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
Festuca myuros

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: FestucaView DescriptionDichotomous Key

Habit: Annual, perennial herb, loosely to densely cespitose, generally +- glabrous, rhizomes present or 0; bisexual, dioecious in Festuca kingii. Stem: decumbent, ascending to erect, to 2 m. Leaf: basal and cauline; sheath generally persisting; collar generally glabrous; ligule generally < 1 mm, membranous, truncate, minutely fringed; blade flat or rolled, claw-like basal auricles generally 0. Inflorescence: panicle-like, branches dense and appressed to open and spreading or spike-like. Spikelet: glumes 2, < lowest floret, unequal, lower sometimes minute, 1--3-veined, upper 3--5-veined; axis breaking above glumes and between florets, florets (1)2--10(17), generally bisexual; lemma 3--5(7)-veined, base generally glabrous, tip entire, occasionally minutely 2-toothed, awn 0 or terminal, generally straight, glabrous; palea +- = lemma; stamens 3 or 1. Fruit: obovoid to elongate, free from or +- adhering to palea and lemma.
Species In Genus: 500+ species: cosmopolitan. Etymology: (Latin: straw, stem or straw-like weed) Note: As treated here, including ×Festulpia, ×Festulolium, Leucopoa, Lolium, ×Schedolium, ×Schedololium, Schedonorus, and Vulpia. Lolium rigidum Gaudin (combination in Festuca evidently not available), native to Europe and Africa, has been found sporadically as an urban and agricultural weed, but has not been collected in recent years and is doubtfully naturalized.
eFlora Treatment Author: James P. Smith, Jr. & Susan G. Aiken

Festuca myuros L.
Habit: Annual. Stem: < 7.5 dm, glabrous or scabrous only near inflorescence. Inflorescence: 4--25 cm, < 2 cm wide, +- dense; base often enclosed in sheath at maturity; branches 1--3 per node; spikelet stalk < 1 mm, slender. Spikelet: 5--11.5 mm; lower glume generally < 2 mm, upper +- 2.5--5.5 mm; florets 3--6; lemma 4.5--6.5, awn 5--15 mm. Fruit: 3.5--4.5 mm. Chromosomes: 2n=42.
Ecology: Common. Generally open places, sandy soils; Elevation: < 2000 m. Bioregional Distribution: CA-FP, D; Distribution Outside California: worldwide; probably native to Europe. Flowering Time: Feb--May
Synonyms: Vulpia myuros (L.) C.C. Gmel. var. hirsuta Hack.; Vulpia myuros f. myuros; Vulpia myuros var. myuros; Festuca megalura Nutt.
eFlora Treatment Author: James P. Smith, Jr. & Susan G. Aiken
Jepson Online Interchange
Weed listed by Cal-IPC

Previous taxon: Festuca minutiflora
Next taxon: Festuca occidentalis

Name Search
botanical illustration including Festuca myuros


Citation for this treatment: James P. Smith, Jr. & Susan G. Aiken 2016. Festuca myuros, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 23, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on October 23, 2016.

Festuca myuros
click for enlargement
© 2009 Keir Morse

More photos of Festuca myuros in CalPhotos

Geographic subdivisions for Festuca myuros:
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.
Blue line denotes eFlora flowering time.