Juncus subg. Alpini in Flora of North America @ efloras.org

1f. Juncus subg. Alpini BUCHENAU(Engelmann) Buchenau, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie. 17: 1618. 1886.

Juncus [unranked] aAlpini Engelmann [unranked]; Juncus sect. Alpini (Engelmann) Vierhapper

Herbs, perennial, rhizomatous, usually fresh-water habitats. Stems terete. Leaves basal or cauline; blade terete, channeled, imperfectly septate or not. Inflorescences terminal panicles or racemes of several heads or a single terminal head, sympodial or monopodial; bracteoles absent at base of perianth. Flowers in multiflowered heads. Capsules (1--)3-locular. Seeds long tailed, large.

Species 724 (4 in the flora); n North America, n Europe, n Asia..

1 Plants strongly rhizomatous 61 Juncus castaneus

+ Plants cespitose, rhizomes (if present) short, sparingly branched. (2)

2 (1) Leaves basal and cauline 60a Juncus stygius var. americanus

+ Leaves all basal. (3)

3 (2) Primary bract of infloresence much longer than inflorescence 62 Juncus biglumis

+ Primary bract of inflorescence nearly equal to or shorter than inflorescence 63 Juncus triglumis