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Bouteloua aristidoides var. aristidoides
NEEDLE GRAMA

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: BoutelouaView DescriptionDichotomous Key

Common Name: GRAMA
Habit: Annual, perennial herb, generally cespitose. Stem: solid, generally glabrous. Leaf: generally basal; ligule generally < 1 mm, generally hairy; blade flat to inrolled, adaxial surface generally puberulent or short-hairy, often ciliate near ligule, hairs long, bulbous-based. Inflorescence: generally panicle-like; branches spike-like, 1 per node, persistent or deciduous in fruit; spikelets 2-rowed on 1 side of axis, overlapping. Spikelet: sessile or short-stalked, +- cylindric to laterally compressed; glumes generally unequal, generally lanceolate, 1-veined, upper glume firmer than lower; axis (if inflorescence branch persistent) breaking between glumes and lower floret; florets generally 2--3, lower floret bisexual, > upper, upper floret(s) generally reduced, sterile; lemma 3-veined, generally 3-awned, awns straight, scabrous; palea +- = lemma.
Species In Genus: 57 species: America. Etymology: (Claudio (b. 1774) and Esteban (b. 1776) Boutelou, Spanish botanists, horticulturists) Note: Many species important for forage.
eFlora Treatment Author: J. Travis Columbus

Bouteloua aristidoides (Kunth) Griseb. var. aristidoides
NATIVE
Habit: Annual. Stem: decumbent to erect, 0.5--3.5 dm. Leaf: blade < 7 cm, < 2 mm wide. Inflorescence: branches 4--16, 8--25 mm, pendent to appressed, deciduous in fruit; branch axis prolonged beyond terminal spikelet node generally > 5 mm, base densely short-hairy; spikelets 1--4 per branch, generally appressed, falling with branch. Spikelet: upper glume 5--7 mm, glabrous or hairy, acute; florets 1--2; lower floret lemma +- = upper glume, glabrous or hairy, lobes 0, awns 0 or 2, lateral, < 1 mm; base of upper floret (if present) hairy-tufted, lobes generally 0 between awn bases, awns 2--7 mm, generally unequal. Chromosomes: 2n=40.
Ecology: Dry, open, sandy to rocky slopes, flats, washes, disturbed sites, scrub, woodland; Elevation: < 1800 m. Bioregional Distribution: e PR, e&s DMoj, DSon; Distribution Outside California: to Utah, Texas, southern Mexico, South America. Flowering Time: All year Note: Other variety in Arizona, New Mexico, northwestern Mexico.
eFlora Treatment Author: J. Travis Columbus
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botanical illustration including Bouteloua aristidoides var. aristidoides

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Citation for this treatment: J. Travis Columbus 2016. Bouteloua aristidoides var. aristidoides, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=55240, accessed on February 08, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 08, 2016.


Bouteloua aristidoides var. aristidoides
click for enlargement
© 2005 Steve Matson
Bouteloua aristidoides var. aristidoides
click for enlargement
© 2014 Keir Morse
Bouteloua aristidoides var. aristidoides
click for enlargement
© 2014 Keir Morse
Bouteloua aristidoides var. aristidoides
click for enlargement
© 2014 Keir Morse
Bouteloua aristidoides var. aristidoides
click for enlargement
© 2005 Steve Matson
Bouteloua aristidoides var. aristidoides
click for enlargement
© 2014 Keir Morse

More photos of Bouteloua aristidoides var. aristidoides in CalPhotos


Geographic subdivisions for Bouteloua aristidoides var. aristidoides:
e PR, e&s DMoj, DSon;
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.