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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POACEAE

GRASS FAMILY

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.

LEPTOCHLOA

SPRANGLETOP

Annual, perennial herb
Stems spreading to erect
Leaves generally cauline; ligule membranous, ± entire to jagged, sometimes ciliate; blade flat
Inflorescence panicle-like; branches spike-like; spikelets short-stalked or sessile
Spikelets compressed or ± cylindrical; glumes equal or unequal, 1(3)-veined, short-awned or not; axis breaking apart above glumes and between florets; florets generally 2–12; lemma back rounded or keeled, glabrous or hairy, 3-veined, tip obtuse or minutely 2-lobed, awn generally 0; stamens 2 or 3
Species in genus: 40 species: warm temp, tropical
Etymology: (Greek: slender grass, from slender inflorescence)
Reference: [McNeill 1979 Brittonia 31:399–404]

Native

L. mucronata (Michx.) Kunth

RED SPRANGLETOP

Annual
Stems decumbent to erect, 1–10 dm, sometimes reddish or purple
Leaf: sheath papillate; ligule 1–2 mm, entire to jagged and hairy; blade 5–30 cm, 3–10 mm wide
Inflorescence 3–20 cm; branches generally ascending, lower 5–10 cm
Spikelet 1–2 mm, compressed; glumes 1–2 mm, ± equal, purplish; florets (2)3–4; lemma 1–2 mm, keeled, veins hairy, tip minutely 2-lobed, awn 0
Chromosomes: 2n=20
Ecology: Wet sites, drying ponds
Elevation: < 100 m.
Bioregional distribution: Sonoran Desert (Imperial Co.)
Distribution outside California: to s US, Mexico, S.America
Flowering time: Sep–Dec
Synonyms: Leptochloa filiformis (Pers.) P. Beauv

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bioregional map for LEPTOCHLOA%20mucronata 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 Leptochloa mucronata
Retrieve dichotomous key for Leptochloa
Overlay Consortium of California Herbaria specimen data by county on this map
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