Eleocharis sect. Eleogenus
in G. Bentham and J. D. Hooker, Gen. Pl. 3: 1047. 1883.
Treatment appears in FNA Volume 23.
Plants annual or perennial, never stoloniferous, sometimes with creeping rhizomes 0.5–1 mm thick, tubers absent. Culms terete, to 90 cm × 2 mm. Leaves: distal leaf-sheaths usually persistent, thinly membranous to papery. Spikelets terete, to 13 × 4 mm. Flowers: styles 2-fid or with to ca. 1/2 3-fid. Achenes biconvex or rarely to ca. 1/2 trigonous; angles keeled (costate), at least distally. Tubercles distinct from achene apex in color, texture, and form.
Distribution
Worldwide, primarily New World temperate regions
Discussion
Species 18 (9 in the flora).
Selected References
None.
"shortened" is not a number.
... more about "Eleocharis sect. Eleogenus"
trigonous;rarely;biconvex +
keeled +
basifixed +
persistent +
absent +
1;many +
2;3 +
internal +
terete +
spongy +
persistent +
basal +
abundant +
single +
bisexual +
pseudoumbel +
modified +
absent +
basal +
absent +
fused +
flattened +
falling +
absent +
with (1-)3-6(-30) bristles and/or scales +
thin +
2-3(-4)-carpellate +
fused +
pistillate +
subtending +
stramineous;medium brown or red brown or blackish brown +
in G. Bentham and J. D. Hooker, Gen. Pl. +
1883 +
creeping +
caudex-like +
adventitious +
fibrous +
empty +
arranged +
4;500 +
fertile +
2-keeled +
incomplete +
transverse +
cylindric +
single +
terete +
0mm;4mm +
distinct +
papillate +
undivided +
Eleocharis sect. Eleogenus +
Eleocharis +
section +
free +
thin +
absent +
distinct +
stoloniferous +
5;100 +