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Phaseolus filiformis
SLENDER-STEM BEAN

Higher Taxonomy
Family: Fabaceae (Leguminosae)View DescriptionDichotomous Key

Common Name: LEGUME FAMILY
Habit: Annual to tree. Leaf: generally alternate, generally compound, generally stipuled, generally entire, pinnately veined Inflorescence: generally raceme, spike, umbel or head; or flowers 1--few in axils. Flower: generally bisexual, generally bilateral; hypanthium 0 or flat to tubular; sepals generally 5, generally fused; petals generally 5, free, fused, or lower 2 +- united into keel (see 3, Key to Groups, for banner, wings); stamens 10 or many (or [1], 5, 6, 7, 9), free or fused or 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1--many, style, stigma 1. Fruit: legume, including a stalk-like base (above receptacle) or not. Seed: 1--many, often +- reniform, generally hard, smooth.
Genera In Family: +- 730 genera, 19400 species: worldwide; with grasses, requisite in agriculture, most natural ecosystems. Many cultivated, most importantly Arachis, peanut; Glycine, soybean; Phaseolus, beans; Medicago, alfalfa; Trifolium, clovers; many orns. Note: Unless stated otherwise, fruit length including stalk-like base, number of 2° leaflets is per 1° leaflet. Upper suture of fruit adaxial, lower abaxial. Anthyllis vulneraria L. evidently a waif, a contaminant of legume seed from Europe. Laburnum anagyroides Medik., collected on Mount St. Helena in 1987, may be naturalized. Ceratonia siliqua L., carob tree (Group 2), differs from Gleditsia triacanthos L. in having evergreen (vs deciduous) leaves that are 1-pinnate (vs 1-pinnate on spurs on old stems, 2-pinnate on new stems) with 2--5(8) (vs 7--17) 1° leaflets, commonly cultivated, now naturalized in southern California. Aeschynomene rudis Benth. , Halimodendron halodendron (Pall.) Voss (possibly extirpated), Lens culinaris Medik. are agricultural weeds. Caragana arborescens Lam. only cult. Ononis alopecuroides L. , Sphaerophysa salsula (Pall.) DC. all evidently extirpated. Cercidium moved to Parkinsonia; Chamaecytisus to Cytisus; Psoralidium lanceolatum to Ladeania.
eFlora Treatment Author: Martin F. Wojciechowski, except as noted
Scientific Editor: Martin F. Wojciechowski, Thomas J. Rosatti.
Genus: PhaseolusView Description 

Common Name: WILD BEAN
Habit: [Annual], perennial herb, vine, unarmed; hairs generally including minute, hooked ones. Leaf: odd-1-pinnate; axis extended beyond basal leaflets, persistent; leaflets 3, entire or lobed. Inflorescence: raceme-like (flowers > 1 per node) [to panicle-like], nodes 1--60, not swollen; bracts, bractlets generally persistent. Flower: calyx lobes < (>) tube; corolla incurved, sickle-shaped in bud, banner oblong to round, in flower recurved 90°, wings twisted into a platform position, keel incurved, tightly, spirally coiled 1.5[2] turns; 9 filaments fused, 1 free; style thickened, +- bristly distally, stigma lateral, turned inward. Fruit: generally dehiscent, linear to oblong rarely rhombic, mostly flat in ×-section. Seed: 1--20, oblong to reniform or rarely discoid.
Species In Genus: +- 70 species: neotropics, warm regions. Etymology: (Classical name, presumably for a bean) Note: Phaseolus coccineus L., Phaseolus lunatus L., Phaseolus vulgaris L. in California possibly as waifs from cultivation.
eFlora Treatment Author: Alfonso Delgado-Salinas

Phaseolus filiformis Benth.
NATIVE
Habit: Short-lived perennial herb, trailing or twining vine; taproot slender. Stem: cylindric or angled, branches many at base, lowermost often opposite. Leaf: leaflets generally 1--5 cm, 1--4.5 cm, wide ovate-triangular, generally lobed. Inflorescence: raceme-like, peduncle 1.2--16 cm, nodes 2--6, 2-flowered. Flower: corolla +- 1 cm, pink-purple, keel coil diam +- 2.5 mm. Fruit: 2.5--3.5 cm, 4--5 mm wide, oblong, generally curved, pendant, +- glabrous. Seed: 4--6(7), 2--4 mm, oblong to reniform, wrinkled, net-like.
Ecology: Washes; Elevation: +- 125 m. Bioregional Distribution: DSon (Coachella Valley, Riverside Co.); Distribution Outside California: to western Texas, northern Mexico. Flowering Time: Generally Oct--Dec
Synonyms: Phaseolus carterae Freytag & Debouck; Phaseolus sanctorum M.E. Jones; Phaseolus wrightii A. Gray
Unabridged Note: Pinacate people (Sonora, Mexico) eat seeds.
eFlora Treatment Author: Alfonso Delgado-Salinas
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Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Alfonso Delgado-Salinas 2016. Phaseolus filiformis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=37632, accessed on July 28, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 28, 2016.


Phaseolus filiformis
click for enlargement
© 2009 Aaron Schusteff
Phaseolus filiformis
click for enlargement
© 2009 Aaron Schusteff

More photos of Phaseolus filiformis in CalPhotos


Geographic subdivisions for Phaseolus filiformis:
DSon (Coachella Valley, Riverside Co.);
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.