Carex praeceptorum

Mackenzie in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 18: 95. 1931.

IllustratedEndemic
Synonyms: Carex canescens var. dubia L. H. Bailey Carex heleonastes var. dubia (L. H. Bailey) B. Boivin
Treatment appears in FNA Volume 23. Mentioned on page 313, 317.

Plants loosely or densely cespitose, in small clumps; rhizomes short. Culms usually erect, slender, 10–20 (–30) cm. Leaves: sheaths pale-brown abaxially, inner band thin, hyaline, sometimes red tinged, concave at summit; ligules as long as wide; blades pale to gray-green, flat, 5–15 cm × 1.5–2.5 mm, shorter than culms, thin. Inflorescences 1–1.5 (–2) cm × 5–10 mm; proximal bracts bristlelike, prolonged, distal bracts scalelike. Spikes 3–5, gynecandrous, approximate, sessile, containing 8–15 (–20) perigynia; terminal spike staminate for less than 1/2 of length, shortly clavate, oblong-ovoid, 4–7 × 3–5 mm. Pistillate scales light chestnut-brown with lighter center and hyaline margins, ovate, subequal to perigynia, apex obtuse. Perigynia appressed-ascending, pale-brown, often darker brown in age, finely several-veined, elliptic-ovate, 1.5–2 × 1 mm, widest near middle, membranous; beak short, entire or slightly serrulate. Achenes pale-brown, broadly obovate, 1.25 × 0.8–1 mm, dull to slightly glossy.


Phenology: Fruiting Jul–Sep.
Habitat: Boggy places, wet soil around montane ponds and lakes
Elevation: 2300–3500 m

Distribution

V23 563-distribution-map.jpg

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

Discussion

Selected References

None.

Lower Taxa

None.

"widest" is not a number."prolonged" is not a number.

... more about "Carex praeceptorum"
1.25 cm12.5 mm <br />0.0125 m <br /> (?) +
dull +  and slightly glossy +
smaller +
0.8mm;1mm +
beaked +  and beakless +
papillose +  and smooth +
Heikki Toivonen +
Mackenzie in N. L. Britton et al. +
shortened +
truncate +  and rounded +
serrulate +  and entire +
inconspicuous +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
pale +  and gray-green +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
v--shaped +
thin;1.5mm;2.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
slender +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
2300–3500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Boggy places, wet soil around montane ponds and lakes +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
red tinged +  and hyaline +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
angled;rounded +
with (1-)3-6(-30) bristles and/or scales +
darker brown +  and pale-brown +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
appressed-ascending +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Fruiting Jul–Sep. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
in N. L. Britton et al., N. Amer. Fl. +
adventitious +
light chestnut-brown +
basal +  and proximal +
subequal +
cylindric +
Illustrated +  and Endemic +
approximate +
gynecandrous +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex canescens var. dubia +  and Carex heleonastes var. dubia +
Carex praeceptorum +
Carex sect. Glareosae +
species +
oblong-ovoid +  and clavate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
plant +  and cespitose +