Mentioned on page 350. Herbs, submersed or emersed on wet substrates, 0.2–3 (–10) cm. Stems erect or ascending, usually unbranched, sometimes 1–2 branched
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Annuals or biennials; not scapose; usually pubescent or hirsute, rarely glabrous. Stems erect or ascending, unbranched or branched basally or distally
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obovoid, rarely cylindric or broadly obovoid, 7–14 × 6–10 mm, shiny, not glaucous, glabrous or sparsely villous; sepals erect or ascending, rarely nearly flat
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overtopped by culm; basal leaves spreading, twisted, distal longer, erect or ascending; blades proximally flat, 1–3 mm wide, apex trigonous, subulate, tapering
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inflorescence height or length or size","axillary inflorescence position or structure subtype","inflorescence length or size","inflorescence position or structure
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127. Mentioned on page 65, 67. Annuals, 10–80+ cm. Stems erect or ascending, branched from bases or ± throughout. Leaves cauline; opposite; petiolate; blades
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Perennials, 3–40 cm; taprooted (taproots deep, woody) or rhizomatous. Stems 1–20+, erect or ascending, simple or branched proximally, ± scapiform, glabrous. Leaves
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Treatment appears in FNA Volume 3. Stems erect or ascending from caudices, not rooting nodally, distally glabrous or brown-pilose, not bulbous-based. Tuberous
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T-shaped minute hairs. Stems erect or ascending, sparsely to moderately leafy, 15–40 cm. Leaves dull green when fresh or dry, petiolate, those of a pair
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Fl. N. U.S. 1: 377. 1896 Treatment appears in FNA Volume 22. Herbs, erect or ascending, rarely rooting at nodes. Stems 5–90 cm; internodes glaucous, glabrous
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wide, finely spreading-pubescent or glabrous, not papillose abaxially. Inflorescences 15–50 cm; spikes erect or ascending; proximal (1–) 2–3 spikes pistillate;
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Mentioned on page 216. Perennials, 40–150 cm; taprooted. Stems 1–6, erect or ascending, much branched, basally setose, distally glabrous. Leaves basal and
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scapiform); taprooted. Stems 1–25+, erect or ascending, simple, glabrous or densely tomentose, sometimes glabrescent. Leaves basal or subbasal; petiolate (petioles
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of North America Association Stems erect or ascending, 10–100 cm, glandular and eglandular-hairy. Leaves opposite or whorled proximally, opposite distally;
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glabrous or pubescent, trichomes simple or forked, (less than 0.1 mm). Stems erect or ascending, branched basally. Leaves basal and cauline; petiolate or sessile;
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arrested, budlike, tips straight; rhizomatous stems mostly ascending; aerial stems erect or ascending. Rhizophores borne on upperside of stems, restricted to
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attenuate. Inflorescences: scape conspicuous, erect or ascending, 10–35 cm, 4–8 mm diam.; bracts densely imbricate, erect to spreading, like leaves but gradually
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caudices or runner roots. Stems 1–several, erect or ascending, glabrous to thinly arachnoid-tomentose with fine non-septate trichomes and/or villous with
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246. Annuals or perennials; (caudex simple or branched), [rhizomatous]; not scapose. Stems erect or ascending [decumbent], unbranched or branched distally
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glabrous or sparsely pubescent. Stems (simple or few to several from base), erect or ascending, unbranched. Leaves basal and cauline; petiolate or sessile;
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