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FNA | Family List | FNA Vol. 22 | Juncaceae | Juncus

63. Juncus triglumis Linnaeus, Sp. Pl. 1: 328. 1753.

Herbs, perennial, cespitose, 0.3--3.5 dm. Culms 1--8, 0.3--0.5 mm diam. Cataphylls 1--2. Leaves basal, 2--4; auricles slightly prolonged, rounded, scarious to ± leathery; blade deeply channeled, 2--10 cm, mostly shorter than culms. Inflorescences solitary heads, each with 2--3(--50) flowers; primary bracts brownish, nearly equal to or slightly shorter thanabout equaling inflorescence. Flowers: tepals pale brown or darker, oblong-lanceolate, 3--5 mm, outer and inner series nearly equal; stamens 6, filaments 2.5--4 mm, anthers 0.6--1 mm; styles 0.5--0.8 mm. Capsules tan, pseudo-3-locular, 3-gonous--cylindric, apex obtuse, mucronate. Seeds tan or darker, fusiform, body 0.5--1 mm, tails 0.6--1 mm.

Varieties 3 (2 in the flora): North America; Eurasia.

1 Most proximal bracts of inflorescence obtuse to mucronate, usually much shorter than inflorescence; capsules well exserted from perianth, 4.5--7 mm, apex conic or rounded proximal to persistent style   63a var. triglumis
+ Most proximal bracts of infloresecence equal to or longer than inflorescence, apex long acuminate or awned; capsules included or barely exserted from perianth, 3--5 mm, apex nearly truncate proximal to persistent style   63b var. albescens

Lower Taxa


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