Carex sect. Shortianae

(L. H. Bailey) Mackenzie in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 18: 341. 1935.

Basionym: Shortianae L. H. Bailey Proc. Amer. Acad. Arts 22: 71. 1886
Treatment appears in FNA Volume 23.

Plants cespitose, short-rhizomatous. Culms brown at base. Leaves: basal sheaths fibrous; sheath fronts membranous, sometimes slightly transversely rugose, septate-nodulose; blades with 2 lateral-veins on adaxial side more prominent than midvein, M-shaped in cross-section when young, widest leaves not more than 10 mm, glabrous. Inflorescences racemose, with (3–) 4–6 spikes; proximal bracts leaflike, sheathless or very short-sheathing; lateral spikes pistillate or gynecandrous with few staminate flowers, pedunculate, prophyllate; terminal spike gynecandrous. Proximal pistillate scales with apex acute or mucronate. Perigynia rigidly spreading, veinless on faces but with 2 strong marginal veins, stipitate, transversely wrinkled, very broadly obovate, compressedtrigonous in cross-section, base cuneate, apex rounded, abruptly beaked, glabrous; beak bent, to 0.2 mm, orifice entire or emarginate. Stigmas 3. Achenes concavely trigonous, smaller than and loosely enclosed by bodies of perigynia; style deciduous.

Distribution

e North America

Discussion

Species 1.

Selected References

None.

Lower Taxa

... more about "Carex sect. Shortianae"
trigonous +
smaller +
Theodore S. Cochrane +
(L. H. Bailey) Mackenzie in N. L. Britton et al. +
shortened +
cuneate +
Shortianae +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
more prominent +
m--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
e North America +
hypogynous +  and subtending +
biconvex +  and trigonous +
prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
emarginate +  and entire +
with (1-)3-6(-30) bristles and/or scales +
stipitate +  and veinless +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
short-sheathing +  and sheathless +
in N. L. Britton et al., N. Amer. Fl. +
adventitious +
basal +  and proximal +
2-keeled +
septate-nodulose +
cylindric +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Shortianae +
section +
plant +  and cespitose +