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Darwiniana, nueva serie

versión On-line ISSN 1850-1699


WHEELER, Gerald A.. Carex and Uncinia (Cyperaceae, Cariceae) from the Juan Fernández archipelago, Chile. Darwiniana [online]. 2007, vol.45, n.1, pp. 120-141. ISSN 1850-1699.

Ten members of the tribe Cariceae (Cyperaceae) occur on the Juan Fernández Archipelago: four species of Carex and six of Uncinia. Eight of the ten species occur on Alejandro Selkirk Island (= Masafuera; 50 km2) while four are known from Robinson Crusoe Island (= Masatierra; 48 km2). Carex fernandezensis, C. stuessyi, Uncinia aspericaulis, and U. macloviformis are newly described from the archipelago and all are endemic to the islands. Only two species, Carex berteroniana and Uncinia douglasii, both endemics, are of frequent occurrence and each occurs on both islands. Another endemic, Uncinia costata, is known only from the type locality on Alejandro Selkirk. The three remaining species, Uncinia phleoides, U. tenuis, and Carex phalaroides, the last here reported for the first time from the archipelago, also occur on the South American mainland. Lectotypes are chosen for the names Uncinia costata and U. tenuis f. firmula. Additionally, a new section of Carex, sect. Pellucidae, is circumscribed in this paper for the sectional placement of C. stuessyi and cognate species.

Palabras clave : Alejandro Selkirk Island; Carex; Juan Fernández Archipelago; Robinson Crusoe Island; Section Pellucidae; Taxonomy; Uncinia.

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