Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



James P. Smith, Jr., except as specified

Annual to bamboo-like; roots generally fibrous
Stem generally round, hollow; nodes swollen, solid
Leaves alternate, 2-ranked, generally linear; 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; stamens generally 3; stigmas generally 2, generally plumose
Fruit: achene-like grain
Genera in family: 650–900 genera; ± 10,000 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials)
Reference: [Hitchcock 1951 Manual grasses US, USDA Misc Publ 200; Clayton & Renvoise 1986 Kew Bull Add Series 13]
See Glossary p. 26 for illustrations of general family characteristics. Generally wind-pollinated.


Kelly W. Allred

Perennial; rhizomes thick
Stem erect, cane-like
Leaves cauline; sheaths > internodes, glabrous; ligule thinly membranous, fringed; blade flat or folded, glabrous, margin scabrous
Inflorescence panicle-like, dense, silvery to purplish
Spikelet laterally compressed; glumes > florets, 3–5-veined; axis glabrous; florets 4–5, breaking above glumes and between florets; lemmas 3–7-veined, hairy, awn ± 0; palea < lemma
Species in genus: 3 species: warm temp, tropical
Etymology: (Latin: a reed grass)


A. donax L.


Stem < 8 m; nodes glabrous; internodes < 4 cm thick
Leaf: blade < 1 m, 2–6 cm wide
Inflorescence 3–6 dm, plume-like; branches ascending
Spikelets 10–14 mm; glumes 10–13 mm, thin, brownish or purplish; lemmas 8–12 mm, tip 2-toothed, hairs < 8 mm, silky; palea 3–5 mm, hairy at base; anthers 2.5–3 mm
Chromosomes: 2n=110
Ecology: Moist places, seeps, ditchbanks
Elevation: < 500 m.
Bioregional distribution: c Sierra Nevada Foothills, Central Coast, South Coast, San Gabriel Mountains, Desert
Distribution outside California: native to Europe
Flowering time: Mar–Sep

previous taxon | next taxon
bioregional map for ARUNDO%20donax being generated

Retrieve Jepson Interchange Index to Plant Names entry for Arundo donax
Retrieve dichotomous key for Arundo
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California