Carex gynodynama

Olney

Proc. Amer. Acad. Arts 7: 394. 1868.

Common names: Olney’s hairy sedge
IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 472. Mentioned on page 463, 468.

Plants densely cespitose. Culms reddish-brown to dark maroon at base; flowering-stems 20–70 cm, much longer than leaves at maturity, 1–1.7 mm thick, glabrous or sparsely pilose. Leaves: basal sheaths reddish-brown, bladeless, pilose; others grading from dark red to green on back, tan-hyaline on front, reddish-brown dotted and usually pubescent at apex; blades flat, 3–12 mm wide, usually pilose, more densely so abaxially, margins ciliate. Inflorescences: peduncles of lateral spikes, when present, less than 10 mm, often pubescent; proximal bracts usually shorter than inflorescence; sheaths 5–50 mm; blades 1.2–2 mm wide. Lateral spikes 2–5, 1 per node, usually crowded toward apex and overlapping staminate spike, erect, sessile or pedunculate, pistillate with 20–40 perigynia attached less than 1 mm apart, cylindric, 12–40 × 4–11 mm. Terminal spike staminate, rarely gynecandrous, sessile or very short-pedunculate, 8–30 × 2–5.5 mm. Pistillate scales reddish-brown with narrow white-hyaline margins and green midrib, broadly ovate, shorter than mature perigynia, apex obtuse to short-cuspidate, often pubescent on midrib and awn, ciliate distally. Perigynia pale green, blotched with dark maroon at base, dark maroon-brown distally, 2-ribbed and finely veined with to 20 veins, most conspicuous near base, loosely enveloping achene, ellipsoid, 3.7–5.3 × 1–2.2 mm, membranous, base acute, apex narrowing to beak, body covered with long, appressed to spreading hairs; beak bidentate, 1 mm. Achenes substipitate, 2–2.6 × 1.2–1.7 mm. 2n = 50, 52.


Phenology: Fruiting late spring–early summer.
Habitat: Seeps, stream banks, roadside ditches, wet meadows and slopes, coastal prairies, mixed evergreen forest along the Pacific Coast
Elevation: 0–600 m

Discussion

Sporadic sterile hybrids between Carex gynodynama and C. mendocinensis are well documented. A reported hybrid with C. hendersonii needs further study to confirm parentage.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Carex gynodynama"
0.2 cm2 mm <br />0.002 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
trigonous +
1.2mm;1.7mm +
narrowing +
Marcia J. Waterway +
shortened +
Hymenochlaenae +
1/2 length of body +
bidentate +
1 cm10 mm <br />0.01 m <br /> (?) +
m--shaped +
1.2mm;2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Olney’s hairy sedge +
reddish-brown +  and dark maroon +
round +  and trigonous +
Calif. +  and Oreg. +
0–600 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
20 cm200 mm <br />0.2 m <br /> (70 cm700 mm <br />0.7 m <br />) +
biconvex +  and trigonous +
Seeps, stream banks, roadside ditches, wet meadows and slopes, coastal prairies, mixed evergreen forest along the Pacific Coast +
appressed +  and spreading +
pistillate +, pedunculate +  and sessile +
apart +  and crowded +
1.2 cm12 mm <br />0.012 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white-hyaline +
entire +  and bidentate +
reddish-brown dotted +, tan-hyaline +, dark red +  and green +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
dark maroon-brown +, dark maroon +, blotched +  and pale green +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
ascending +  and erect +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
, +, suffused with maroon or suffused with chestnut-brown +, white +  and hyaline +
3 (?) +  and 1 (?) +
Proc. Amer. Acad. Arts +
adventitious +
reddish-brown +
basal +  and proximal +
cylindric +
0.5 cm5 mm <br />0.005 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Illustrated +  and Endemic +
overlapping +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex gynodynama +
Carex sect. Hymenochlaenae +
species +
short-pedunculate +, sessile +  and staminate +
0.2 cm2 mm <br />0.002 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0 +  and 20 +
plant +  and cespitose +
pubescent +  and glabrous +
not septate-nodulose +