Comprehensive Description
provided by North American Flora
Cystium stramineum Rydberg, sp. now
An annual; stem 5 dm. high or more, densely silvery-silky, flexuose; leaves about 7 cm. long, ascending; stipules deltoid, 4 mm. long; leaflets 9-13, obovate, rounded or slightly retuse at the apex, 1-2 cm. long, 6-10 mm. wide, white-silky beneath, glabrous above; peduncles 5-7 cm. long; racemes 5-10 cm. long; bracts subulate, 2 mm. long; calyx silky, the tube 4 mm. long, the teeth subulate, 2 mm. long; corolla white, about 12 mm. long, similar to that of the preceding; pod mottled, sparingly short-pubescent, papery, rounded-ovoid, about 2 cm. long, nearly 1.5 cm. thick, somewhat sulcate on both sutures, short-acuminate, the tip upturned.
Type collected in southeastern Utah in 1870, E, Palmer (Torrey Herbarium).
- bibliographic citation
- Per Axel Rydberg. 1919. (ROSALES); FABACEAE; PSORALEAE. North American flora. vol 24(1). New York Botanical Garden, New York, NY
