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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.

 

ERIOPHORUM COTTON GRASS

Peter W. Ball


Perennial herb, erect. Stem: cylindric or 3-angled, solid. Leaf: basal and cauline; ligule present; blade ± scabrous on keel or angles. Inflorescence: 1, terminal, subumbel- or head-like [or spikelet 1]; inflorescence bracts 1–several, leaf- or scale-like; spikelets several [1]; flower bracts spiraled, > 10, ovate, membranous, glabrous, tip entire. Flower: bisexual; perianth bristles 6–7 or 10–25, >> fruit, generally > flower bracts, >> flower bracts in fruit; stamens 3; style 3-branched. Fruit: 3-sided, ± flat.
± 25 species: northern temperate. (Greek: wool-bearing)

Key to Eriophorum

1. Stem 3-angled; perianth bristles 6–7, barbed, yellow-brown; inflorescence generally head-like (1–2-branched) ..... E. crinigerum

1' Stem cylindric; perianth bristles 10–25, smooth, ± white; inflorescence subumbel-like ..... E. gracile

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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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