Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
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).[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, ± hairy
Stems ascending to erect, unbranched, often fragile, easily breaking apart at nodes
Leaves basal and cauline; collar 0; sheath and blade continuous; blade flat or becoming inrolled when dry
Inflorescence spike-like, partly enclosed by upper sheath or exserted with age; spikelets spirally arranged on axis
Spikelet laterally compressed; glumes entire or irregularly short-toothed; florets 5–40, tardily breaking above glumes and between florets; lemmas entire or minutely toothed, generally with central sharp point, 11–17-veined; palea ± = lemma; anthers exserted, filaments slender, ribbon-like; stigmas 1/3–1/2 style length, sparsely short-hairy
Fruit obovoid or oblong
Species in genus: 3 species: CA, s Baja CA
Etymology: (Anagram of Orcuttia)
Reference: [Reeder 1982 Amer J Bot 69:1082–1095]
| Native |
Stem ascending, becoming decumbent, < 12 cm
Leaf 2–4 cm, curved outward, inrolled, tapered to fine point
Inflorescence 1.5–6 cm, ± enclosed in upper sheath; spikelets crowded
Spikelet: glumes 4–7 mm, subequal, short-pointed, sometimes with 1 or 2 short lateral teeth; florets 5–10; lemma 5–7 mm, tip with a few minute teeth, 11–15-veined, central vein ending in a sharp point < 1 mm; anthers ± 3 mm, yellow, drying pinkish
Fruit ± 3 mm, laterally flattened, widely oblong, smooth
Chromosomes: 2n=40
Ecology: Vernal pool, grassland
Elevation: < 150 m.
Bioregional distribution: sw Sacramento Valley (Solano Co.)
Synonyms: Orcuttia m. Crampton
See the CNPS Inventory for information about endangerment and rarity.| 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). |
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