The Taxonomy of Carex sect. Abditispicae sect. nov. (Cyperaceae) from Austral South America
1987; American Society of Plant Taxonomists; Volume: 12; Issue: 4 Linguagem: Inglês
10.2307/2418892
ISSN1548-2324
Autores Tópico(s)Rangeland and Wildlife Management
ResumoCarex sect. Abditispicae Wheeler, described from southern South America, belongs in subg. Carex. It is comprised of four species: C. macrosolen Steudel which was formerly placed in sect. Physocarpae (Drejer) L. Bailey subsect. Lupulinae (Tuckerman) Kiik.; C. acaulis Urv. formerly placed in sect. Spirostachyae (Drejer) L. Bailey; C. subantarctica Speg., previously unplaced, and a new species, C. pisanoi. Section Abditispicae is distinguished from all others by: culms solitary or few together from long-creeping rhizomes; basal sheaths brown; bract and leaf margins with irregularly- spaced, unbranched and 2(4)-branched, short, stiff hairs; spikes 1-5, the lateral ones (when present) borne at or near the plant base and largely hidden among leaves or slightly exserted on more or less erect peduncles; perigynia subcoriaceous or coriaceous, more or less papillose, 9-15-veined, plano-convex to biconvex or suborbicular in cross section; perigynium beak essentially lacking teeth, or, if toothed, the teeth weak and scarious; staminal filaments sometimes connate (stamens monadelphous), then the anthers in groups of 2's or 3's; stigmas 2. The section appears to be endemic to southern South America, occurring in Patagonia and Tierra del Fuego, with isolated populations also known from west-central Argentina and the Falkland Islands. Habitats are moist to wet grass- lands, swales, spring seepages, bogs and swamps, mossy vega, lake shores, and wet sands and gravels by the sea.
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