Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
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.



Jerrold I Davis

Annual, perennial herb; stolons and rhizomes generally 0
Stems decumbent to erect
Leaves basal and cauline; sheath open ± to base; ligule thinly membranous, acute to truncate, sometimes toothed
Inflorescence panicle-like; lower branches reflexed to erect; spikelets stalked
Spikelet bisexual; glumes < lowest floret, lower glume generally 1-veined, upper 3-veined; florets 2–9; lemma generally firm, back generally rounded, sometimes weakly keeled near tip, margin entire to scabrous-serrate near tip at 10X , glabrous to weakly puberulent at base, generally faintly 5-veined; awn 0; palea ± = lemma
Species in genus: 50 species: temp to arctic, North America, Eurasia
Etymology: (B. Puccinelli, Italy, 1808–1850)
Reference: [Davis 1983 Syst Bot 8:341–353]
Generally on wet saline or alkaline soils; some species difficult to separate without hand lens.


P. howellii J.I. Davis


Leaf: cauline blade inrolled, 1.5–2 mm wide when flat
Inflorescence 2–7 cm; lower branches erect to reflexed in fruit; spikelet stalk glabrous to sparsely scabrous
Spikelet: lemma tip acute to obtuse, margin near tip scabrous-serrate, lowest lemma 2.5–3.5 mm; anthers of lowest floret 1.5–2 mm
Ecology: Mineral springs
Elevation: ± 500 m.
Bioregional distribution: Klamath Ranges (Shasta Co.).
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for PUCCINELLIA%20howellii 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 Puccinellia howellii
Retrieve dichotomous key for Puccinellia
Overlay Consortium of California Herbaria specimen data by county on this map
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