Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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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.


Dieter H. Wilken

Annual, perennial herb from rhizomes
Stems decumbent to erect; nodes often hairy
Leaves generally cauline; blade flat to inrolled, glabrous to short-hairy; ligule membranous
Inflorescence spike-like to raceme-like; spikelets generally 1 per node, subcylindric, ascending to appressed, sessile to short-stalked
Spikelet: glumes unequal, < lowest floret, 5–9-veined, acute to awned; florets 7–20+, bisexual; axis breaking above glumes and between florets; lemma backs rounded, 7–9-veined, acute to awned from tip; palea slightly < lemma, clearly ciliate or toothed
Species in genus: ± 15 species: temp, subtropical worldwide
Etymology: (Greek: short foot, from short, thick spikelet stalk in some species)


B. pinnatum (L.) P. Beauv.

Perennial from rhizomes, generally > 50 cm
Stem generally erect
Leaf: blades (7)10–30 cm, 1.5–4 mm wide, ± inrolled when dry
Inflorescence 9–20 cm; spikelets 6–15(20) per stem
Spikelet: glumes 5–8 mm; florets 7–24; lemma 7–9 mm, acute to short-awned, awn < 3 mm; palea finely ciliate above middle
Ecology: Dunes, disturbed places
Elevation: < 30 m.
Bioregional distribution: s North Coast, expected elsewhere
Distribution outside California: native to Europe
Plants with leaf blades tightly inrolled, rhizomes many-branched, have been called B. phoenicoides (L.) Roem. & Schult.

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bioregional map for BRACHYPODIUM%20pinnatum being generated
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).

Retrieve Jepson Interchange Index to Plant Names entry for Brachypodium pinnatum
Retrieve dichotomous key for Brachypodium
Overlay Consortium of California Herbaria specimen data by county on this map
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