Fimbristylis vahlii

(Lamarck) Link

Hort. Berol. 1: 287. 1827.

Illustrated
Basionym: Scirpus vahlii Lamarck in J. Lamarck and J. Poiret, Tabl. Encycl. 1: 139. 1791 (as vhalii)
Synonyms: Fimbristylis apus (A. Gray) S. Watson Fimbristylis congesta Torrey Fimbristylis vincentii Steudel Isolepis vahlii (Lamarck) Kunth Scirpus apus A. Gray
Treatment appears in FNA Volume 23. Treatment on page 127. Mentioned on page 122, 125.

Plants annual, cespitose, delicate, 4–15 cm, bases soft; rhizomes absent. Leaves polystichous, mostly spreading or excurved, often exceeding culms; sheaths entire, abaxially smooth or sparsely hirtellous; ligule absent; blades filiform, to 0.5 mm wide, somewhat involute, abaxially glabrous or ascending-strigillose. Inflorescences terminal; spikelets sessile or subsessile in single capitate leafyinvolucrate cluster; scapes filiform; involucral-bracts leafy, setaceous, greatly overtopping inflorescence. Spikelets greenish, cylindric to lanceoloid-cylindric, 5–10 mm; fertile scales narrowly ovate to lanceolate, 1–1.5 mm, acute, glabrous, midrib strong, excurrent as cusp. Flowers: stamens 1; styles 2-fid, slender, bulbous-based, smooth or papillate. Achenes pale, tumidly obovoid, 0.5–0.7 mm, cancellate, pits horizontally rectangular in 5–7 vertical rows per side. 2n = 20.


Phenology: Fruiting summer–fall.
Habitat: Moist to wet, alluvial or mineralized banks, shores, fluctuating pond and lake edges, often a “drawdown” plant around stock tanks and reservoirs
Elevation: 0–500 m

Distribution

V23 195-distribution-map.jpg

Ala., Ariz., Ark., Calif., Fla., Ga., Ill., Kans., Ky., La., Miss., Mo., Nebr., Okla., S.C., Tenn., Tex., Mexico, Central America, South America

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Fimbristylis vahlii"
reticulate-honeycombed +
Robert Kral +
(Lamarck) Link +
shortened +
deciduous +
enlarged +
Scirpus vahlii +
ascending-strigillose +  and glabrous +
filiform +
0mm;0.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
3-5-angled +, compressed +  and terete +
Ala. +, Ariz. +, Ark. +, Calif. +, Fla. +, Ga. +, Ill. +, Kans. +, Ky. +, La. +, Miss. +, Mo. +, Nebr. +, Okla. +, S.C. +, Tenn. +, Tex. +, Mexico +, Central America +  and South America +
0–500 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist to wet, alluvial or mineralized banks, shores, fluctuating pond and lake edges, often a “drawdown” plant around stock tanks and reservoirs +
interrupted +  and continuous +
compound +  and simple +
erect +  and spreading +
polystichous +
excurved +
with (1-)3-6(-30) bristles and/or scales +
Fruiting summer–fall. +
2-3(-4)-carpellate +
rectangular +
3 (?) +  and 1 (?) +
Hort. Berol. +
adventitious +
basal +  and proximal +
acute;narrowly ovate;lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
filiform +
hirtellous +  and smooth +
cylindric +
Illustrated +
subsessile +  and sessile +
single +, 1 +  and 80 +
cylindric;lanceoloid-cylindric +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
bulbous-based +
papillate +  and smooth +
slender +
Fimbristylis apus +, Fimbristylis congesta +, Fimbristylis vincentii +, Isolepis vahlii +  and Scirpus apus +
Fimbristylis vahlii +
Fimbristylis +
species +
not +  and rhizomatous +
plant +  and cespitose +