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Polypogon viridis
WATER BEARD GRASS

Higher Taxonomy
Family: Poaceae (Gramineae)View DescriptionDichotomous Key

Common Name: GRASS FAMILY
Habit: Annual to woody perennial herb; roots generally fibrous. Stem: generally round, hollow; nodes swollen, solid. Leaf: alternate, 2-ranked, generally linear, parallel-veined; 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; perianth vestigial; stamens generally 3; stigmas generally 2, generally plumose. Fruit: grain, sometimes achene- or utricle-like.
Genera In Family: 650--900 genera; +- 10550 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials). Note: Generally wind-pollinated. Achnatherum, Ampelodesmos, Hesperostipa, Nassella, Piptatherum, Piptochaetium, Ptilagrostis moved to Stipa; Elytrigia, Leymus, Pascopyrum, Pseudoroegneria, Taeniatherum to Elymus; Hierochloe to Anthoxanthum; Lolium, Vulpia to Festuca; Lycurus to Muhlenbergia; Monanthochloe to Distichlis; Pleuraphis to Hilaria; Rhynchelytrum to Melinis. The following taxa (in genera not included here), recorded in California from historical collections or reported in literature, are extirpated, lacking vouchers, or not considered naturalized: Acrachne racemosa (Roth) Ohwi, Allolepis texana (Vasey) Soderstr. & H.F. Decker, Amphibromus nervosus (Hook. f.) Baill., Axonopus affinis Chase, Axonopus fissifolius (Raddi) Kuhlm., Coix lacryma-jobi L., Cutandia memphitica (Spreng.) K. Richt., Dinebra retroflexa (Vahl) Panz., Eremochloa ciliaris (L.) Merr., Eustachys distichophylla (Lag.) Nees, Gaudinia fragilis (L.) P. Beauv., Miscanthus sinensis Andersson, Neyraudia arundinacea (L.) Henrard, Phyllostachys aurea Rivière & C. Rivière, Phyllostachys bambusoides Siebold & Zuccarini, Rottboellia cochinchinensis (Lour.) Clayton, Schedonnardus paniculatus (Nutt.) Branner & Coville, Schizachyrium cirratum (Hack.) Wooton & Standl., Schizachyrium scoparium (Michx.) Nash, Themeda quadrivalvis (L.) Kuntze, Thysanolaena latifolia (Hornem.) Honda, Tribolium obliterum (Hemsl.) Renvoize, Zea mays L., Zizania palustris L. var. interior (Fassett) Dore, Zoysia japonica Steud. Paspalum pubiflorum E. Fourn., Paspalum quadrifarium Lam., are now reported for southern California (J Bot Res Inst Texas 4:761--770). See Glossary p. 30 for illustrations of general family characteristics.
eFlora Treatment Author: James P. Smith, Jr., except as noted
Scientific Editor: James P. Smith, Jr., J. Travis Columbus, Dieter H. Wilken.
Genus: PolypogonView DescriptionDichotomous Key

Common Name: BEARD GRASS
Habit: Annual, perennial herb. Stem: decumbent to erect, simple. Leaf: sheath open, loosely enclosing stem, glabrous; ligule thinly membranous, obtuse to truncate, minutely ciliate to toothed; blades +- cauline, flat, scabrous, veins minutely prickly at 10×. Inflorescence: panicle-like, oblong to narrowly ovoid, interrupted to compact, dense. Spikelet: floret and glumes falling as 1 unit at maturity; glumes +- equal, 1-veined, entire or 2-lobed, awns 0, or arising at tip or between lobes, awn straight; floret 1; lemma +- 0.5 × glumes, translucent, 5-veined, tip toothed, awn < glume awn; palea slightly < lemma, transparent; anthers tightly enclosed by lemma and palea. Fruit: oblong, smooth, enclosed by lemma, palea.
Species In Genus: 18 species: warm temperate Eurasia, Africa, South America. Etymology: (Greek: much bearded) Note: Some species ornamental. Polypogon fugax Steud. an historical waif.
eFlora Treatment Author: Steven A. Conley

Polypogon viridis (Gouan) Breistr.
NATURALIZED
Habit: Perennial herb. Stem: 10--100 cm, decumbent to long-trailing, rooting at nodes. Leaf: ligule 1--6 mm; lower blades 3--18 cm, 2--10 mm wide, flat. Inflorescence: 2--15 cm, narrowly lanceolate to elliptic in outline, dense, often interrupted; 1° branches erect to +- appressed, lower 1--4 cm. Spikelet: glumes 1.5--2.5 mm, back finely scabrous; lemma 1--1.5 mm, awn 0. Chromosomes: 2n=28.
Ecology: Common. Disturbed areas, wet areas, ponds, streambanks; Elevation: < 3000 m. Bioregional Distribution: NCo, KR, NCoRO, SN (exc s SNH), GV, CW, SW, SNE, D; Distribution Outside California: southwestern United States; native to Europe, northern Africa, western Asia. Flowering Time: May--Jun
Synonyms: Agrostis viridis Gouan; Agrostis semiverticillata (Forssk.) C. Chr.; Polypogon semiverticillatus (Forssk.) Hyl.
eFlora Treatment Author: Steven A. Conley
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botanical illustration including Polypogon viridis

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Citation for this treatment: Steven A. Conley 2016. Polypogon viridis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=39379, accessed on February 13, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 13, 2016.


Geographic subdivisions for Polypogon viridis:
NCo, KR, NCoRO, SN (exc s SNH), GV, CW, SW, SNE, D;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.