Eleocharis nitida

Fernald

Rhodora 8: 129. 1906.

Common names: Neat spike-rush éléocharide brillante
IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 86. Mentioned on page 68, 87.

Plants perennial, mat-forming; rhizomes evident, 0.3–0.5 mm thick, hard, cortex persistent, longer internodes 2 mm, scales persistent or fugaceous, 2–3 mm, membranous to papery, slightly fibrous. Culms terete, 2–15 cm × 0.15–0.3 mm, firm to soft. Leaves: distal leaf-sheaths persistent, not splitting, proximally stramineous to reddish, distally green or stramineous to reddish, membranous, apex often red, obtuse to acute, tooth absent. Spikelets ovoid, 1–4 × 1–2 mm, obtuse to acute; proximal scale amplexicaulous, apex entire; subproximal scale with flower; floral scales spreading in fruit, 5–30, 8 per mm of rachilla, medium to very dark-brown, midrib region often pale or greenish, broadly ovate, 1–1.3 × 1 mm, apex rounded, entire, not carinate. Flowers: perianth bristles absent; stamens 3; anthers yellow, 0.3 mm; styles 3-fid. Achenes persistent after scales fall, to dark yellow-orange or brown, broadly obpyriform, trigonous, angles evident, 0.6–0.65 × 0.5–0.55 mm, rugulose at 20–30X, 20 blunt horizontal ridges in each vertical series. Tubercles brown, greatly depressed, rudimentary, 0.05–15 × 0.15–0.3 mm.


Phenology: Fruiting late spring (Jun)–summer.
Habitat: Fresh bog pools, streams, disturbed places
Elevation: 30–400 m

Distribution

V23 118-distribution-map.jpg

Nfld. and Labr., N.S., Ont., Que., Sask., Alaska, Mich., Minn., N.H., Wis.

Discussion

Eleocharis nitida is much like E. elliptica but all structures are smaller; intermediates are unknown.

Selected References

None.

Lower Taxa

None.
... more about "Eleocharis nitida"
greenish +, brown +, orange +  and yellow +
persistent +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.065 cm0.65 mm <br />6.5e-4 m <br />) +
terete;trigonous;biconvex +
color +  and texture +
0.5mm;0.55mm +
brown +  and dark yellow-orange +
0.3 cm3 mm <br />0.003 m <br /> (?) +
S. Galen Smith* +, Jeremy J. Bruhl* +, M. Socorro González-Elizondo* +  and Francis J. Menapace* +
Fernald +
flattened +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
shortened +
persistent +
enlarged +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
Neat spike-rush +  and éléocharide brillante +
persistent +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
firm;soft +
0.15mm;0.3mm +
proximally stramineous +  and reddish distally green or stramineous +
Nfld. and Labr. +, N.S. +, Ont. +, Que. +, Sask. +, Alaska +, Mich. +, Minn. +, N.H. +  and Wis. +
30–400 m +
membranous +  and thinly papery +
hypogynous +  and subtending +
biconvex +  and trigonous +
Fresh bog pools, streams, disturbed places +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
2 cm20 mm <br />0.02 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
flattened +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
Fruiting late spring (Jun)–summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
stramineous;medium brown or red brown or blackish brown +
ascending +  and horizontal +
caudex-like +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
adventitious +
fugaceous +  and persistent +
basal +  and proximal +
2-keeled +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
fibrous +, membranous +  and papery +
cylindric +
Illustrated +  and Endemic +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
obtuse;acute +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
Eleocharis +
Eleocharis nitida +
Eleocharis (sect. Eleocharis) ser. Eleocharis +
species +
0.05mm;15mm +
depressed +
0.15mm +  and 0.3mm +
plant +  and mat-forming +