Juncus megacephalus

M. A. Curtis

Boston J. Nat. Hist. 1: 132. 1835.

Synonyms: Juncus scirpoides var. carolinianus Coville Juncus scirpoides var. echinatus Engelmann
Treatment appears in FNA Volume 22.

Herbs, perennial, rhizomatous, 3–11 dm. Rhizomes 3–4 diam. Culms erect, terete, 3–4 mm diam., smooth. Cataphylls 1–2, purple, apex acute. Leaves: basal 0–1, cauline 2–3; auricles 0.5–2 mm, apex acute, membranaceous; blade terete, 0–24 cm × 0.5–1.7 mm, most distal cauline leaf blade 0–2 cm, shorter than sheath. Inflorescences panicles of (1–)3–21 heads, 1–8 cm, branches erect to spreading; primary bract erect; heads 40–60-flowered, spheric, 8–12 mm diam. Flowers: tepals straw-colored to reddish brown, lanceolate-subulate; outer tepals 2.9–4.1 mm, apex acuminate; inner tepals 2.2–3.7 mm, apex acuminate; stamens 3, anthers 1/4–1/2 filament length. Capsules exserted, , straw-colorerd, 1-locular, subulate, 2.5–4.2 mm, apex tapering to subulate beak, valves not separat ing at dehiscence, fertile throughout or only proximal to middle. Seeds ellipsoid to ovoid, 0.4 mm, not tailed; body clear yellow-brown.

Phenology: Fruiting summer.
Habitat: Fresh marshes, moist hollows of sand dunes, swales, roadside ditches, and dry fertile soil
Elevation: 0–100 m


V22 120-distribution-map.jpg

Ala., Fla., Ga., La., Md., Miss., N.C., S.C., Tex., Va.


Selected References


Lower Taxa

... more about "Juncus megacephalus"
Ralph E. Brooks* +  and Steven E. Clemants* +
M. A. Curtis +
Ala. +, Fla. +, Ga. +, La. +, Md. +, Miss. +, N.C. +, S.C. +, Tex. +  and Va. +
0–100 m +
Fresh marshes, moist hollows of sand dunes, swales, roadside ditches, and dry fertile soil +
Fruiting summer. +
Boston J. Nat. Hist. +
Juncus scirpoides var. carolinianus +  and Juncus scirpoides var. echinatus +
Juncus megacephalus +
Juncus subg. Septati +
species +