Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon


Deschampsia danthonioides
ANNUAL HAIR 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: DeschampsiaView DescriptionDichotomous Key


Common Name: HAIR GRASS
Habit: Annual, perennial herb. Stem: erect, 1 to densely clumped. Leaf: generally basal, tufted; ligule narrow, decurrent to sheath, glabrous to minutely hairy; blade flat to inrolled. Inflorescence: panicle- to spike-like, open to narrow. Spikelet: glumes, lemmas shiny; glumes +- equal, > lower floret; axis prolonged >= 0.75 mm beyond upper floret, conspicuously bristly (sometimes with vestigial floret at tip); florets 1--3, bisexual, breaking above glumes and between florets; callus soft-hairy; lemma rounded, 2--4-toothed at truncate tip, faintly 3--7-veined, awned at or below middle, awn straight to bent; palea +- = lemma.
Species In Genus: 30--40 species: temperate America, Eurasia, New Zealand, Antarctica. Etymology: (Louis Auguste Deschamps, French naturalist, 1765--1842) Note: Deschampsia atropurpurea is now treated as Vahlodea atropurpurea.
eFlora Treatment Author: Robert E. Preston & Dieter H. Wilken
Unabridged Reference: Chiapella 2007 Taxon 56:55--64; Kawano 1963 Canad J Bot 41:719--742
Deschampsia danthonioides (Trin.) Munro
NATIVE
Habit: Annual. Stem: generally 1 to loosely clumped, 1.2--6 dm. Leaf: generally basal, glabrous; ligule 2--4 mm, acute to acuminate, entire; blade 1--9 cm, 1--2 mm wide, generally inrolled. Inflorescence: narrow to open; lower branches generally ascending. Spikelet: glume and lemma tips sometimes +- purple; glumes 4--9 mm, equal, lanceolate, acute to acuminate, 3-veined; florets generally 2; callus hairs < 1/2 lemma length; lemma 2--3 mm, generally 2--3-toothed at tip, faintly 1--3-veined, awned below middle, awn 4--9 mm, generally bent at mid-length. Chromosomes: 2n=26.
Ecology: Moist to drying, open sites, meadows, streambanks, vernal pools, occasionally in alkali soil; Elevation: < 2750 m. Bioregional Distribution: CA-FP (exc Teh, n ChI), MP, DMoj (uncommon); Distribution Outside California: Alaska, northeastern United States, Arizona, Baja California, South America. Flowering Time: Mar--Aug
Jepson eFlora Author: Robert E. Preston & Dieter H. Wilken
Unabridged Reference: Chiapella 2007 Taxon 56:55--64; Kawano 1963 Canad J Bot 41:719--742
Jepson Online Interchange

Previous taxon: Deschampsia cespitosa subsp. holciformis
Next taxon: Deschampsia elongata

Name Search

Botanical illustration including Deschampsia danthonioides

botanical illustration including Deschampsia danthonioides

Contact/Feedback

Citation for this treatment: Robert E. Preston & Dieter H. Wilken 2012, Deschampsia danthonioides, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=22598, accessed on September 17, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on September 17, 2019.

Deschampsia danthonioides
click for enlargement
© 2004 Carol W. Witham
Deschampsia danthonioides
click for enlargement
© 2005 Steve Matson
Deschampsia danthonioides
click for enlargement
© 2005 Steve Matson
Deschampsia danthonioides
click for enlargement
© 2003 George W. Hartwell
Deschampsia danthonioides
click for enlargement
© 2009 Keir Morse
Deschampsia danthonioides
click for enlargement
© 2005 Steve Matson

More photos of Deschampsia danthonioides in CalPhotos



Geographic subdivisions for Deschampsia danthonioides:
CA-FP (exc Teh, n ChI), MP, DMoj (uncommon)
MAP CONTROLS
1. You can change the display of the base map and layers by clicking on the layer control box in the upper right-hand corner.
2. California county polygons can be turned off and on in the layer control box.
3. Filling of Jepson subdivision polygons can be turned off and on in the layer control box.
4. Moving the cursor over any numbered cluster will show the range boundary of the included specimens (with a blue polygon).
5. Marker clustering can be turned off by clicking this link:      Marker Clustering OFF
WARNING: Turning this off might cause maps with large numbers of specimens to load slowly.
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).





 

View elevation by latitude chart


Data provided by the participants of the  Consortium of California Herbaria.
MAP LEGEND
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS


CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.