Eleocharis tenuis var. pseudoptera

(Weatherby) Svenson

Rhodora 41: 65. 1939.

Common names: Éléocharide à tige ailée
IllustratedEndemic
Basionym: Eleocharis capitata var. pseudoptera Weatherby Rhodora 34: 202, plate 221, figs. 3, 16. 1932
Synonyms: Eleocharis elliptica var. pseudoptera (Weatherby) L. J. Harms
Treatment appears in FNA Volume 23. Treatment on page 88. Mentioned on page 86, 87.

Rhizomes 1–2 mm thick, longer internodes 5–10 mm, scales sometimes decaying to fibers. Culms sharply 4– (5–6) -angled, often deeply sulcate and thus “winged,” to 0.8 mm wide. Leaves: distal leaf-sheaths usually with stout apical tooth 0.4–0.6 (–0.9) mm. Achenes usually lemon yellow to dark yellow, nearly equilaterally trigonous, usually cancellate at 10X, with 10–14 obscure to clearly evident depressions in each vertical series. Tubercles mostly greatly depressed, much lower than wide. 2n = 38, 39.


Phenology: Fruiting spring (Mar–Apr) in South, early summer (Jun–Jul) in North.
Habitat: Wet, fresh, often calcareous meadows, swales, springy places, woods, prairie, serpentine barrens, ditches
Elevation: 10–300 m

Distribution

V23 122-distribution-map.jpg

N.S., Que., Conn., Del., D.C., Ga., Ind., Ky., La., Md., Miss., N.J., N.Y., N.C., Pa., Tenn., Vt., Va.

Discussion

I have not seen voucher specimens for the chromosome count by L. J. Harms (1972) for Eleocharis elliptica var. pseudoptera.

Selected References

None.

Lower Taxa

None.
usually lemon yellow +  and dark yellow +
cancellate or reticulate +  and rugulose +
trigonous +
color +  and texture +
green +, brown +, medium +, dark yellow +  and lemon yellow +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
prominent +  and evident +
alveolate +  and rugulose +
0.45mm;0.7mm +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
S. Galen Smith* +, Jeremy J. Bruhl* +, M. Socorro González-Elizondo* +  and Francis J. Menapace* +
(Weatherby) Svenson +
flattened +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
shortened +
persistent +
enlarged +
Eleocharis capitata var. pseudoptera +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
Éléocharide à tige ailée +
persistent +
winged +  and sulcate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
5 cm50 mm <br />0.05 m <br /> (90 cm900 mm <br />0.9 m <br />) +
4-(5-6)-angled +
firm;soft +
0mm;0.8mm +
obscure +  and clearly evident +
red +, stramineous +, green +  and dark red +
N.S. +, Que. +, Conn. +, Del. +, D.C. +, Ga. +, Ind. +, Ky. +, La. +, Md. +, Miss. +, N.J. +, N.Y. +, N.C. +, Pa. +, Tenn. +, Vt. +  and Va. +
10–300 m +
membranous +  and thinly papery +
hypogynous +  and subtending +
biconvex +  and trigonous +
Wet, fresh, often calcareous meadows, swales, springy places, woods, prairie, serpentine barrens, ditches +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 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 spring (Mar–Apr) in South, early summer (Jun–Jul) in North. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
stramineous;medium brown or red brown or blackish brown +
ascending +  and horizontal +
caudex-like +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
adventitious +
green +, brown +, medium +, dark yellow +  and lemon yellow +
decaying to fibers +  and persistent +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
basal +  and proximal +
prominent +  and evident +
rugulose +
trigonous;obpyriform +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
papery +  and finely coarsely fibrous +
0.45mm;0.7mm +
cylindric +
Illustrated +  and Endemic +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1.5mm;2mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
Eleocharis elliptica var. pseudoptera +
Eleocharis tenuis var. pseudoptera +
Eleocharis tenuis +
variety +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
0.05mm;0.3mm +
much lower than wide +
depressed +
0.25mm +  and 0.4mm +
plant +  and mat-forming +