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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

ERIOCHLOA CUP GRASS

Robert Webster


Annual [perennial herb]. Stem: decumbent to erect. Leaf: basal and cauline; sheath glabrous or hairy; ligule generally < 1 mm, membrane hairy-fringed; blade generally flat. Inflorescence: panicle-like, ± dense; 1° branches spreading to appressed; 2° branches appressed; spikelets many, 1–2 per node, short-stalked to subsessile, on one side of axis. Spikelet: lanceolate, ± dorsally compressed, generally green, falling as 1 unit; glumes strongly unequal, lower glume generally 0, fused to spikelet base to form a disk- or cup-like ring between stalk and upper glume, upper glume ± = spikelet; florets 2, lower floret sterile, generally acuminate, palea 0, upper floret fertile, lemma firm or hard, generally wrinkled, margin inrolled, tip short-pointed to awned.
± 30 species: warm temperate, tropics, worldwide. (Latin: woolly grass) [Shaw & Webster 1987 Sida 12:165–207] Eriochloa villosa (Thunb.) Kunth reported from Sonoma Co. as germinating from birdseed. Report of Eriochloa fatmensis (Hochst. & Steud.) Clayton in northern Desert not verified.

Key to Eriochloa

1. Upper glume awnless ..... E. acuminata var. acuminata

1' Upper glume tapered to short awn, awn generally ± 1–3 mm

2. Spikelets generally 2 per node at middle of branch axis; leaf blade glabrous adaxially; glume awn ± 1–3 mm; upper floret lemma abruptly pointed, point < 0.5 mm ..... E. aristata var. aristata

2' Spikelets generally 1 per node; leaf blade short-hairy adaxially; glume awn 0.4–1 mm; upper floret lemma awn slightly < 1 mm ..... E. contracta

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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].
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