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
For up-to-date information about California vascular plants, visit the Jepson eFlora.



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.


Dieter H. Wilken

Annual, perennial herb
Stems erect
Leaves basal to cauline; ligule membranous, glabrous to minutely ciliate, toothed at obtuse to truncate tip; blade narrow, flat to inrolled
Inflorescence panicle-like, generally compact, narrow
Spikelet laterally compressed; glumes unequal, upper > and wider than lower, keeled, acute, lower 1-veined, upper faintly 3–5-veined; axis prolonged beyond fertile floret, bristly (sometimes with vestigial floret at tip); florets 2–5, bisexual, breaking above glumes and between florets; lower lemmas generally > glumes, awned or not, 5-veined; palea ± < lemma, tip minutely 2-forked
Species in genus: ± 30 species: temp North America, Eurasia
Etymology: (G.L. Koeler, Germany, born 1765)


K. macrantha (Ledeb.) Schult.


Perennial, cespitose
Stems 2–7 dm, glabrous to puberulent
Leaves generally basal, tufted, glabrous to puberulent; ligule 1–2 mm; blade 3–20 cm, 1–2(3) mm wide, generally ridged
Inflorescence 2–15 cm, 1–2 cm wide, cylindric to narrowly conic, axis and branches puberulent
Spikelet 4–6 mm, ± shiny, tan (sometimes purplish); florets 2–3(4); glumes and lower lemmas minutely scabrous on back; lower glume ± 3 mm, upper ± 5 mm; lemmas 3–5 mm, acute to small-pointed at tip
Chromosomes: 2n=14
Ecology: Dry, open sites, clay to rocky soils, scrub, woodland, coniferous forest, alpine
Elevation: < 3500 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, Central Western California, Transverse Ranges, Peninsular Ranges, Great Basin Floristic Province, Desert Mountains
Distribution outside California: to Alaska, e Canada, c&e US, n Mexico
Flowering time: May–Jul
Synonyms: K. cristata (L.) Pers., an illegitimate name; K. pyramidata (Lam.) P. Beauv. misapplied
Horticultural information: DRN: 4, 5, 6, 14, 15, 16, 17 &IRR, part SHD: 1, 2, 3, 7, 8, 9, 10, 18, 19, 20, 21, 22, 23, 24; also STBL.

previous taxon | next taxon
bioregional map for KOELERIA%20macrantha being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Koeleria macrantha
Retrieve dichotomous key for Koeleria
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
  • This page is no longer being maintained.

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