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.



Reed C. Rollins, except as specified

Annual to subshrub
Leaves generally basal and cauline, alternate, generally simple; stipules 0
Inflorescence: generally raceme
Flower bisexual; sepals 4, free; petals (0)4, free, generally white or yellow, often clawed; stamens generally (2,4)6, generally 4 long, 2 short; ovary 1, superior, chambers generally 2, septum membranous, connecting 2 parietal placentas, style 1, stigma simple or 2-lobed
Fruit: generally capsule ("silique") with 2 deciduous valves, sometimes breaking transversely or indehiscent
Seeds 1–many per chamber
Genera in family: 300+ genera, 3000+ species: worldwide, especially cool regions; some cultivated for food (especially Brassica, Raphanus ) and ornamental
Recent taxonomic note: Recently treated to include Capparaceae [Rodman et al. 1993 Ann Missouri Bot Gard 80:686–699; Rollins 1993 Cruciferae of Continental North America. Stanford Univ Press]
Family description, key to genera by Robert A. Price.


Species in genus: 1 sp
Etymology: (Greek: many combs, from leaves)


P. fremontii (S. Watson) Greene

Perennial, cespitose, often glaucous
Stems erect, few–several, generally simple, 5–15 cm; caudex without persistent leaf bases, branched
Leaf 1–2 cm, ± sessile, deeply pinnately lobed to compound, rigid; lobes or leaflets ± 1–5 mm, linear, often sharp-pointed with terminal hair; hairs stiff, generally branched
Inflorescence ± dense, ± umbel-like; bracts 0
Flower: sepals erect, 2–3 mm, oblong; petals 5–6 mm, white to pale purple
Fruit ascending to erect, often flat perpendicular to septum, glabrous; pedicel ascending, 4–6 mm, straight
Seeds 12–28, 1 row per chamber, ± 1 mm, oblong; wing 0; embryonic root at back of 1 cotyledon
Ecology: Saline soils, playas, lake margins, wet meadows
Elevation: 1000–2000 m.
Bioregional distribution: Great Basin Floristic Province
Distribution outside California: to Idaho, Nevada

previous taxon | next taxon
bioregional map for POLYCTENIUM%20fremontii being generated

Retrieve Jepson Interchange Index to Plant Names entry for Polyctenium fremontii
Retrieve dichotomous key for Polyctenium
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