyweed, common pygmyweed and just pigmyweed. It is an annual plant of salt marshes, vernal pools, wetlands, and other fresh to brackish water bodies. It is at least partially aquatic, living in areas which are submersed much of the time. It also lives along muddy banks and in tidally-active areas of estuaries.
Crassula aquatica is a small plant forming thin mats or small patches on mud and sand, and growing more erect when exposed to open air for longer periods. The flesh of the plant is greenish-yellow to bright red or purplish. The tiny fleshy pointed leaves are only a few millimeters long.
A flower grows on a short stalk from the intersection of each oppositely-arranged pair of leaves. The flower is only about two millimeters long and wide. The fruit is a minute follicle containing several seeds. This plant is widespread across North America and Eurasia.
- An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 2: 206. (http://plants.usda.gov/java/largeImage?imageID=tiaq2_001_avd.tif) Author Britton, N.L., and A. Brown
- "USDA Plants Profile: Crassula aquatica".
- "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
- "Nine Species Protected Under the Province's Endangered Species Act". Government of Newfoundland and Labrador. April 29, 2015.
- http://nmnh.typepad.com/the_plant_press/2014/03/more-than-a-pygmy-discovery.html%7Cpublisher=Allen, Cavan, and Wesley Knapp. 2014. More Than a ‘Pygmy’ Discovery. Plant Press Vol. 17 (Number1)
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- Jepson Manual Treatment - Crassula aquatica
- USDA Plants Profile: Crassula aquatica
- Crassula aquatica - U.C. Photo gallery
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