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

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

JUNCACEAE

RUSH FAMILY

Janice Coffey Swab

Annual, perennial herb, generally from rhizomes
Stem round or flat
Leaves generally mostly basal; sheath margins fused, or overlapping and generally with 2 ear-like extensions at blade junction; blade round, flat, or vestigial, glabrous or margin hairy
Inflorescence: head-like clusters or single flowers, variously arranged; bracts subtending inflorescence 2, generally leaf-like; bracts subtending inflorescence branches 1–2, reduced; bractlets subtending flowers generally 1–2, generally translucent
Flower generally bisexual, radial; sepals and petals similar, persistent, green to brown or purplish black; stamens generally 3 or 6, anthers linear, persistent; pistil 1, ovary superior, chambers generally 1 or 3, placentas 1 and basal or 3 and axile or parietal, stigmas generally > style
Fruit: capsule, loculicidal
Seeds 3–many, often with white appendages on 1 or both ends
Genera in family: 9 genera, 325 species: temp, arctic, tropical mtns. Fls late spring to early fall.

JUNCUS

RUSH

Annual, perennial herb; rhizome (if any) generally with scale-like leaves
Stem generally cylindric or flat
Leaf: blade well developed and cylindric or flat, or reduced to small point; crosswalls often present (pull fresh blade apart lengthwise to see or slide leaf between fingers to feel); appendages often present at blade-sheath junction
Inflorescence generally terminal (appearing lateral when pushed aside by lowest inflorescence bract); bractlets 0–2
Flowers: stamens generally 3 or 6 (2 in some very small annual taxa); pistil 1, ovary chambers 1 or 3, placentas axile or parietal, stigmas generally 3(2)
Seeds many
Species in genus: 225 species: worldwide, especially n hemisphere
Etymology: (Latin: to join or bind, from use of stems)
Reference: [Ertter 1986 Mem NY Bot Gard 39:1–90]

Native

J. dudleyi Wiegand

DUDLEY'S RUSH

Perennial, cespitose, 20–60 cm
Leaves ± basal; sheath margins scarious; sheath appendages < 2 mm, firm, yellowish to reddish, glossy; blade with flat side toward stem, generally < 1/2 stem length, 1–1.3 mm wide, soft, margins generally inrolled
Inflorescence: lowest bracts leaf-like, 1 generally >> inflorescence; branches unequal; flowers solitary, generally denser near stem tips; bractlets 2 per flower, blunt
Flower: perianth 4–5 mm, lanceolate, acuminate, conspicuously spreading in fruit; stamens 6, filaments >> anthers
Fruit < perianth, widely ovoid; chamber 1 (septa incomplete)
Seed < 0.4 mm, oblong; appendages minute
Chromosomes: 2n=80
Ecology: UNCOMMON. Wet areas in montane conifer forest
Elevation: < 2000 m.
Bioregional distribution: Klamath Ranges
Distribution outside California: scattered to e N.America
Synonyms: J. tenuis Willd. var. d. (Wiegand) F.J. Herm
See the CNPS Inventory for information about endangerment and rarity.
previous taxon | next taxon
bioregional map for JUNCUS%20dudleyi being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Juncus dudleyi
Retrieve dichotomous key for Juncus
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
Glossary


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