Jepson Flora Project: Jepson Interchange    

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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.


John R. Reeder

Species in genus: 1 sp
Etymology: (O. Stapf, British botanist, 1857–1933)


N. colusana (Burtt Davy) Burtt Davy


Annual, cespitose, brown-sticky-glandular with age
Stem ascending, 1–3 dm
Leaf: collar 0; sheath and blade continuous, base loosely enclosing stem; blade 5–12 mm wide
Inflorescence 2–8 cm, 8–12 mm wide, spike-like, cylindric, dense; spikelets spirally arranged along axis; axis generally prolonged above spikelets, naked or with small scales
Spikelet: glumes 0; lemma flat, ± fan-shaped, strongly 7–11-veined; florets generally 5, breaking between florets; lower lemmas ± 5 mm, ± translucent between veins, finely ciliate; palea ± = lemma; anthers ± 2.5 mm
Fruit generally 2.5 mm
Chromosomes: 2n=40
Ecology: Vernal pools
Elevation: < 200 m.
Bioregional distribution: Great Central Valley (Colusa, Merced, Solano, Stanislaus cos.)
Reference: [Reeder 1982 Amer J Bot 69:1082–1095]
Infls resemble miniature ears of corn.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for NEOSTAPFIA%20colusana being generated

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