Carex haydeniana

Olney in S. Watson

in S. Watson, Botany (Fortieth Parallel), 366. 1871.

IllustratedEndemic
Synonyms: Carex macloviana subsp. haydeniana (Olney) Roy L. Taylor & MacBryde Carex nubicola Mackenzie
Treatment appears in FNA Volume 23. Mentioned on page 352.

Plants densely cespitose. Culms 9–30 (–40) cm. Leaves: sheaths adaxially white-hyaline, sometimes cross-corrugate adaxially, summits usually U-shaped, sometimes prolonged to 3 mm beyond collar; distal ligules 0.3–2 mm; blades 3–4 (–5) per fertile culm, 3–16 cm × 1.5–4 mm. Inflorescences dense, dark-brown, green and brown, or gold, 1.1–2.1 cm × 13–18 mm; proximal internode 1–2.5 (–3.4) mm; 2d internode 0.5–2 mm; proximal bracts scalelike, shorter than inflorescences. Spikes 5–7 (–9), aggregated, individually indistinct broadly ovoid, 6.5–10 × 4.5–8 mm, base and apex usually rounded. Pistillate scales reddish or coppery to dark-brown, sometimes with whitish or pale gold midstripe, narrowly ovate to ovate, 3–4.8 mm, shorter and narrower than perigynia, apex acute to obtuse. Perigynia ascending to ascending-spreading, light-brown to coppery or dark-brown, conspicuously 0–3 (–8) -veined adaxially, lanceovate to broadly ovate, flat except over achene, 4–6.5 × 1.5–2.6 mm, 0.3–0.5 mm thick, margin flat, including wing 0.3–0.6 (–0.8) mm wide, ciliate-serrulate at least on distal body; beak dark-brown to black, white-hyaline at tip, cylindric, unwinged, at least 1 mm, ± entire for 0.3–0.6 mm, abaxial suture inconspicuous or with conspicuous white margin, distance from beak tip to achene (2.3–) 2.6–3.8 mm. Achenes elliptic or ovate, (1.2–) 1.4–1.8 × 0.8–1.1 (–1.3) mm, 0.3–0.45 mm thick. 2n = 82.


Phenology: Fruiting summer.
Habitat: Rocky or gravelly subalpine to alpine meadows, slopes, stream banks
Elevation: 1700–4300 m

Distribution

V23 610-distribution-map.jpg

Alta., B.C., Calif., Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.

Discussion

See comment under 110. Carex microptera.

Selected References

None.

Lower Taxa

None.

"+timesaslongasinflorescences" is not declared as a valid unit of measurement for this property."not undefined" is not a number.

... more about "Carex haydeniana"
with conspicuous white margin +  and inconspicuous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
ovate;elliptic +
smaller +
0.3mm +  and 0.45mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Olney in S. Watson +
shortened +
persistent +
rounded +
not enlarged +
cylindric +
1 cm10 mm <br />0.01 m <br /> (?) +
3 cm30 mm <br />0.03 m <br /> (16 cm160 mm <br />0.16 m <br />) +
3 (?) +  and 4 (?) +
v--shaped +
1.5mm;4mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
9 cm90 mm <br />0.09 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Alta. +, B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1700–4300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Rocky or gravelly subalpine to alpine meadows, slopes, stream banks +
gold +, punct +, green and brown +  and dark-brown +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
conspicuous +
0.3mm +  and 0.6mm +
pale gold +  and whitish +
with (1-)3-6(-30) bristles and/or scales +
light-brown +  and coppery or dark-brown +
ascending +  and ascending-spreading +
0.3mm +  and 0.5mm +
Fruiting summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
in S. Watson, Botany (Fortieth Parallel), +
adventitious +
coppery +  and dark-brown +
basal +  and proximal +
narrowly ovate;ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
shorter and narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
0.65 cm6.5 mm <br />0.0065 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
prolonged +
u--shaped +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Carex macloviana subsp. haydeniana +  and Carex nubicola +
Carex haydeniana +
Carex sect. Ovales +
species +
plant +  and cespitose +