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Cruciferae: Tropidocarpum capparideum

Before Imbibment

Jepson, W.L., 15349


Tropidocarpum capparideum Greene

Original Distribution

US, California, North western San Sacramento Valley, Near Mount Diablo


Alkaline soils, low hills, valleys <200m altitude

Extinction Data

IUCN = N/a, Jepson Flora Project - University of California = Presumed Extinct, Listed Extinct by WCMC 1996


Caper-fruited tropidocarpum, Stems + erect, 1.2-5 decimeter high, few branched above. Leaf 2-5 cm long. Flowers sepals yellowish, hairs sparse; petals 4-5 mm, obovate to spoon shaped, yellow, purplish tinged or not. Fruit pedicels spreading to ascending, straight to slightly upcurved, lower 1.5-2 cm; valves not or + keeled; hairs + 0 to few; style 1-2.6 mm.

Number of Specimens at Kew


Seed Data

16 Seeds sown at 20 C, 23 placed in storage conditions

Specimen Type (Y/N)


Kew Herbcat Barcode Number



Jepson, W.L.

Collector Number


Date Collected


Information Sources

Hickman, J.C. (ed.) (1993) The Jepson Manual, Higher plants of California. University of California Press. Berkeley. Walter, K.S. and Gillett, H.J. (eds) (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre IUCN The World Conservation Union, Gland, Switzerland and Cambridge, UK