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.



Shrub, tree, generally dioecious (rarely monoecious)
Stem: trunk < 40 m; wood soft; bark smooth, bitter; buds scaly
Leaves simple, alternate, deciduous; stipules generally deciduous, often large
Inflorescence: catkin, generally appearing before leaves; each flower subtended by disk or 1–2 nectary glands and 1 bract
Flower: perianth 0
Staminate flower: stamens 1–many
Pistillate flower: pistil 1, ovary superior, chamber 1, stigma lobes 2–4
Seeds many; hairs fine, white, cottony
Fruit: capsule; valves 2–4
Genera in family: 2 genera, 340 species: generally temp (except Australia, Malay Archipelago) moist places; many cultivated. Hybridization common; identification often difficult. Family description, key to genera by John O. Sawyer, Jr.



George W. Argus

Shrub, tree, dioecious; bud scale 1, not sticky, margins generally fused (or free, overlapping)
Stem: twigs generally flexible and not glaucous
Leaf: blade linear to widely obovate, entire to toothed, generally ± hairy
Inflorescence: dense catkin emerging before, with, or after leaves, sessile or on a short leafy shoot; bract subtending each flower
Flower: perianth 0
Staminate flower: stamens 1–8
Pistillate flower: ovary stalked or sessile, style 1 or 0, stigmas 2, each sometimes 2-lobed; nectaries 1–several, generally rod-like, generally between inflorescence axis and flower
Fruit: valves 2
Species in genus: ± 400 species: ± worldwide, especially n temp, arctic
Etymology: (Latin: ancient name)
Reference: [Argus 1986 Syst Bot Monog 9:1–170; Dorn 1976 Canad J Bot 54:2769–2789]
Difficult, highly variable. Not all specimens will key easily; sprout shoots and other extreme forms are not included in keys, may require field comparison for identification. Studies of variation, hybridization needed.


S. jepsonii C.K. Schneid.


Shrub < 3 m
Stem: twigs brownish, tomentose or silky, becoming glabrous, brittle at base
Leaves: young leaves silky; mature blade 55–103 mm, ± lanceolate, acute (both ends), entire, lower surface glaucous, densely silky, upper surface sparsely so
Inflorescence appearing with leaves, 13–60 mm, on leafy shoots 1.5–7 mm; flower bract tawny or brown
Staminate flower: stamens 2 or 1
Pistillate flower: ovary silky, narrowly ovoid, style 0.4–0.6 mm, stalk 0.4–1.2 mm
Ecology: Margins of lakes and streams, wet meadows
Elevation: 1000–3400 m.
Bioregional distribution: High Cascade Range, High Sierra Nevada
Synonyms: S. sitchensis Bong vars. angustifolia Bebb and ralphiana (Jeps.) Jeps
Like S. sitchensis Bong. but smaller, leaves narrower (variable), stamens 2 vs 1 (variable), and ovary narrower. May be derived from S. drummondiana Hook. X S. sitchensis Bong
Horticultural information: TRY; STBL.

previous taxon | next taxon
bioregional map for SALIX%20jepsonii being generated

Retrieve Jepson Interchange Index to Plant Names entry for Salix jepsonii
Retrieve dichotomous key for Salix
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