Carex constanceana

Stacey

Leafl. W. Bot. 2: 123. 1938.

Treatment appears in FNA Volume 23. Treatment on page 359. Mentioned on page 343, 357.

Plants densely cespitose. Culms 25–35 cm. Leaves: sheaths adaxially white-hyaline, summits U-shaped or rounded, sometimes prolonged beyond collar and rounded; distal ligules 1–3 mm; blades (2–) 3–5 per fertile culm, 4–15 cm × 2–3 mm. Inflorescences open, orangebrown or greenish, 2.5–4 cm × 13–15 mm; proximal internode 6–12 mm; 2d internode 2–6 mm; proximal bracts scalelike or bristlelike, shorter than inflorescences. Spikes 3–7, distant, distinct, oblanceloid to obovoid, 14–21 × 7–10 mm, base attenuate, apex acute to rounded. Pistillate scales orange or redbrown to coppery, with white or green midstripe, lanceolate to ovate, 4.8–5.5 mm, 2/3–3/4 length of and narrower than perigynia, margin white-hyaline, 0–0.2 (–0.4) mm wide, apex obtuse. Staminate scales with white-hyaline margin 0–0.2 (–0.4) mm wide. Perigynia appressed to appressed-ascending, greenish to straw colored, conspicuously 8–16-veined abaxially, conspicuously, shortly 4–7-veined adaxially, at least 3 adaxial veins longer than achene, lanceolate to ovate, planoconvex, 6.8–7.5 × 2–2.4 mm, (0.5–) 0.6–0.8 mm thick, margin flat, including wing 0.4–0.5 mm wide, ciliate-serrulate at least distally; beak redbrown, sometimes white-hyaline at tip, cylindric, unwinged, entire for 0.5–0.9 mm, abaxial suture usually inconspicuous, distance from beak tip to achene 3.5–4.2 mm. Achenes ovate or obovate, 2.1–2.5 × 1.2–1.5 mm, 0.5–0.6 mm thick.


Phenology: Fruiting summer (Aug).
Habitat: Moist areas on rocky hillsides
Elevation: 2000 m

Discussion

Of conservation concern.

Carex constanceana, known from only one locality, has not been collected since the early 1900s. It has features of C. petasata and of C. davyi. In one flora C. constanceana was included in C. petasata (A. Cronquist 1969).

Selected References

None.

Lower Taxa

None.

"narrower" 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 constanceana"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
obovate;ovate +
smaller +
0.5mm +  and 0.6mm +
planoconvex;lanceolate;ovate +
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 +
Stacey +
shortened +
persistent +
attenuate +
not enlarged +
cylindric +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3 (?) +  and 5 (?) +
v--shaped +
2mm;3mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
25 cm250 mm <br />0.25 m <br /> (35 cm350 mm <br />0.35 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2000 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist areas on rocky hillsides +
greenish +  and orangebrown +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white-hyaline +
0.4mm +  and 0.5mm +
green +  and white +
with (1-)3-6(-30) bristles and/or scales +
4-7-veined +  and 8-16-veined +
greenish +  and straw colored +
appressed +  and appressed-ascending +
Fruiting summer (Aug). +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Leafl. W. Bot. +
adventitious +
staminate +  and pistillate +
redbrown +  and coppery +
basal +  and proximal +
lanceolate;ovate +
0.48 cm4.8 mm <br />0.0048 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
herbaceous +  and membranous +
not differentiated +
cylindric +
distinct +
1.4 cm14 mm <br />0.014 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
obovoid +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
prolonged +
rounded +  and u--shaped +
Carex constanceana +
Carex sect. Ovales +
species +
plant +  and cespitose +