Carex infirminervia

Naczi

Novon 12: 528, fig. 7. 2002.

Treatment appears in FNA Volume 23. Treatment on page 324. Mentioned on page 322, 323.

Plants densely cespitose. Culms 10–83 cm × 0.8–1.3 mm, papillose at mid height. Leaves: ligule of distal leaf (2.1–) 2.6–6.8 mm; blades 1.4–3.8 mm wide, widest blade 2.3–3.8 mm wide. Inflorescences 27–68 mm, proximalmost 2 spikes overalapping or separate; proximal internode 7.3–28 mm; proximal bract 11–61 mm; spikes (4–) 5–6 (–7), usually gynecandrous, sometimes pistillate or staminate; proximal spike usually with 1–3 staminate and 11–22 pistillate flowers, longest per plant with 12–22 pistillate flowers, 9.7–18 × 3.7–6.6 mm, longest per plant 12–18 mm; terminal spike usually with 1–3 staminate and 14–21 pistillate flowers, sessile or on peduncle to 1.8 mm, 9.6–16 × 3.4–6.2 mm. Pistillate scales whitish to castaneous, with green midrib, 2.9–4.4 mm, body 2.9–3.8 × 1.4–1.8 mm, apex acuminate to short-awned, awn to 1.1 mm. Staminate scales with whitish to castaneous margins, 3.1–4.3 × 1–1.5 mm, apex acute to short-awned. Anthers 1.3–1.8 mm. Perigynia erect to appressed-erect, green to brown, veinless or weakly 1–3 (–4) -veined abaxially, veinless adaxially, narrowly lanceolate in outline, 3.7–5.3 × 1.1–1.3 (–1.4) mm, 3.2–3.9 (–4.2) times as long as wide, apex gradually tapering; beak 1.5–2.2 mm, 39–49% of total perigynium, margins denticulate for distal 49–60% of length of perigynium, apex entire or bidentulate, teeth 0–0.2 (–0.4) mm, 0–8% of length of perigynium. Stigmas 1.8–2.5 mm. Achenes 1.6–2.2 × 1.1–1.3 mm, 1.5–1.8 times as long as wide.


Phenology: Fruiting (late spring–)summer.
Habitat: Mesic to dry-mesic deciduous and deciduous-coniferous forests, often on slopes above streams, occasionally in open habitats such as grassy slopes
Elevation: 600–2500 m

Distribution

V23 572-distribution-map.jpg

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

Discussion

The recently described Carex infirminervia is quite scattered and uncommon throughout its range. Occasionally, plants of C. infirminervia grow with or very close to plants of C. bolanderi, C. deweyana, and C. leptopoda. Past failure to recognize C. infirminervia led to confusion among these taxa and is likely responsible for the desiscion by many authors of recent floristic treatments to lump C. bolanderi, C. deweyana, and C. leptopoda.

Selected References

None.

Lower Taxa

None.

"bidentulate" is not a number."papillose" is not a number."longest" is not a number.

... more about "Carex infirminervia"
0.16 cm1.6 mm <br />0.0016 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
planoconvex;biconvex +
1.1mm;1.3mm +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Robert F. C. Naczi +
0 cm0 mm <br />0 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
shortened +
cuneate +  and rounded +
Deweyanae +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
v--shaped +  and flat +
1.4mm;3.8mm +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
green;hyaline +
10 cm100 mm <br />0.1 m <br /> (83 cm830 mm <br />0.83 m <br />) +
round +  and trigonous +
0.8mm;1.3mm +
Alta. +, B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
600–2500 m +
pistillate +  and staminate +
0.97 cm9.7 mm <br />0.0097 m <br /> (?) +  and 1.8 cm18 mm <br />0.018 m <br /> (?) +
hypogynous +  and subtending +
14 +  and 21 +
3.7mm;6.6mm +
biconvex +  and trigonous +
Mesic to dry-mesic deciduous and deciduous-coniferous forests, often on slopes above streams, occasionally in open habitats such as grassy slopes +
2.7 cm27 mm <br />0.027 m <br /> (6.8 cm68 mm <br />0.068 m <br />) +
sessile +, staminate +  and pistillate +
androgynous +  and gynecandrous +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.68 cm6.8 mm <br />0.0068 m <br />) +
serrulate +  and entire +
whitish +  and castaneous +
denticulate +
0 cm0 mm <br />0 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
veinless +  and 1-3(-4)-veined +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
green +  and brown +
3.2-3.9(-4.2) +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
erect +  and appressed-erect +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
Fruiting (late spring–)summer. +
2-3(-4)-carpellate +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
3 (?) +  and 1 (?) +
1.1 cm11 mm <br />0.011 m <br /> (6.1 cm61 mm <br />0.061 m <br />) +
0.73 cm7.3 mm <br />0.0073 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
adventitious +
staminate +  and pistillate +
whitish +  and castaneous +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
basal +  and proximal +
2-keeled +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
1mm;1.5mm +
cylindric +
staminate +  and pistillate +
gynecandrous +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
deciduous +
2-3(-4)-fid +
enlarged +
Carex infirminervia +
Carex sect. Deweyanae +
species +
on peduncle +  and sessile +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
plant +  and cespitose +
2.3mm +  and 3.8mm +