Eleocharis cylindrica

Buckley

Proc. Acad. Nat. Sci. Philadelphia 14: 10. 1863.

IllustratedConservation concern
Synonyms: Eleocharis texana Britton
Treatment appears in FNA Volume 23. Treatment on page 81. Mentioned on page 66, 82.

Plants perennial; rhizomes evident, 1 mm thick, firm, cortex unknown, internodes unknown, scales fugacious, 5 mm, membranous. Culms terete, often with a few blunt ridges when dry, 20–50 cm × 0.2–0.7 mm, soft, spongy. Leaves: distal leaf-sheaths persistent, not splitting, proximally red or stramineous, distally green, membranous, apex usually reddish, subtruncate to obtuse, not callose, tooth present, to 0.4 mm. Spikelets narrowly lanceoloid, narrowly ovoid, or narrowly cylindric, 4–10 × 1–1.5 mm, apex narrowly acute; proximal scale amplexicaulous or clasping 3/4 of culm, entire; subproximal scale empty or with flower; floral scales spreading in fruit, 20–80, 5–6 per mm of rachilla, orangebrown, midrib regions stramineous, narrowly ovatelanceolate, 1.5–2 × 0.8 mm, entire, apex acute, not carinate. Flowers: perianth bristles 3–6, stramineous, stout, unequal, rudimentary to less than 1/2 achene length; stamens 3; anthers stramineous, 0.7–1.4 mm; styles 3-fid. Achenes falling with scales, stramineous, ellipsoid, compressedtrigonous, angles prominent (keeled), 0.6–0.65 × 0.4–0.45 mm, base narrowed, neck long, smooth at 40X. Tubercles brown, pyramidal, as high as wide to greatly depressed, 0.1–0.25 × 0.15–0.2 mm.


Phenology: Fruiting spring–summer.
Habitat: Ephemeral pools in old rock quarry
Elevation: 300 m

Distribution

V23 109-distribution-map.jpg

Tex., South America (Argentina), South America (Paraguay)

Discussion

Eleocharis cylindrica is synonymous with E. spegazzinii Barros, which was described from temperate South America (E. R. Guaglianone and O. Ueno 1990). It is very uncommon in North America, where it has been confirmed from Aransas, Burnet, and Cameron counties in Texas; reports from Lubbock and Presidio counties have not been confirmed. The report from New Mexico cannot be confirmed because the specimens lack achenes.

Selected References

None.

Lower Taxa

None.
... more about "Eleocharis cylindrica"
stramineous +
cancellate or reticulate +  and rugulose +
ellipsoid +
color +  and texture +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.065 cm0.65 mm <br />6.5e-4 m <br />) +
0.4mm;0.45mm +
stramineous +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
not callose +
S. Galen Smith* +, Jeremy J. Bruhl* +, M. Socorro González-Elizondo* +  and Francis J. Menapace* +
Buckley +
flattened +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
shortened +
persistent +
narrowed +
enlarged +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
0.3mm;5mm +
green +, stramineous +  and red +
Tex. +, South America (Argentina) +  and South America (Paraguay) +
membranous +  and thinly papery +
hypogynous +  and subtending +
biconvex +  and trigonous +
Ephemeral pools in old rock quarry +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
ovatelanceolate +
0.8 cm8 mm <br />0.008 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–summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
clasping +  and amplexicaulous +
stramineous;medium brown or red brown or blackish brown +
Proc. Acad. Nat. Sci. Philadelphia +
ascending +  and horizontal +
caudex-like +
1 cm10 mm <br />0.01 m <br /> (?) +
20cm;50cm +
0.2mm;0.7mm +
adventitious +
fugacious +
basal +  and proximal +
2-keeled +
5 cm50 mm <br />0.05 m <br /> (?) +
membranous +
cylindric +
Illustrated +  and Conservation concern +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cylindric;ovoid;cylindric;ovoid;lanceoloid +
1mm;1.5mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
with flower +  and empty +
Eleocharis texana +
Eleocharis cylindrica +
Eleocharis (sect. Eleocharis) ser. Eleocharis +
species +
0 cm0 mm <br />0 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.1mm;0.25mm +
depressed +  and pyramidal +
0.15mm +  and 0.2mm +