horizontal, occasionally slightly ascending, drooping at tips, 4–17.3 × 1–3.6 cm, 2.5–10 times longer than wide; blade narrowly elliptic, occasionally elliptic
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horizontal to occasionally slightly ascending, drooping at tips, 4.1–12.7 × 1.5–3.6 cm, 1.9–5 times longer than wide; blade elliptic, occasionally narrowly
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base; blades occasionally pseudopetiolate, seldom disarticulating at maturity. Inflorescences terminal, sometimes also axillary, occasionally subterranean
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rarely with tuberous thickenings (Pseudostellaria). Stems prostrate to ascending or erect, simple or branched. Leaves opposite, connate proximally or not
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Acetosella), occasionally polygamomonoecious, with taproots and usually short caudex, or sometimes rhizomatous and/or stoloniferous. Stems erect, ascending, or
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stramineous, whitish, or rarely blackish, usually glossy. Stems creeping, ascending, erect, arching, or pendent, green or reddish, densely to loosely terete-foliate
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Volume 2. Treatment on page 246. Plants perennial, terrestrial or on rock, occasionally hemiepiphytic or epiphytic. Stems creeping to erect, rarely arborescent
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in fruit. Fruiting pedicels erect, horizontal, divaricate, spreading, ascending, or sigmoid, usually slender, sometimes stout. Flowers: sepals erect or
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Roots fibrous, principally adventitious. Stems (culms) usually trigonous, occasionally terete, rarely compressed, usually solid, rarely hollow or septate. Leaves
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glomerules). Involucre ± actinomorphic, not spurred; glands (2–) 4, slightly concave, flat, or slightly convex; appendages petaloid or absent. Staminate flowers (0–)
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immediately subtending calyx occasionally present. Pedicels present, or flowers sessile. Flowers bisexual or occasionally unisexual, radially symmetric;
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racemes, occasionally spikes; primary branches without axillary pulvini and usually appressed to ascending, or with axillary pulvini and ascending to strongly
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weak, unable to support anthers; anthers with 2 pollen-sacs, extrorse, occasionally latrorse, usually dehiscing longitudinally [rarely apically]; ovary inferior
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not spurred; glands [0–] (2–) 5, slightly concave, flat, or slightly convex; appendages usually petaloid, occasionally rudimentary. Staminate flowers (5–)
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Acnida), glabrous or pubescent. Stems erect, ascending, decumbent, or prostrate, usually branched, occasionally simple or nearly so; without nodal spines
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glands that senesce into white flakes. Leaves simple, usually alternate, occasionally opposite, lacking stipules, petiolate or sessile, sometimes reduced to
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small (less than 0.3 mm diam.), occasionally ephemeral, sometimes absent; sporangial capsules glabrous or occasionally hairy. x = 27, 29, 31, 32, 33, 34
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paniculate proximally and racemose distally, bracteate, occasionally pubescent; bracts ascending, erect, or rarely reflexed; peduncle sometimes scapelike
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margins entire, undulate or not, usually glabrous and smooth or occasionally slightly papillose, sometimes roughened abaxially by ± deltoid epidermal spicules
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green, growing in rigid cushions, tufts, mats or patches. Stems erect, ascending, or prostrate, dichotomously to irregularly branched. Leaves erect and
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