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.



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.


Mary E. Barkworth

Perennial, cespitose
Stem < 1 mm diam
Leaf: sheath glabrous; ligule membranous
Inflorescence panicle-like; axis glabrous, branches glabrous to sparsely puberulent
Spikelet: glumes ± equal, slightly > floret (except awn), purplish, veins not evident, tip rounded to acute; axis breaking above glumes; floret 1; callus 0.1–0.8 mm, blunt; lemma thick, membranous, evenly hairy, margins open with age, awn 12–30 mm, persistent
Species in genus: ± 10 species: temp North America, Asia
Etymology: (Greek: feather grass)
Reference: [Barkworth 1983 Syst Bot 8:395–419]


P. kingii (Bol.) Barkworth


Stem 2–4 dm
Leaf: blade ± 0.3 mm diam, inrolled
Inflorescence 6–10 cm; branches flexible, ascending
Spikelet: glumes 3–4.5 mm; floret 2.8–4.2 mm; lemma awn 10–14 mm, weakly bent once or twice
Chromosomes: 2n=22
Ecology: Subalpine, alpine streambanks, meadows
Elevation: 2700–3500 m.
Bioregional distribution: c&s High Sierra Nevada
Synonyms: Oryzopsis k. (Bol.) Beal
Horticultural information: IRR, DRN, SUN: 1, 2, 3, 6, 7, 14, 15, 16, 17, 18, 19, 20, 21.

previous taxon | next taxon
bioregional map for PTILAGROSTIS%20kingii being generated

Retrieve Jepson Interchange Index to Plant Names entry for Ptilagrostis kingii
Retrieve dichotomous key for Ptilagrostis
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