Eleocharis lanceolata

Fernald

Proc. Amer. Acad. Arts 34: 493, figs. 27–29. 1899.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 104. Mentioned on page 64, 105.

Culms 20–35 cm × 0.3–1 mm. Leaves: apex of distal leaf-sheath subacute to narrowly acute, tooth to 0.3 (–1.1) mm. Spikelets narrowly lanceoloid, 3–12 × (1–) 2–2.5 (–4) mm, apex acute; floral scales 25–100, 10–12 per mm of rachilla, orangebrown to stramineous, ovate, 1.5–2 × 1 mm, midribs mostly keeled, apex acute or narrowly rounded in proximal part of spikelet. Flowers: perianth bristles 6–7, brown, stout, the longest equaling or exceeding tubercle; stamens 2–3; anthers brown, 0.3 mm; styles 2-fid. Achenes 0.9–1.1 × 0.6–0.8 mm. Tubercles deltoid, 0.25–0.5 × 0.5–0.7 mm, 1/2–2/3 as high as wide, 1/4–1/2 as high and 2/3–4/5 as wide as achene. 2n = 10.


Phenology: Fruiting summer to fall.
Habitat: Fresh shores, stream beds, pine woods, disturbed places
Elevation: 0–400 m

Distribution

V23 157-distribution-map.jpg

Ark., Calif., Kans., La., Mo., Okla., Tenn., Tex.

Discussion

Some collections of Eleocharis lanceolata from Tennessee appear to be intermediate with E. obtusa. The California record is an introduced rice-field weed collected in 1949.

Selected References

None.

Lower Taxa

None.
... more about "Eleocharis lanceolata"
dark-brown +  and stramineous +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
biconvex +
wide;0.6mm;0.8mm +
0.3 cm3 mm <br />0.003 m <br /> (?) +
not constricted +
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 +
20 cm200 mm <br />0.2 m <br /> (35 cm350 mm <br />0.35 m <br />) +
0.3mm;1mm +
green +  and stramineous +
Ark. +, Calif. +, Kans. +, La. +, Mo. +, Okla. +, Tenn. +  and Tex. +
0–400 m +
orangebrown +  and stramineous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
hypogynous +  and subtending +
biconvex +  and trigonous +
Fresh shores, stream beds, pine woods, disturbed places +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
flattened +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
exceeding tubercle +  and equaling +
with (1-)3-6(-30) bristles and/or scales +
Fruiting summer to fall. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
stramineous;medium brown or red brown or blackish brown +
Proc. Amer. Acad. Arts +
ascending +  and horizontal +
caudex-like +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
adventitious +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +  and Endemic +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
lanceoloid +
2mm;2.5mm +
2 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
Eleocharis +
Eleocharis lanceolata +
Eleocharis (sect. Eleogenus) ser. Ovatae +
species +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
0.25mm;0.5mm +
1/2 +  and 2/3 +
0.5mm +  and 0.7mm +