Phaseolus parvulus Greene
Family: Fabaceae
Phaseolus parvulus image
Russ Kleinman  
Phaseolus parvulus is a viney pea with solitary or nearly solitary pink-purple flowers and lanceolate, trifoliate dark green leaves. There is a small, globose bulb just under the soil surface. Phaseolus parvulus is found in the understory of the upper elevation Ponderosa Pine Forest.
Kearney and Peebles 1969, McDougall 1973
Duration: Perennial Nativity: Native Lifeform: Vine General: Erect, slightly twining stems arising from a deep-seated, globose tuber, to 30 cm long, with bracts at the base of the pedicel only, not subtending the inflorescence. Leaves: Trifoliate, lanceolate leaflets, leaflets entire, to 1 cm wide or less, dark green above and lighter in color beneath, with a prominent midvein, glabrous or nearly so. Flowers: Purple, keels somewhat contorted, corollas 15-20 mm long; 1-2 flowers per peduncle in axillary racemes. Fruits: Flat, linear pods 2.5-3.5 cm long, glabrous to slightly pubescent, with 2-3 seeds. Ecology: Found in rich soils in coniferous forests from 6,500-8,000 ft (1829-2438 m); flowering August-September. Notes: The most obvious key to this species is the large, globose taproot; if you don't want to dig the plant up however, look to the mostly erect stems, the bracts which subtend the peduncle only and the pods 2.5-3.5 cm long. The pods are completely dehiscent, the two halves curling in a spiral. The seeds are round and somewhat large, as with all Phaseolus. Samples of this species show a highly variable leaf morphology, with some leaves becoming somewhat large and broadening in the middle with age. Ethnobotany: There is no specific use of this species recorded, but the seeds of the genus were used extensively as a food source. Synonyms: Alepidocalyx parvulus Editor: LCrumbacher, 2011 Etymology: Phaseolus comes from the Greek phaselos, "a little boat or light vessel," referring to its similarity to a bean pod, this name became the Latin phaseolus used for a kind of bean, while angustissimus means very narrow.
Phaseolus parvulus image
Russ Kleinman  
Phaseolus parvulus image
Russ Kleinman  
Phaseolus parvulus image
Sue Carnahan  
Phaseolus parvulus image
Sue Carnahan  
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Ávila-González H.  
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Ávila-González H.  
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image
Phaseolus parvulus image