Schoenoplectus acutus var. occidentalis

(S. Watson) S. G. Smith

Novon 5: 97. 1995.

Common names: Common tule
Illustrated
Basionym: Scirpus lacustris var. occidentalis S. Watson Bot. California 2: 218. 1880
Synonyms: Scirpus acutus var. occidentalis (S. Watson) Beetle Scirpus rubiginosus Beetle
Treatment appears in FNA Volume 23. Treatment on page 49. Mentioned on page 48.

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 planoconvex or compressed obtusely trigonous.


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

Distribution

V23 67-distribution-map.jpg

B.C., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Tex., Utah, Wash., Wyo., n Mexico

Discussion

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

Selected References

None.

Lower Taxa

None.

"prolonged" is not a number.

with transverse wavy ridges +  and rugose +
trigonous;compressed;planoconvex +
2 cm20 mm <br />0.02 m <br /> (?) +
S. Galen Smith +
(S. Watson) S. G. Smith +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
shortened +
deciduous +
enlarged +
Scirpus lacustris var. occidentalis +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
usually much shorter +
rudimentary +
1 (?) +  and 2 (?) +
c-shaped +  and dorsiventrally flat +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
1mm;2.5mm +
Common tule +
dorsiventrally flat +  and c-shaped or laterally compressed +
dark +  and light green +
2mm +  and 10mm +
100 cm1,000 mm <br />1 m <br /> (400 cm4,000 mm <br />4 m <br />) +
cylindric +
larger +
firm;soft +
4mm;12mm +
0.8 cm8 mm <br />0.008 m <br /> (12 cm120 mm <br />0.12 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
B.C. +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Tex. +, Utah +, Wash. +, Wyo. +  and n Mexico +
0–2100 m +
hypogynous +  and subtending +
membranous-translucent +
biconvex +  and trigonous +
Fresh, often calcareous to brackish marshes, fens, lakes, slow streams, often emergent in water to 1.5 m +
0-3 times branched branches sometimes flexible +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
cauline +  and basal +
membranous +
scabridulous +
v--shaped +
curved +  and straight +
with (1-)3-6(-30) bristles and/or scales +
Fruiting (spring–)summer(–fall). +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
1 cm10 mm <br />0.01 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
adventitious +
sparsely +  and often densely reddish or straw-colored +
deciduous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
basal +  and proximal +
spinulose-papillose +
2mm;3mm +
pinnate-fibrillose +
Illustrated +
0.6 cm6 mm <br />0.006 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
4 +  and 190 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
3-fid +  and 2-fid +
Scirpus acutus var. occidentalis +  and Scirpus rubiginosus +
Schoenoplectus acutus var. occidentalis +
Schoenoplectus acutus +
variety +
not +  and rhizomatous +