Kyllinga brevifolia |
Kyllinga squamulata |
|
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perennial greenhead sedge, short leaf spikesedge |
Asian spikesedge, crested greenhead sedge |
|
Habit | Plants perennial, cespitose or not, long-creeping rhizomatous. | Plants annual, cespitose, not rhizomatous. |
Culms | sometimes spaced to 3 cm apart, (5–)12–25(–55) cm, smooth. |
5–35 cm, smooth. |
Leaves | flat, 2–21 cm × 1.5–3.5 mm. |
flat, 5–30 cm × 1.5–2 mm. |
Inflorescences | spikes 1–3, 4–7 × 4 mm; bracts 3–4, longest ± erect, others ascending to horizontal, flat, 1.5–18 cm × 1–3.3 mm. |
spike 1, subglobose, 6–10 mm diam.; bracts 3–4, horizontal to slightly reflexed, flat, 1–6 cm × 1–2 mm. |
Spikelets | (20–)40–60(–100), pale greenish or reddish brown, ovate, (2.2–)2.5–2.8(–3.2) × (0.6–)0.7–0.8(–1.2) mm; floral scales laterally 2–3-veined, elliptic to ovate, 1.8–3 × (0.8–)1.1–1.6 mm, midvein not winged, apex mucronate; stamens (1–)2; anthers 0.8–1.1 mm; style 0.6–1.2 mm; stigmas 0.5–1.5 mm. |
50–70(–100), stipitate, ovate, 2.5–4 × 2–3 mm; floral scales dull greenish white to stramineous, midvein with laciniate keel ± as long as scale, 1 mm wide, laterally 2-veined, ovate, 2.2–3.8 × 2 mm, acuminate; stamens (1–)2; anthers 2 mm; style 1 mm; stigmas 1.5–2 mm. |
Achenes | brown, substipitate or stipitate, ellipsoid to oblong-ellipsoid, 1–1.2(–1.3) × 0.6–0.8 mm, stipe, if present, 0.1–0.2 mm, apex obtuse to subtruncate, apiculate, papillate. |
chestnut brown to purplish brown, ovoid, 1.5–2 × 1.2 mm, base sessile, apex apiculate, puncticulate. |
Kyllinga brevifolia |
Kyllinga squamulata |
|
Phenology | Fruiting summer. | Fruiting summer. |
Habitat | Damp grasslands, shorelines, ditches, croplands | Lawns, farmlands |
Elevation | 0–200 m [0–700 ft] | 0–50 m [0–160 ft] |
Distribution |
AL; CA; FL; GA; LA; MS; NC; OK; SC; TX; Mexico; Central America; South America; West Indies; Asia; Africa; Australia
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FL; West Indies; native tropical Asia [Introduced in North America] |
Discussion | Reports of Kyllinga brevifolia from Connecticut, Delaware, Maryland, New Jersey, Pennsylvania, and Virginia should be referred to as K. gracillima. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 23, p. 193. | FNA vol. 23, p. 194. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Cyperus brevifolius | Cyperus metzii |
Name authority | Rottbøll: Descr. Icon. Rar. Pl., 13, plate 4, fig. 3. (1773) | Thonning ex Vahl: Enum. Pl. 2: 381. (1805) |
Web links |