Jepson eFlora: Taxon page
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
Desmazeria rigida

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: DesmazeriaView Description 

Habit: Annual. Stem: prostrate to erect, 1 to clumped. Leaf: basal and cauline; sheath open; ligule membranous, toothed at tip; blade flat to inrolled. Inflorescence: raceme- or panicle-like. Spikelet: subsessile to short-stalked; florets 5--25, bisexual, breaking above glumes and between florets; glumes +- equal, lower lanceolate, 1--3-veined, upper +- elliptic, 3-veined; lemma firmly membranous, acute to obtuse, 1--5-veined; palea < lemma.
Species In Genus: 6--7 species: Europe. Etymology: (J.B. Desmazières, French botanist, horticulturist, 1786--1862)
eFlora Treatment Author: Gordon C. Tucker

Desmazeria rigida (L.) Tutin
NATURALIZED
Stem: generally erect, 10--60 cm, glabrous. Leaf: blade 2--25 cm, 1--3 mm wide, flat, glabrous. Inflorescence: panicle-like, ovoid, 4--8(12) cm; branches, pedicels rigid, 3-angled; branches widely spreading. Spikelet: 4--10 mm, 2--5 borne on lower branches, lowest in axil; florets 5--12; glumes, lemmas generally glabrous; glumes 1--2.5 mm; lemmas spreading, 2--3 mm, translucent at acute to abruptly soft-pointed tip. Chromosomes: 2n=14.
Ecology: Open, often sandy sites; Elevation: < 700 m. Bioregional Distribution: s NCo, CCo, SnFrB, SCo, s ChI (Santa Catalina Island); Distribution Outside California: North America; native to southern and western Europe. Flowering Time: Apr--Sep
Synonyms: Scleropoa rigida (L.) Griseb.
eFlora Treatment Author: Gordon C. Tucker
Jepson Online Interchange

Previous taxon: Desmazeria
Next taxon: Digitaria

Name Search

Contact/Feedback

Citation for this treatment: Gordon C. Tucker 2016. Desmazeria rigida, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=22633, accessed on May 28, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 28, 2016.


Desmazeria rigida
click for enlargement
© 2008 Steve Matson
Desmazeria rigida
click for enlargement
© 2008 Steve Matson
Desmazeria rigida
click for enlargement
© 2008 Steve Matson
Desmazeria rigida
click for enlargement
© 2008 Steve Matson
Desmazeria rigida
click for enlargement
© 2008 Steve Matson

More photos of Desmazeria rigida in CalPhotos


Geographic subdivisions for Desmazeria rigida:
s NCo, CCo, SnFrB, SCo, s ChI (Santa Catalina Island);
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.
READ ABOUT YELLOW FLAGS
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.
View all CCH records

CCH collections by month

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