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.

... more about "Carex flava"
William J. Crins +
Linnaeus +
Yellow sedge +  and carex jaune +
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 +
Moist to wet habitats, such as open meadows, fens, partially shaded shrub carrs, swamps, on lime-rich soils +
Fruiting Jun–Aug. +
Illustrated +
Carex flava var. fertilis +, Carex flava var. gaspensis +, Carex flava var. laxior +  and Carex laxior +
Carex flava +
Carex sect. Ceratocystis +
species +