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.

ERAGROSTIS

LOVEGRASS

John R. Reeder

Annual, perennial herb, often glandular; glands often wart-like, circular, pitted
Leaf: sheath margin hairy on sides just below collar; ligules ciliate
Inflorescence generally panicle-like, open or dense, sometimes spike-like, often glandular
Spikelet laterally compressed; glumes ± unequal, acute or acuminate, 1(3)-veined; florets 3–many, axis breaking above glumes and between florets (or persistent with glumes and lemmas deciduous, paleas remaining attached or not); lemma keeled or rounded, acute or obtuse, 3-veined, veins generally obvious; palea ± = lemma
Fruit lens-shaped or elliptic, sometimes grooved, generally red-brown
Species in genus: ± 300 species: tropical, warm temp
Etymology: (Greek: eros, love, agrostis, a kind of grass)
Reference: [Koch 1974 Ill Biol Monogr 48:1–74]

Native

E. pilosa (L.) P. Beauv. var. pilosa

Annual
Stem ascending to erect, 1–6.5 dm; axis below nodes rarely glandular
Leaf: sheath glabrous, margin sparsely hairy near collar, not glandular; ligule < 0.5 mm; blade 2–20 cm, 1–3.5 mm wide, flat to ± inrolled
Inflorescence 4–20 cm, < 15 cm wide, ± open; lower 1–2 nodes with whorled branches; primary branches slender, spreading or ascending, rarely reflexed; spikelet stalks appressed to spreading
Spikelet 3.5–10 mm, 1–2 mm wide; lower glume 0.5–1 mm, generally < 1/2 lowest lemma length, upper slightly > lower; axis not breaking apart, paleas deciduous; florets 5–16; lemma ± 1.5 mm, gray-green with purple or reddish tip, lateral veins obscure
Fruit 0.5–0.9 mm, light to dark brown, ovoid, smooth
Chromosomes: 2n=40
Ecology: Disturbed sandy soils
Elevation: < 200 m.
Bioregional distribution: Klamath Ranges, Great Central Valley, Modoc Plateau
Distribution outside California: generally e US to Texas, Caribbean, Mexico

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bioregional map for ERAGROSTIS%20pilosa%20var.%20pilosa 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 Eragrostis pilosa var. pilosa
Retrieve dichotomous key for Eragrostis
Overlay Consortium of California Herbaria specimen data by county on this map
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