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annual greenhead sedge, low spikesedge

Habit Herbs, annual, cespitose, not rhizomatous.
Culms

(5–)15–30(–55) cm, smooth.

Leaves

flat to V-shaped, 4–20(–30) cm × 1.5–3(–3.6) mm.

Inflorescences

spikes 1–3, pale greenish, (3–)5–8(–11) × 5–7 mm;

bracts (3–) 4(–5), horizontal to ascending at 30°, flat, (1–)3–10(–22) cm × 1–2.5(–3) mm.

Spikelets

50–150, lanceolate to ovate-lanceolate, (1.9–)2.4–2.8(–3.8) × 0.6–0.9 mm;

floral scales pale brownish to transparent, midvein not winged, laterally 2–3(–4)-veined, ovate, (1.8–)2.2–3.1(–3.4) × 1–1.7 mm;

stamens 2;

anthers elliptic, (0.2–)0.3–0.4 mm;

style 0.5–0.8 mm;

stigmas 0.5–0.9 mm.

Achenes

light brown, stipitate, oblong, 1–1.2(–1.4) × 0.5–0.6(–0.7) mm, base cuneate to rounded, stipe to 0.1 mm, apex subtruncate, apiculate, finely papillose.

Kyllinga pumila

Phenology Fruiting summer.
Habitat Damp grasslands, shorelines, ditches, lawns, gardens
Elevation 0–200 m (0–700 ft)
Distribution
from FNA
AL; AR; DE; FL; GA; IL; IN; KS; KY; LA; MD; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TN; TX; VA; WV; Mexico; Central America; South America; West Indies; Africa
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 23, p. 194.
Parent taxa Cyperaceae > Kyllinga
Sibling taxa
K. brevifolia, K. gracillima, K. odorata, K. squamulata
Synonyms Cyperus densicaespitosus, Cyperus tenuifolius, K. tenuifolia
Name authority Michaux: Fl. Bor.-Amer. 1: 28. (1803)
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