Comprehensive Description
provided by North American Flora
Hamosa pertenuis (Greene) Rydb. Bull. Torrey Club 54:329. 1927.
Astragalus sp. Vasey & Rose, Contr. U. S. Nat. Herb. 1: 15. 1893.
Astragalus cedrosensis Vasey & Rose, Contr. U. S. Nat. Herb. 1: 15, as synonym. 1893.
Astragalus pertenuis Greene, Leaflets 2: 42. 1910.
Astragalus Nuttallianus cedrosensis M. E. Jones, Rev. Astrag. 270. 1923.
A slender annual; stem very slender, decumbent, 2-3 dm. long, branched at the base, sparingly strigose, terete; leaves 2-5 cm. long, ascending; stipules lanceolate or subulate, 1-2 mm. long; leaflets of the lower leaves 2-7, cuneate or obovate, retuse at the apex, 3-5 mm. long, those of the upper leaves oblong or linear, 5-10 mm. long, strigose beneath and usually glabrate above; peduncles 3-6 cm. long; racemes 1-3-flowered; bracts lanceolate, 1 mm. long;
* At the time of the Mexican Boundary Survey, there was a Frontera, Texas, near El Paso, and also a Fronteras, Sonora. On the type sheet the state is not given, but it is on a duplicate sheet as Sonora. calyx strigose, the tube about 1.5 mm. long, the teeth 1 mm. long; corolla tipped with purple, 4-5 mm long; pod arcuate, 10-12 mm. long, 2 mm. wide and thick, strigose, slightly sulcate on the lower suture.
Type locality: Cedros Island, Lower California. Distribution: Lower California.
- bibliographic citation
- Per Axel Rydberg. 1919. (ROSALES); FABACEAE; PSORALEAE. North American flora. vol 24(1). New York Botanical Garden, New York, NY