Juncus subg. Juncus
Juncus acutus subsp. leopoldii
leopold's rush, sharp rush, wire grass
3–4 mm diam.
terete.
1–2.
basal;
blade terete, not septate.
basal, 2–4;
sheaths brownish, inflated;
auricles absent or prolonged 1–3 mm, cartilaginous;
blade terete, 30–100 dcm × 2–3 mm.
terminal (sometimes appearing lateral) panicles of few to many heads, sympodial;
bracteoles absent proximal to perianth.
sympodial or appearing lateral, glomerules numerous, each with 2–5 flowers, branches unequal, 5–20 cm;
primary bract inflated, usually shorter than inflorescence.
in few-flowered heads.
tepals straw-colored, brown-tipped, 2–4 mm;
outer tepals widely lanceolate, margins scarious, apex obtuse to acutish;
inner tepals rounded, shorter;
stamens 6, filaments 0.2–0.4 mm, anthers 1.2–1.8 mm;
style 1–1.2 mm.
3-locular or pseudo-3-locular.
yellow-brown, pseudo-3-locular, nearly globose, 3.5–5 × 2.4–3.3 mm, obviously exceeding perianth, mucronate.
usually tailed (not tailed in J. roemerianus).
brownish, obliquely obovoid, body 0.6–0.7 mm, tails 0.2–0.3 mm.
Juncus subg. Juncus
Juncus acutus subsp. leopoldii
Species 9 (4 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Capsules 3.5–5 mm; plants of sw United States. | → 2 |
1. Capsules less than 3.5 mm, shorter than or nearly equal to perianth; plants of ne United States Atlantic Coast. | → 3 |
2. Capsules nearly globose, obviously longer than perianth | J. acutus subsp. leopoldii |
2. Capsules ellipsoid, nearly equal to or shorter than perianth | J. cooperi |
3. Capsules nearly equal to perianth; seeds tailed | J. maritimus |
3. Capsules distinctly shorter than perianth; seed not tailed | J. roemerianus |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
