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Thelypodium stenopetalum
Also called Slender Petal Mustard, Slender Petal Thelypodium, Slender Petaled Mustard, Slender Petaled Thelypodium
Slenderpetal thelypody is a rare, federally endangered biennial mustard found only in a few moist mountain meadows near Big Bear Lake in southern California. It is a wild species that is not commonly grown in gardens, so care notes are for reference.
Thelypodium stenopetalum is a rare species of flowering plant in the mustard family known by the common names slenderpetal thelypody, slender-petaled thelypodium and slender-petaled mustard. It is endemic to the San Bernardino Mountains of southern California, where it is known from only three or four extant occurrences in moist mountain meadows near Big Bear Lake. Its remaining habitat is considered seriously threatened and the plant is a federally listed endangered species in the United States.
This plant is threatened by the destruction of its very limited mountain meadow habitat, which is being claimed for development and degraded by recreation, grazing, and introduced weedy plants. Changes in hydrology and soil quality impact the plant. Much of its historical habitat is thought to have disappeared when the Big Bear Dam was built over a century ago, expanding Big Bear Lake by flooding adjacent land.
Text excerpted from the Wikipedia article Thelypodium stenopetalum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
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.
