Carex amplectens

Mackenzie

Bull. Torrey Bot. Club 43: 611. 1917.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 361. Mentioned on page 341, 344, 360.

Plants densely cespitose. Culms (30–) 50–90 cm. Leaves: sheaths sometimes adaxially brownish tinged, summits rounded to acute, usually prolonged to 1–5 mm beyond collar; distal ligules 1.5–4.5 mm, often shorter than sheath summits; blades (3–) 4–5 (–7) per fertile culm, 20–45 cm × 3–5 (–6.5) mm. Inflorescences open, usually dense distally, green, silvery, or pale gold, 4–6.5 cm × 10–18 mm; proximal internode (7–) 10–20 mm; 2d internode 4–8.5 mm; proximal bracts leaflike or bristlelike, if leaflike then much longer than inflorescence, base usually surrounding culm. Spikes (6–) 10–20, distant, distinct, obovoid, or sometimes lanceoloid to ovoid, (12–) 14–17 × 5–8 mm, base usually attenuate, apex rounded or acute. Pistillate scales white-hyaline with conspicuous green midstripe, sometimes tinged pale gold, ovate, 3.5–5.5 mm, shorter and narrower than or ± equaling perigynia, base curved around perigynia, apex acute to awned. Perigynia appressed-ascending to ascending-spreading, whitish green to pale gold, conspicuously (6–) 8–11-veined abaxially, conspicuously or, occasionally, faintly 4–8-veined adaxially, veins more than 2/3 achene length, at least 3 adaxial veins longer than achene, ovate, planoconvex, (3.5–) 4–5.2 × 1.5–1.8 mm, 0.6–0.8 mm thick, margin flat, including wing 0.15–0.3 (–0.4) mm wide, usually curved toward adaxial surface of perigynia, ciliate-serrulate at least distally; beak green, gold, or white at tip, flat, ± ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene (1.8–) 2–3 mm. Achenes ovate, elliptic, oblong or obovate, 1.8–2 × 1.1–1.3 mm, 0.6–0.7 mm thick.


Phenology: Fruiting mid–late summer.
Habitat: Meadows, open forests, moist to dry soils
Elevation: 1200–2100 m

Discussion

Carex amplectens has characters of C. specifica and of C. fracta. It has been collected rarely across a few, scattered localities in the Cascade Mountains and the Sierra Nevada and is poorly understood.

Selected References

None.

Lower Taxa

None.

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

... more about "Carex amplectens"
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
obovate;oblong;elliptic;ovate +
smaller +
0.6mm +  and 0.7mm +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Mackenzie +
shortened +
persistent +
attenuate +
not enlarged +
ciliate-serrulate +
White (?) +, Gold (?) +  and Green (?) +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
20 cm200 mm <br />0.2 m <br /> (45 cm450 mm <br />0.45 m <br />) +
4 (?) +  and 5 (?) +
v--shaped +
3mm;5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
50 cm500 mm <br />0.5 m <br /> (90 cm900 mm <br />0.9 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
1200–2100 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Meadows, open forests, moist to dry soils +
pale gold +, silvery +  and green +
0.4 cm4 mm <br />0.004 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.15mm +  and 0.3mm +
with (1-)3-6(-30) bristles and/or scales +
4-8-veined +  and (6-)8-11-veined +
whitish green +  and pale gold +
appressed-ascending +  and ascending-spreading +
Fruiting mid–late summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
bristlelike +  and leaflike +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Bull. Torrey Bot. Club +
adventitious +
gold +, tinged pale +  and white-hyaline +
basal +  and proximal +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
shorter and narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
distinct +
1.4 cm14 mm <br />0.014 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
lanceoloid;ovoid +
0.5 cm5 mm <br />0.005 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 +
rounded +  and acute +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Carex amplectens +
Carex sect. Ovales +
species +
/3 +  and 2 +
plant +  and cespitose +