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Physaria pallida
Physaria pallida (syn. Lesquerella pallida) is a rare species of flowering plant in the mustard family known by the common name white bladderpod. It is endemic to Texas in the United States, where it is known only from San Augustine County. It is federally listed as an endangered species.
This plant was discovered in the 1830s but not seen again until its rediscovery in 1981. It has never been found outside of San Augustine County, Texas. There are six populations. The plant grows on openings in oak, hickory, and pine woods. It is limited to a part of the Piney Woods region on the Gulf Coastal Plain where there is alkaline soil derived from the Weches Formation. This geologic formation contains carbonates above a layer of water-impermeable glauconite, which keeps the soil above from draining, leaving the area quite moist. Most of the soils in eastern Texas are acidic, but the calcium and magnesium minerals in this formation make it alkaline. Other rare plants that occur on the Weches Formation include Sedum pulchellum, Calylophus drummondianus, Liatris mucronata, Paronychia virginica, Petalostemum pulcherrimum, Heliotropium tenellum, Eleocharis compressa, and Cuphea viscosissima.
Bladderpod · Avery Peak twinpod · Arctic Bladderpod · Front Range twinpod · Chambers' twinpod · Dudley Bluffs Bladderpod · Common twinpod · Fendler's Bladderpod · Missouri Bladderpod · Pointtip twinpod · Fremont Bladderpod · Globe Bladderpod
Text excerpted from the Wikipedia article Physaria pallida by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
