Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



Annual to tree
Leaves generally compound, alternate, stipuled; leaflets generally entire
Inflorescence: generally raceme, spike, umbel or head; flowers sometime 1–2 in axils
Flowers generally bisexual, generally bilateral; hypanthium generally flat or cup-like; sepals generally 5, fused; petals generally 5, free, or the 2 lower ± fused; stamens 1–many, often 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, sometimes including a stalk-like base above receptacle, dehiscent, or indehiscent and breaking into 1-seeded segments, or indehiscent, 1-seeded, and achene-like
Seeds 1–several, often ± reniform, generally hard, smooth
Genera in family: ± 650 genera, 18,000 species: worldwide; with grasses, requisite in agriculture and most natural ecosystems. Many cultivated, most importantly Arachis , peanut; Glycine , soybean; Phaseolus , beans; Medicago ; Trifolium ; and many orns
Reference: [Polhill & Raven (eds) 1981 Advances in legume systematics; Allen & Allen 1981 Leguminosae]
Family description and key to genera by Duane Isely.


Duane Isely

Species in genus: 1 sp
Etymology: (C. Pickering, Am naturalist, 1805–1875)


P. montana Nutt.

Shrub, rhizomed, leafy or with flowers; thorns terminal or axillary
Stem intricately branched, 1–3 m
Leaf palmate or sometimes simple, evergreen; stipules 0; leaflets 1–3, 1–2 cm, elliptic or ovate; petiole ± 0
Inflorescence: raceme, terminal or axillary
Flower: calyx 5–7 mm, barely lobed; corolla 1.5–1.8 cm, generally purple, keel petals free; stamens 10, free
Fruit dehiscent, 3–6 cm, 4–5 mm wide, oblong; margins narrowed between seeds, often wavy
Seeds 1–8
Chromosomes: 2n=28
Ecology: Chaparral, open woodlands, washes
Elevation: generally < 1700 m.
Bioregional distribution: North Coast Ranges, n Sierra Nevada Foothills, San Francisco Bay Area, South Coast Ranges, n Channel Islands, Transverse Ranges, Peninsular Ranges
Distribution outside California: Baja California
Varieties intergrade but are geog separate.

previous taxon | next taxon
bioregional map for PICKERINGIA%20montana being generated

Retrieve Jepson Interchange Index to Plant Names entry for Pickeringia montana
Retrieve dichotomous key for Pickeringia
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California