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| Jepson eFlora: Taxon page
Key to families | Table of families and genera |
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Indexes to all accepted names and synonyms: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | |
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Annual to woody per; roots generally fibrous.
Stem: generally round, hollow; nodes swollen, solid.
Leaf: alternate, 2-ranked, generally linear, parallel-veined; 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; perianth vestigial; stamens generally 3; stigmas generally 2, generally plumose.
Fruit: grain (rarely achene-like).
650–900 genera; ± 10550 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials). [Barkworth et al. 2003 FNANM:25; Barkworth et al. 2007 FNANM:24] Generally wind-pollinated. Achnatherum, Ampelodesmos, Hesperostipa, Nassella, Piptatherum, Piptochaetium, Ptilagrostis moved to Stipa; Elytrigia, Leymus, Pascopyrum, Pseudoroegneria, Taeniatherum to Elymus; Hierochloe to Anthoxanthum; Lolium, Vulpia to Festuca; Lycurus to Muhlenbergia; Monanthochloe to Distichlis; Pleuraphis to Hilaria; Rhynchelytrum to Melinis. The following taxa (in genera not included here), recorded in CA from historical collections or reported in literature, are extirpated, lacking vouchers, or not considered naturalized: Acrachne racemosa (Roth) Ohwi, Allolepis texana (Vasey) Soderstr. & H.F. Decker, Amphibromus nervosus (Hook. f.) Baill., Axonopus affinis Chase, Axonopus fissifolius (Raddi) Kuhlm., Coix lacryma-jobi L., Cutandia memphitica (Spreng.) K. Richt., Dinebra retroflexa (Vahl) Panz., Eremochloa ciliaris (L.) Merr., Eustachys distichophylla (Lag.) Nees, Gaudinia fragilis (L.) P. Beauv., Miscanthus sinensis Andersson, Neyraudia arundinacea (L.) Henrard, Phyllostachys aurea Rivière & C. Rivière, Phyllostachys bambusoides Siebold & Zuccarini, Rottboellia cochinchinensis (Lour.) Clayton, Schedonnardus paniculatus (Nutt.) Branner & Coville, Schizachyrium cirratum (Hack.) Wooton & Standl., Schizachyrium scoparium (Michx.) Nash, Themeda quadrivalvis (L.) Kuntze, Thysanolaena latifolia (Hornem.) Honda, Tribolium obliterum (Hemsl.) Renvoize, Zea mays L., Zizania palustris L. var. interior (Fassett) Dore, Zoysia japonica Steud. Paspalum pubiflorum E. Fourn., Paspalum quadrifarium Lam., are now reported for s CA (J Bot Res Inst Texas 4:761–770). See Glossary p. 30 for illustrations of general family characteristics. —Scientific Editors: James P. Smith, Jr., J. Travis Columbus, Dieter H. Wilken.
Unabridged references: [Hitchcock 1951 Manual grasses US, USDA Misc Publ 200; Clayton & Renvoise 1986 Kew Bull Add Series 13]
Annual, ± hairy.Key to Orcuttia
Stem: erect, becoming prostrate.
Leaf: basal and cauline; collar 0; sheath and blade continuous; basal leaves long, floating when young, becoming dry and non-functional as aerial parts grow; cauline leaf blade flat or inrolled when dry.
Inflorescence: generally spike-like, exserted; spikelets 2-ranked; axis breaking above glumes and between florets with age.
Spikelet: laterally compressed; florets 4–40; glumes irregularly 2–5-toothed; lemma strongly 5-toothed, each tooth 1/3–1/2+ lemma, prominent central vein flanked by 2 weaker veins; palea < lemma; anthers white or ± pink, exserted, filaments slender, ribbon-like; stigma 1/3–1/2 style, ± sparsely short-hairy.
5 species: CA, n Baja CA. (C.R. Orcutt, CA botanist, 1864–1929) [Reeder 2003 FNANM 25:290–292]
Unabridged references: [Reeder 1982 Amer J Bot 69:1082–1095]
Plant generally with 1 main stem, sometimes weakly cespitose, sparsely hairy.
Stem: generally erect, sometimes becoming decumbent, 5–15(25) cm, often branching in upper 2–10 cm.
Leaf: blade 1.5–2 mm wide.
Inflorescence: 5–10 cm, exserted with age; spikelets ± evenly spaced on axis.
Spikelet: glumes 3–6 mm, subequal, 3–5-toothed, teeth < 1 mm; florets 5–20; lemma 4.5–6 mm, acute or with awn-tipped teeth, teeth ± equal, ± 1/2 lemma body, spreading or slightly recurved; palea slightly < lemma; anthers ± 3 mm.
Fruit: ± 3 mm, narrowly oblong.
2n=26. Vernal pools; 200–1100 m. Inner North Coast Ranges (Lake Co.), Cascade Range, Sacramento Valley, Modoc Plateau.
Previous taxon: Orcuttia pilosa
Next taxon: Orcuttia viscida
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
Copyright © 2012 Regents of the University of California
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| Bioregions in which taxon occurs | Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. |
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Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates. | Data provided by the participants of the Consortium of California Herbaria.
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