Websteria confervoides

(Poiret) S. S. Hooper

Kew Bull. 26: 582. 1972.

Illustrated
Basionym: Scirpus confervoides Poiret in J. Lamarck et al., Encycl. 6: 755. 1805
Synonyms: Rhynchospora ruppioides Bentham Scirpus submersus C. Wright Websteria limnophila S. H. Wright Websteria submersa (C. Wright) Britton
Treatment appears in FNA Volume 23. Treatment on page 121. Mentioned on page 91.

Culms: primary ones pale green, 175 cm × 0.6 mm; stems green, 10 cm × 0.05 mm. Leaves: sheaths pale-brown or redbrown, 7–10 mm. Spikelets: scales pale-brown to green with red or purple marks, midvein colorless or green, lanceolate, 5–12 × 0.5–1.6 mm, margins scarious. Achenes pale-brown to redbrown, ellipsoid, 2 × 1.2–1.5 mm; beak 1.4–2 × 0.2–0.3 mm.


Phenology: Fruiting fall.
Habitat: Lakes
Elevation: 0–50 m

Distribution

V23 185-distribution-map.jpg

Fla., Ga., West Indies, Central America, South America, Asia (India), Asia (Malesia), Asia (Sri Lanka), Africa (including Madagascar), n Australia

Discussion

Sterile aquatic specimens of several species of Eleocharis have been confused with Websteria confervoides. Sterile specimens of W. confervoides can be recognized, with some confidence, by their pale, relatively stout main stems with numerous, very slender green branches, the somewhat enlarged nodes, long (to 11 mm) bracts subtending branches, and the usually reddish abscission zone of the bracts. Correctly identified specimens have been seen only from Florida and Georgia.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Websteria confervoides"
pale-brown +  and redbrown +
2 cm20 mm <br />0.02 m <br /> (?) +
ellipsoid +
1.2mm;1.5mm +
Jeremy J. Bruhl +
(Poiret) S. S. Hooper +
enlarged +
Scirpus confervoides +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
many-stemmed +
pale green +
175 cm1,750 mm <br />1.75 m <br /> (?) +
Fla. +, Ga. +, West Indies +, Central America +, South America +, Asia (India) +, Asia (Malesia) +, Asia (Sri Lanka) +, Africa (including Madagascar) +  and n Australia +
0–50 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Lakes +
cauline +  and basal +
scale-like +  and tubular +
purple +  and red +
green +  and colorless +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
lanceolate +
0.5mm;1.6mm +
curved +  and straight +
with (1-)3-6(-30) bristles and/or scales +
Fruiting fall. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
pale-brown +  and green +
2-keeled +
cylindric +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Illustrated +
septate +, hollow +  and solid +
10 cm100 mm <br />0.1 m <br /> (?) +
compressed +, terete +  and trigonous +
papillate +
persistent +
Rhynchospora ruppioides +, Scirpus submersus +, Websteria limnophila +  and Websteria submersa +
Websteria confervoides +
Websteria +
species +
herb +  and not cespitose +