Schoenoplectus acutus var. acutus
Common names: Hard-stem bulrush scirpe aigu
Revision as of 00:59, 30 July 2020 by imported>Volume Importer
Culms dark green, 1–3 m × 2–6 mm, very firm, rarely soft, air cavities in distal 1/4 mostly 0.5 mm wide. Leaves: sheath fronts coarsely pinnate-fibrillose. Inflorescences 2 times branched, branches mostly stiffly ascending. Spikelets 3–40, 6–18 × 3–4 mm. Flowers: perianth bristles 6, equaling achene body; styles 2-fid. Achenes planoconvex. 2n = 36, 38.
Phenology: Fruiting summer.
Habitat: Fresh, often calcareous to brackish marshes, fens, lakes, slow streams, often emergent in water to 1.5 m
Elevation: 0–2700 m
Distribution
Alta., B.C., Man., N.B., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Ark., Colo., Conn., Del., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.Dak., Tex., Vt., Va., Wash., Wis., Wyo., probably Eurasia
Discussion
Selected References
None.
Lower Taxa
None.
"shortened" is not a number."prolonged" is not a number.
... more about "Schoenoplectus acutus var. acutus"
spinulose +
rudimentary +
equaling +
dark +
exceeding +
planoconvex +
1.2mm;1.7mm +
basifixed +
2 cm20 mm <br />0.02 m <br /> (?) +
acute;obtuse +
deciduous +
developed +
usually much shorter +
absent +
rudimentary +
1;many +
2;3 +
dark green +
glabrous +
cylindric +
firm +
2mm;6mm +
Alta. +, B.C. +, Man. +, N.B. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Ark. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.Dak. +, Tex. +, Vt. +, Va. +, Wash. +, Wis. +, Wyo. + and probably Eurasia +
basal +
abundant +
veinless +
amphicarpic +
absent +
single +
bisexual +
splitting +
membranous-translucent +
Fresh, often calcareous to brackish marshes, fens, lakes, slow streams, often emergent in water to 1.5 m +
contorted +
long +
blunt +
Present +
capitate +
paniculate +
2 times branched branches mostly stiffly ascending +
pseudoumbel +
modified +
glabrous +
membranous +
spinulose +
fused +
scabrous +
scabridulous +
green +
deep +
0.3mm;0.5mm +
v--shaped +
spinulose +
straplike +
falling +
bristlelike +
absent +
with (1-)3-6(-30) bristles and/or scales +
fringed +
thin +
2-3(-4)-carpellate +
fused +
pistillate +
subtending +
c--shaped +
Bull. Torrey Bot. Club +
1954 +
tough +
spreading +
conspicuous +
firm +
transverse +
wavy +
adventitious +
fibrous +
empty +
arranged +
deciduous +
3;6 +
spinulose-papillose +
fertile +
ovate +
variable +
bristlelike +
pinnate-fibrillose +
tubular +
single +
contorted +
terete +
3mm;4mm +
distinct +
papillate +
undivided +
2-fid +
Schoenoplectus acutus var. acutus +
Schoenoplectus acutus +
variety +
free +
thin +
absent +
perennial +
5;100 +