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Elymus glaucus subsp. virescens

Higher Taxonomy
Family: PoaceaeView DescriptionDichotomous Key

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: ElymusView DescriptionDichotomous Key

Habit: Plant from rhizomes. Stem: 6.5--13 dm, sparsely to densely hairy below inflorescence. Leaf: sheath glabrous or hairy; auricles to 1 mm; ligule 0.4--1.2 mm; blade < 9 mm wide, prominently ribbed. Inflorescence: 7--32 cm; spikelets 1--2 per node, sometimes short-stalked. Spikelet: glumes 8--28 mm, lanceolate, often +- purple, sometimes glaucous; base flat, tapered, awn to 4 mm; florets 2--6; lemma base glabrous, scabrous to hairy near tip; anthers 3.3--7.5 mm. Chromosomes: 2n=28,42.
Note: A sterile hybrid between Elymus mollis and Elymus triticoides.
Species: Elymus glaucusView Description 

Habit: Sometimes short-rhizomed. Stem: 3--14 dm. Leaf: sheath glabrous or hairy, auricles +- 2 mm; ligule < 1 mm; blade 4--12(17) mm wide, generally flat. Inflorescence: 5--21 cm (except awns), erect or nodding, not breaking apart with age; internodes 4--8(12) mm; spikelets (1)2(3) per node. Spikelet: 8--16 mm, appressed to divergent; glumes 6.5--19 mm, generally short-awned; florets (1)2--4(6), lower florets concealed; lemma 8.5--14 mm, awn 0--30 mm, generally straight; anthers 1.5--3.5 mm. Chromosomes: 2n=28.
Note: Hybridizes with Elymus elymoides, Elymus stebbinsii, Elymus trachycaulus to produce highly variable populations.

Elymus glaucus subsp. virescens (Piper) Gould
Leaf: sheath, blade +- glabrous or scabrous. Spikelet: glume awns 0--2 mm; lemma awns (0)1--5(7) mm.
Ecology: Conifer forest, chaparral, rocky soils, riverbanks; Elevation: < 2800 m. Bioregional Distribution: NCo, NCoRO, CW; Distribution Outside California: to Alaska. Flowering Time: Jun--Aug
eFlora Treatment Author: James P. Smith, Jr.
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Citation for this treatment: James P. Smith, Jr. Elymus glaucus subsp. virescens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on November 20, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017, Jepson eFlora,, accessed on November 20, 2017.

Elymus glaucus subsp. virescens
click for enlargement
© 2007 Steve Matson
Elymus glaucus subsp. virescens
click for enlargement
© 2007 Steve Matson
Elymus glaucus subsp. virescens
click for enlargement
© 2007 Steve Matson
Elymus glaucus subsp. virescens
click for enlargement
© 2007 Steve Matson
Elymus glaucus subsp. virescens
click for enlargement
© 2007 Steve Matson
Elymus glaucus subsp. virescens
click for enlargement
© 2007 Steve Matson

More photos of Elymus glaucus subsp. virescens in CalPhotos

Geographic subdivisions for Elymus glaucus subsp. virescens:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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.