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Vicia L. in Tierra del Fuego

D. M. MOORE and BRONWEN SCOTTER
Darwiniana
T. 20, No. 3/4 (Octubre 1976), pp. 371-386
Stable URL: http://www.jstor.org/stable/23215730
Page Count: 16
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Vicia L. in Tierra del Fuego
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Abstract

A detailed biometrical study of Vicia in Tierra del Fuego demonstrates that two species can be recognized, differing in pollen size and structure, leaflet size, peduncle length and leaf-tendril form and size. The Andean Patagonian diploid V. bijuga Gillies ex Hook. & Arn. is restricted to northern and eastern Tierra del Fuego, while the tetraploid V. magellanica Hook. f. extends further south and west, reaching the south side of the Beagle Channel. In cultivation both species are shown to be self-compatible and capable of self- pollination. Rarely, naturally occurring triploids (2n = 21) have been found. El estudio biométrico detallado de Vicia en Tierra del Fuego revela que se pueden reconocer dos especies, que se diferencian en el tamaño y estructura del polen, el tamaño de los foliolos, la longitud de los pedúnculos y la forma y tamaño de los zarcillos. El diploide patagónico-andino V. bijuga Gillies ex Hook. & Arn. está limitado en su distribución al Norte y Este de la Tierra del Fuego, mientras que el tetraploide V. magellanica Hook. f. se extiende más al Sur y al Oeste, alcanzando la parte Sur del Canal Beagle. Bajo cultivo, ambas especies muestran ser autocompatibles y capaces de autopolinización. Raramente se pueden encontrar híbridos naturales triploides (2 n = 21).

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