|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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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.
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) 1many; 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: 650900 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.
Annual, perennial herb
Stem generally erect
Leaves generally cauline
Leaf: sheath margins fused > 1/2 length; ligule membranous; blade flat or folded, drooping
Spikelet 1.58 cm; glumes << lowest floret, translucent, lower 1-veined, upper 13-veined; florets 520; lemma 79-veined, veins prominent, not converging, extending to tip, awn 15 mm; palea ± = lemma, veins with appendages
Species in genus: 5 species: temp w North America., 1 sp. in e Asia
Etymology: (Greek: side beard, from awn at palea base in some species)
Annual, perennial herb
Stem decumbent to erect, clumped, 1.59.5 dm, often rooting at lower nodes
Leaf: ligule 26 mm; blade 36 mm wide
Inflorescence 830 cm
Spikelet 1550 mm, spreading to erect; lower glume 14.5 mm, upper 26.5 mm; lemma 4.57.5 mm, awn < 11 mm
Ecology: Wet places, redwood, oak forests
Elevation: < 650 m.
Bioregional distribution: Northwestern California, Cascade Range Foothills, n&c Sierra Nevada Foothills, San Francisco Bay Area.Perennial, short-awned plants from NCoRO have been called P. davyi L.D. Benson.
|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).|