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
Sclerochloa dura

Higher Taxonomy
Family: Poaceae (Gramineae)View 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: SclerochloaView Description 

Habit: Annual. Stem: generally prostrate to ascending, less often erect. Leaf: basal and cauline; sheath glabrous, upper often inflated; blade flat or folded, glabrous or minutely scabrous. Inflorescence: raceme-like or panicle-like, contracted, 1-sided, often partially enclosed in upper leaf sheath(s). Spikelet: bisexual, sessile or short-stalked, axis breaking tardily and irregularly; glumes unequal, florets 2--7; lemma prominently 5--9-veined; palea < lemma.
Species In Genus: 2 species: Eurasia. Etymology: (Greek: hard grass, from leathery glumes and lemmas)
eFlora Treatment Author: David M. Brandenburg
Reference: Brandenburg 2007 FNANM 24:480--482
Unabridged Reference: Brandenburg et al. 1991 Sida 14:369--376

Sclerochloa dura (L.) P. Beauv.
Stem: 2--15(30) cm. Leaf: blade 0.5--5(7) cm, 1--4 mm wide, tip prow-shaped. Inflorescence: 1--4 cm, 0.5--2(4) cm wide, dense, spikelets overlapping. Spikelet: (3.4)5--15 mm; florets (2)3--4(7); glumes << lower lemmas, rounded, lower +- 1--3 mm, upper 2.5--6 mm; lemma 3--7 mm, strongly keeled, obtuse, awn 0. Chromosomes: 2n=14.
Ecology: Disturbed sites; Elevation: 700--800 m. Bioregional Distribution: w CaRH (Shasta Valley); Distribution Outside California: widespread in United States; nearly cosmopolitan; native from south-central Europe to central Asia. Flowering Time: May
eFlora Treatment Author: David M. Brandenburg
Reference: Brandenburg 2007 FNANM 24:480--482
Unabridged Reference: Brandenburg et al. 1991 Sida 14:369--376
Jepson Online Interchange

Previous taxon: Sclerochloa
Next taxon: Scleropogon

Name Search
botanical illustration including Sclerochloa dura


Citation for this treatment: David M. Brandenburg 2012, Sclerochloa dura, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on July 18, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on July 18, 2018.

Geographic subdivisions for Sclerochloa dura:
w CaRH (Shasta Valley);
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).

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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.