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Leaves opposite or alternate frequently with smaller leaves or short branches arising in axils, 30–40(55) x 0.5–1(2.25) mm., very slender to almost filamentous, mostly revolute, sparsely short-hispid, strict or occasionally irregularly contorted when dry, 1-nerved.
Annual herb 35–45 cm. tall, erect; stems slender, much branched, glabrous to subglabrous above, sparsely minutely pubescent below, branches ascending, leafy throughout.
Spikes up to 15 cm. long, slender, cylindrical; flowers laxly arranged, opposite or alternate, ascending, somewhat appressed to axis.
Calyx (5.5)6.8–8.5 mm. long, 5-lobed, 5-nerved, glabrous; lobes (0.5)1–1.8(2) mm. long, triangular, acute or obtuse, short-ciliate.
Capsule 9–10 x c. 1 mm., slender, linear-elliptic in outline tapering to acute, rostrate apex.
Bracts (2)3–4(7) x c. 1 mm., lanceolate, glabrous except for short-ciliate margin and midrib.
Bracteoles 1.6–2.8(4.3) mm. long, linear, ciliate.
