Tweedy'S Rush

(Juncus tweedyi)



Herbs, perennial, cespitose, 1.4--5.5 dm. Culms erect, terete, 1--3 mm diam., smooth. Cataphylls 0--1, straw-colored to pink, apex acute. Leaves: basal 1--3, cauline 1--2; auricles 0.5--3 mm, apex rounded to truncate, scarious; blade terete, 1.5--25 cm 0.5--2.5 mm. Inflorescences terminal panicles or racemes of 2--35 heads, 1--12 cm, branches erect; primary bract erect; heads 2--8-flowered, ellipsoid to narrowly obconic, 2--9 mm diam. Flowers: tepals green to light brown, lanceolate; outer tepals 2.3--3.1 mm, apex acuminate to rarely obtuse; inner tepals 2.5--3.2 mm, apex acuminate; stamens 3 (or 6), anthers 1/4--1/2 filament length. Capsules exserted, chestnut brown, imperfectly 3-locular, narrowly ellipsoid to prismatic, 3.2--4.8 mm, apex acute proximal to beak, valves separating at dehiscence. Seeds fusiform, 0.7--1.2 mm, tailed; body covered with whitish translucent veil.

Taxonomic tree:

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
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