Carex helleri

Mackenzie

Erythea 8: 70, fig. 38. 1922.

IllustratedEndemic
Synonyms: Carex atrata var. nigra W. Boott
Treatment appears in FNA Volume 23. Treatment on page 411. Mentioned on page 402, 410.

Plants densely cespitose. Culms 5–30 cm, proximally scabrous. Leaves 2–3 mm wide. Inflorescences: proximal bracts shorter than or exceeding inflorescences; spikes overlapping, erect, elongate, sessile or short-pendunculate, contiguous, forming dense terminal cluster or separate, 10–20 × 5–7 mm; lateral 2–3 spikes pistillate; terminal spike gynecandrous. Pistillate scales dark-brown or black to margins, lanceolate, 1–2 times as long as and narrower than perigynia, midvein lighter colored than body, conspicuous, frequently raised, prominent, apex acute or acuminate, mucronate. Perigynia ascending, dark-brown or purple-black with green or yellowish-brown margins, veinless, elliptic or obovate, 2.5–3 × 2–3 mm, apex gradually or abruptly beaked, distal margins smooth; beak 0.25–0.3 mm, bidentate, smooth. Achenes filling proximal 1/2 or less of perigynia.


Phenology: Fruiting Jul–Aug.
Habitat: Rocky slopes
Elevation: 2900–3800 m

Discussion

Selected References

None.

Lower Taxa

None.

"-2timesaslongasandnarrowerthanperigynia" is not declared as a valid unit of measurement for this property.

... more about "Carex helleri"
trigonous +
smaller +
papillose +  and smooth +
David F. Murray +
Mackenzie +
shortened +
cuneate +  and more or less rounded +
bidentate +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
papillose +  and smooth +
red +  and purple +
round +  and trigonous +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Calif. +  and Nev. +
2900–3800 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Rocky slopes +
prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
yellowish-brown +  and green +
lighter colored +
prominent +, raised +  and conspicuous +
with (1-)3-6(-30) bristles and/or scales +
purple-black +  and dark-brown +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Fruiting Jul–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
scale-like;,;thread-like +
ladder-fibrillose +  and veined +
purple +, tinged red +  and dotted +
black without yellowbrown +  and brown +
adventitious +
black +  and dark-brown +
basal +  and proximal +
lanceolate +
cylindric +
Illustrated +  and Endemic +
pistillate +, short-pendunculate +  and sessile +
separate +, cluster +, contiguous +  and overlapping +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
elongate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
2 +  and 3 +
papillate +
deciduous +
2-3(-4)-fid +
Carex atrata var. nigra +
Carex helleri +
Carex sect. Racemosae +
species +
pistillate +  and staminate +
stoloniferous +, rhizomatous +  and long +
plant +  and cespitose +