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    THIS PAGE IS NO LONGER UPDATED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.

POACEAE

GRASS FAMILY

James P. Smith, Jr., except as specified

Annual to bamboo-like; roots generally fibrous
Stem generally round, hollow; nodes swollen, solid
Leaves alternate, 2-ranked, generally linear; sheath generally open; ligule membranous or hairy, at blade base
Inflorescence various (of generally many spikelets)
Spikelet: glumes generally 2; florets (lemma, palea, flower) 1–many; lemma generally membranous, sometimes glume-like; palea generally ± transparent, ± enclosed by lemma
Flower generally bisexual, minute; stamens generally 3; stigmas generally 2, generally plumose
Fruit: achene-like grain
Genera in family: 650–900 genera; ± 10,000 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials)
Reference: [Hitchcock 1951 Manual grasses US, USDA Misc Publ 200; Clayton & Renvoise 1986 Kew Bull Add Series 13]
See Glossary p. 26 for illustrations of general family characteristics. Generally wind-pollinated.

CALAMAGROSTIS

REED GRASS

Craig W. Greene

Perennial, generally from rhizomes
Stems 1–15 dm, generally not branched, ± smooth; nodes generally 2–4
Leaves generally basal and cauline; sheath smooth or scabrous; ligule membranous; blade flat to inrolled
Inflorescence panicle-like, open to dense; branches ± drooping to appressed; spikelets ascending to appressed
Spikelet: glumes subequal, generally lanceolate, acute to acuminate, lower generally 1-veined, upper 3-veined; floret 1, breaking above glumes; axis prolonged beyond floret, hairy; callus hairy; lemma < glumes, awned from below middle to near base, tip generally 4-toothed, veins 3–5, awn straight to twisted, bent; palea ± = lemma, thin
Species in genus: ± 100 species: cool temp (especially moist montane); some forage value
Etymology: (Greek: reed grass)
Reference: [Greene 1980 Ph.D. Thesis Harvard University]
Hybridization, polyploidy, and asexual seed set contribute to taxonomic difficulty.

Native

C. stricta (Timm) Koeler

Loosely cespitose
Stem 2–24 dm
Leaf: sheath smooth; ligule 1–5.5 mm; blade 2–5 mm wide, generally inrolled, lower surface generally smooth, upper surface smooth to scabrous
Inflorescence 5–20 cm, dense, narrow; branches < 1.5–5+ cm, ascending to appressed
Spikelet: glumes 2–6 mm, smooth to scabrous; axis ± 1 mm, hairs = callus hairs; callus hairs 1/2 to = lemma length; lemma 2–5 mm, fine-scabrous, awned at or below middle; awn ± = glume tip, generally straight
Ecology: Mtn slopes, meadows, coastal marshes
Elevation: < 3400 m.
Bioregional distribution: Northwestern California, Cascade Range, High Sierra Nevada, Central Coast, White and Inyo Mountains
Distribution outside California: to Alaska, ne N.America, Eurasia
Sspp. intergrade.

Native

subsp. inexpansa (A. Gray) C.W. Greene


Stem 4–12 dm
Leaf: ligule 2–5.5 mm; blade flat, strongly scabrous, upper surface generally glaucous
Inflorescence 6–20 cm; longest branches < 5+ cm
Spikelet: glumes 3–6 mm, generally thick, opaque; callus hairs 2/3 to = lemma; lemma 2.5–5 mm; awn sometimes twisted, bent, stiff; anthers generally sterile
Chromosomes: 2n=28,56,58,70,84–±120
Ecology: Habitats of sp.
Bioregional distribution: Northwestern California, Cascade Range, n&c High Sierra Nevada, Central Coast
Distribution outside California: to Alaska, ne N.America, ne Asia
Synonyms: C. i. A. Gray
Some plants set seed asexually. Plants from CCo with hard glumes have been called C. crassiglumis Thurber, Thurber's reed grass.

previous taxon | next taxon
bioregional map for CALAMAGROSTIS%20stricta%20subsp.%20inexpansa being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Calamagrostis stricta subsp. inexpansa
Retrieve dichotomous key for Calamagrostis
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