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FNA | Family List | FNA Vol. 23 | Cyperaceae | Carex

415. Carex viridula Michaux, Fl. Bor.-Amer. 2: 170. 1803.

Greenish sedge, carex verdâtre

Plants cespitose. Culms straight or arcuate, 2–85 cm. Leaves of flowering stems shorter than to exceeding culms, to 20 cm × 0.8–5.4 mm; ligules on distal cauline leaves usually obsolete (except in 414.b Carex viridula subsp. brachyrrhyncha). Inflorescences: peduncles of terminal staminate spikes 0–28 mm; bracts to 18 cm × 0.6–3.4 mm; inner band of sheaths concave or truncate. Spikes: proximal pistillate spikes 1–8, contiguous or proximal distant, sessile or short-pedunculate, globose to short-cylindric, 4–17.5 × 3–11 mm; terminal staminate spike sessile or pedunculate, 5–25 × 1–3.6 mm. Scales: pistillate scales pale brown to reddish brown, 1.4–3.2 × 0.8–1.7 mm, margins pale, narrow, hyaline; staminate scales reddish brown, lanceolate to ovate, 2.3–5.2 × 0.7–2 mm, margins narrowly pale hyaline, apex obtuse to acuminate. Anthers 0.9–3.1 mm. Perigynia spreading, yellow to dark olive, 1.8–4.2 × 0.8–2 mm, apex gradually or abruptly narrowed; beak straight or reflexed less than 20°, 0.3–2.1 mm, scabrous or smooth. Achenes 1–1.8 × 0.7–1.4 mm.

Subspecies 3 (3 in the flora): North America, Europe, Asia, Africa (Morocco).

1 Proximal perigynia in each spike reflexed; beak of perigynium forming angle greater than 20° with body; staminate spike on peduncle usually more than 4.5 mm; ligules of distal cauline leaves truncate or rounded, usually well-developed.   415b subsp. brachyrrhyncha
+ Perigynia spreading, straight (curvature at junction of body and beak less than 25°); staminate spike subsessile to long-pedunculate; ligules of distal cauline leaves usually obsolete.   (2)
2 (1) Perigynia less than 3 mm.   (3)
+ Perigynia 3 mm or greater.   (4)
3 (2) Leaves thickened, somewhat succulent, recurved; culms less than 5 cm; staminate spike less than 6.5 mm; coastal areas of Newfoundland and Briar Island, Nova Scotia.   415b subsp. brachyrrhyncha
+ Leaves neither thickened nor recurved; culms greater than 5 cm; staminate spike 7+ mm; widespread.   415a subsp. viridula
4 (2) Proximal pistillate spike remote, often nearly basal; perigynia and foliage often olive or dark green; culms often arcuate or sinuous; staminate spikes on peduncles 3–28 mm.   415c subsp. oedocarpa
+ Pistillate spikes contiguous or aggregated; foliage grayish or light green; perigynia grayish green to yellowish green; culms erect; staminate spikes on peduncles to 20 mm.   415a subsp. viridula

Lower Taxa


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