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

82. Juncus texanus (Engelmann) Coville in J. K. Small, Flora of the Southeastern United States. 259. 1903.

Texas rush

Juncus nodosus Linnaeus var. texanus Engelmann, Trans. Acad. Sci. St. Louis 2: 471. 1868

Herbs, perennial, rhizomatous, 2.5--6 dm. Rhizomes 1 mm diam., with swollen nodes. Culms erect, terete, 1--3 mm diam., smooth. Cataphylls 0 or 1--2, straw-colored, apex rounded. Leaves: basal 0--1, cauline 3--5, auricles 1.5--2.5 mm, apex rounded to acutae, scarious; blade straw-colored to green, terete, 5.5--20 cm x 1--2.5 mm. Inflorescences terminal panicles of 2--16 heads, 2.5--6 cm, branches ascending, spreading, or reflexed; primary bract erect to spreading; heads 10--40-flowered, spheric, 11--15 mm diam. Flowers: tepals green or straw-colored to reddish brown, lance-subulate, apex acuminate; outer tepals (3.5--)4--4.9 mm; inner tepals 3.9--5.4 mm; stamens 6, anthers 2--3 times filament length. Capsules exserted, chestnut brown, 1-locular, lance-subulate, 5.2--6.5(--8) mm, apex tapering, valves separating at dehiscence, fertile throughout or only proximal to middle. Seeds obovoid, 0.45--0.5 mm, not tailed; body clear yellow-brown.

Fruiting summer. Swamps, depressions, seeps, sand or gravel bars, and wet mud; 400--600 m; La., Okla., Tex.


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