Flora of North America species comparison

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Schoenoplectus acutus var. occidentalis
Photo is of parent taxon

common tule, hard-stem bulrush, tule
Culms

dark to light green, 1–4 m × 4–12 mm, firm to soft, larger air cavities in distal 1/4, 1–2.5 mm wide.
Leaves

sheath fronts mostly delicately pinnate-fibrillose.
Inflorescences

to 3 times branched, branches sometimes flexible and drooping.
Spikelets

4–190, 6–24 × 4 mm.
Flowers

perianth bristles (4–)6(–8), equaling to less than 1/2 achene body, rarely rudimentary;

styles from 2-fid with few 3-fid at spikelet apex to mostly (or all) 3-fid.
Achenes

plano-convex or compressed obtusely trigonous.

Schoenoplectus acutus var. occidentalis
Phenology Fruiting (spring–)summer(–fall).
Habitat Fresh, often calcareous to brackish marshes, fens, lakes, slow streams, often emergent in water to 1.5 m
Elevation 0–2100 m (0–6900 ft)
Distribution
from FNA
AZ; CA; CO; ID; MT; NM; NV; OR; TX; UT; WA; WY; BC; n Mexico
[BONAP county map]
Discussion

Schoenoplectus acutus var. occidentalis forms sterile hybrids with S. californicus in California (S. G. Smith 1995; see 1. S. tabernaemontani).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 23, p. 49.
Parent taxa Cyperaceae > Schoenoplectus > sect. Schoenoplectus > Schoenoplectus acutus
Sibling taxa
S. acutus var. acutus
Synonyms Scirpus lacustris var. occidentalis, Scirpus acutus var. occidentalis, Scirpus rubiginosus
Name authority (S. Watson) S. G. Smith: Novon 5: 97. (1995)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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