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Herbs, annual, cespitose, 0.3--1 dm. Culms to 20. Leaves basal; auricles absent; blade 0.5--2.5 cm ã 0.5 mm. Inflorescences: glomerules 1--2, each with 2--10(--14) flowers; bracts subtending inflorescence 1(--2), foliose, clearly surpassing inflorescence. Flowers: tepals 6, tan to brownish, subulate, lanceolate-ovate, 3.5--4.5(--5) mm, 2 times length of inner tepals, margins scarious; inner series delicate, shorter, apex acute; stamens 3, filaments 1 mm, anthers 0.5 mm; style 0.4--0.7 mm. Capsules tan to reddish brown, 3-locular, globose to obovoid, 1.2--1.7 mm, shorter than tepals. Seeds ellipsoid-ovoid, 0.3--0.4 mm. 2n = 18.
Annual, dwarf, tufted, reddish-tinged, 2.5-9-(15) cm high; roots fibrous, plant readily pulled from soil. Leaves all basal, very short, setaceous. Inflorescence small, terminal, a single 3-8-flowered cluster with occasionally 1-2 lateral clusters, subtended by a longer bract. Tepals to 5 mm long, outer long-acuminate, much > inner. Stamens 4, or variable 3-5. Capsule 3-5 mm long, reddish, < tepals, shortly beaked, light green tinged with red at top.
Small, tufted, annual herb, up to 80 mm high. Leaves many; blade narrowly linear; cataphylls absent. Flowers: capitulum pseudolateral; stamens 3; single subtending bract exserted, forming continuation of stem; perianth green; Jun.
Small, tufted annual herb, up to 80 mm tall. Plants with capitulum pseudolateral. Stamens 3. Subtending bract exserted, forming continuation of stem. Leaves many, narrowly linear. Flowers green.
A small annual rush about 9 cm. high
