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

79. Juncus validus Coville, Bulletin of the Torrey Botanical Club. 22:305. 1895.

Juncus crassifolius Buchenau, Bot. Jahrb. Syst. 12: 326. 1890, not Bosc ex Laharpe (1827)

Herbs, perennial, rhizomatous, sometimes to nearly cespitose, 4--10 dm. Rhizomes not tuberous, 2 mm diam. Culms erect, terete, 3--5 mm diam., smooth. Cataphylls 0. Leaves: basal 2--3(--6), cauline 1--4; auricles 1--3 mm, apex acute, membranaceous, absent on proximal leaves; blade green, laterally compressed, 9--70 cm x 2--6 mm. Inflorescences terminal panicles of 10--30 heads, 10--30 cm, branches spreading; primary bract erect; heads 20--30-flowered, spheric, (10--)12--15 mm diam. Flowers: tepals green to reddish, lance-subulate, 4--5 mm, apex acuminate; stamens 3, anthers 1/3--1/2 filament length. Capsules exserted, straw-colored, 1-locular, subulate, 4--5,5 mm, tapering to subulate tip, valves separating or not at dehiscence; fertile throughout or only proximal to middle.. Seeds broadly ellipsoid, 0.5--0.6 mm, not tailed; body clear yellow-brown.

Varieties 2 (2 in the flora): United States.


1 Inflorescence 10--30 cm; heads 20--30-flowered; capsule fully separating at apex after dehiscence   79a var. validus
+ Inflorescence 2--5 cm; heads 6--15-flowered; capsule remaining united at apex after dehiscence   79b var. fascinatus

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