|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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 |
|Family: Cyperaceae||View Description||Dichotomous Key|
|Genus: Schoenoplectus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve var. occidentalis (S. Watson) S.G. Sm.
Habit: Perennial herb 1--4 m; rhizome long, 5--15 mm diam. Stem: 2--10 mm diam, cylindric; wider air cavities in distal 1/4 +- 1--2.5 mm wide. Leaf: blades 1--2, << sheath, 3--7 mm wide; sheath splitting, leaving fibers. Inflorescence: panicle-like; inflorescence bract erect or spreading, 1--9 cm; spikelets 3--100+, in clusters of 1--8, not all 1 on 1 pl, 6--18 mm, 3--4 mm wide; flower bract 3--4 mm, 2--3 mm wide, sparse- (to dense-) scabrous, woolly-ciliate, often deciduously, tip notch 0.3--0.5 mm, awn 0.5--2 mm, often broken off, some or all markedly contorted. Flower: perianth bristles (4)6(8), (vestigial or) <= fruit; stigmas 2--3. Fruit: 2--3 mm, 1.2--1.7 mm wide, smooth, 2--3-sided.
Ecology: Common. Marshes, shores, fens, shallow lakes, often emergent; Elevation: < 2500 m. Bioregional Distribution: CA (exc e D); Distribution Outside California: to British Columbia, Montana, Texas. Flowering Time: Summer Note: Plants with stigmas 2, fruit 2-sided (Schoenoplectus acutus var. acutus) in eastern North America western to Alaska, Washington, Idaho, Texas, possible waif in California. Plants in southern California with stigmas generally 3, fruit generally 3-sided may deserve recognition as var. Intermediates to, putative hybrids with Schoenoplectus californicus collected in CCo, SnFrB, deltaic GV; putative hybrids with Schoenoplectus heterochaetus locally common, with Schoenoplectus tabernaemontani locally common in eastern North America.
Synonyms: Scirpus acutus Muhl. ex Bigelow var. occidentalis (S. Watson) Beetle
Unabridged Note: Occurrence of Schoenoplectus acutus var. acutus in California unresolved because it seems to intergrade completely with Schoenoplectus acutus var. occidentalis and diagnostic characters are difficult to determine.
eFlora Treatment Author: S. Galen Smith
Jepson Online Interchange
Previous taxon: Schoenoplectus
Next taxon: Schoenoplectus americanus
Citation for this treatment: S. Galen Smith 2016. Schoenoplectus acutus var. occidentalis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=79929, accessed on May 02, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 02, 2016.