Carex heterostachya

Bunge

Enum. Pl. China Bor., 69. 1833.

IntroducedIllustrated
Synonyms: Carex ×fulleri H. E. Ahles
Treatment appears in FNA Volume 23. Treatment on page 494. Mentioned on page 492, 493.

Plants colonial; rhizomes long-creeping. Culms central, slender, trigonous, 25–60 cm, papillose and scabrous-angled distally. Leaves: basal sheaths brown, bladeless, rapidly disintegrating into fibers; ligules 0.7–1.5 mm, wider than long; blades somewhat glaucous, M-shaped, 1.5–3.2 mm wide, papillose abaxially. Inflorescences 2.5–12 cm; rachis beyond proximal pistillate spikes sharp-angled, often finely scabrous; proximal (1–) 2–3 (–4) spikes pistillate, not or barely overlapping, ascending; distal spikes erect; terminal 1 spike staminate. Pistillate scales ovate to broadly ovate, apex acute to acuminate-awned, awn to 1.3 mm, glabrous. Perigynia ascending, essentially veinless except for 2 marginal veins, ovoid, 3.1–4.5 × 1.7–2.5 mm, glabrous; beak 0.4–0.8 mm, bidentulate, teeth straight, 0.2–0.3 mm.


Phenology: Fruiting Jun–Jul.
Habitat: Dry, open or lightly shaded areas
Elevation: 200 m

Discussion

Carex heterostachya is a rare introduction from eastern Asia; first discovered in 1949, it is still extant and slowly spreading at its only known North American location (A. A. Reznicek 1994).

Selected References

None.

Lower Taxa

None.

"lengthofbody" is not declared as a valid unit of measurement for this property.

... more about "Carex heterostachya"
trigonous +
smaller +
pubescent +  and glabrous +
A. A. Reznicek +  and Paul M. Catling +
0 cm0 mm <br />0 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
shortened +
rounded +
bidentulate +
straight +
emarginate +  and bidentate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
papillose +
m--shaped +
1.5mm;3.2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
involute +  and channeled +
red tinged +
papillose +
scabrous-angled +  and trigonous +
slender +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
with awn +  and acuminate +
Ill. +  and e Asia +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry, open or lightly shaded areas +
2.5 cm25 mm <br />0.025 m <br /> (12 cm120 mm <br />0.12 m <br />) +
staminate +, prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
pubescent;,;glabrous +
septate-nodulose +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
wider than long +
with (1-)3-6(-30) bristles and/or scales +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Fruiting Jun–Jul. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Enum. Pl. China Bor., +
adventitious +
basal +  and proximal +
ovate;broadly ovate +
ladder-fibrillose +
shorter or longer +
septate-nodulose +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Introduced +  and Illustrated +
staminate +  and pistillate +
overlapping +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
Carex ×fulleri +
Carex heterostachya +
Carex sect. Paludosae +
species +
straight +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
plant +  and colonial +