Carex flava

Linnaeus

Sp. Pl. 2: 975. 1753.

Common names: Yellow sedge carex jaune
Illustrated
Synonyms: Carex flava var. fertilis Peck Carex flava var. gaspensis Fernald Carex flava var. laxior (Kükenthal) Gleason Carex laxior
Treatment appears in FNA Volume 23. Treatment on page 525. Mentioned on page 521, 523, 524.

Plants cespitose. Culms straight, 10–75 cm. Leaves of flowering-stems shorter than to slightly exceeding culms, 5–30 cm × 1.6–4.7 (–5.8) mm; ligules on distal cauline leaves truncate or rounded. Inflorescences: peduncles of terminal spikes 0.4–5 (–9) mm; bracts to 18.5 cm × (0.7–) 2–4.5 mm; inner band of sheaths truncate or concave. Spikes: proximal pistillate spikes (1–) 2–5, contiguous or approximate, globose to elliptic, 8–22 × 7.5–12.7 mm; terminal staminate spikes sessile or pedunculate, 9–22 × 1.1–3 mm. Scales: pistillate scales reddish-brown, 2.3–3.9 × 0.9–1.4 mm; staminate scales reddish-brown, ovate, margins narrowly whitish hyaline, apex obtuse. Anthers 1–2.1 mm. Perigynia reflexed, bright-yellow at maturity, 4–6.3 × 1–1.9 mm, apex gradually narrowed; beak 1.3–2.7 mm, forming angle of (15–) 26–72° with body, scabrous. Achenes 1.3–1.7 × 0.9–1.2 mm. 2n = 60.


Phenology: Fruiting Jun–Aug.
Habitat: Moist to wet habitats, such as open meadows, fens, partially shaded shrub carrs, swamps, on lime-rich soils
Elevation: 0–2000 m

Distribution

V23 980-distribution-map.jpg

St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.S., Nunavut, Ont., P.E.I., Que., Alaska, Conn., Idaho, Ind., Maine, Mass., Mich., Minn., Mont., N.H., N.J., N.Y., Ohio, Pa., R.I., Vt., Wis., Europe, Asia (Iran)

Discussion

Selected References

None.

Lower Taxa

None.

"/10" is not declared as a valid unit of measurement for this property.

... more about "Carex flava"
0.13 cm1.3 mm <br />0.0013 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
trigonous +
smaller +
0.9mm;1.2mm +
0.1 cm1 mm <br />0.001 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
, +  and contracted +
William J. Crins +
Linnaeus +
shortened +
tapering +  and rounded +
bidentate +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
v--shaped +  and septate-nodulose +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (18.5 cm185 mm <br />0.185 m <br />) +
ascending +  and appressed +
scale-like +  and leaflike +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
Yellow sedge +  and carex jaune +
straight +
round +  and trigonous +
10 cm100 mm <br />0.1 m <br /> (75 cm750 mm <br />0.75 m <br />) +
rounded +  and truncate +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Alaska +, Conn. +, Idaho +, Ind. +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, N.H. +, N.J. +, N.Y. +, Ohio +, Pa. +, R.I. +, Vt. +, Wis. +, Europe +  and Asia (Iran) +
0–2000 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist to wet habitats, such as open meadows, fens, partially shaded shrub carrs, swamps, on lime-rich soils +
concave +  and truncate +
prophyllate +  and pedunculate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
0.47 cm4.7 mm <br />0.0047 m <br /> (0.58 cm5.8 mm <br />0.0058 m <br />) +
5cm +  and 30cm +
basal +  and cauline +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
whitish hyaline +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
0.4 cm4 mm <br />0.004 m <br /> (0.63 cm6.3 mm <br />0.0063 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Fruiting Jun–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
rounded-trigonous +, ovoid +, , +  and obovoid +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
long-sheathing +  and leaflike +
cuspidate +  and acute +
adventitious +
staminate +  and pistillate +
reddish-brown +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
basal +  and proximal +
0.9mm;1.4mm +
cylindric +
Illustrated +
approximate +  and contiguous +
0.8 cm8 mm <br />0.008 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
globose;elliptic +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.27 cm12.7 mm <br />0.0127 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex flava var. fertilis +, Carex flava var. gaspensis +, Carex flava var. laxior +  and Carex laxior +
Carex flava +
Carex sect. Ceratocystis +
species +
pedunculate +, sessile +  and staminate +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
plant +  and cespitose +