Circumscription of the south American moonwort botrychium (ophioglossaceae)
The genus Botrychium (Ophioglossaceae) is comprised of about 30 widely distributed species. Because of their small size and few, yet variable, morphological characters, many questionable taxa have been described over the years. Since its description in 1906, B. dusenii has been treated as both a d...
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| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Taylor & Francis
2022
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| Materias: | |
| Acceso en línea: | http://repositorio.unne.edu.ar/handle/123456789/47831 |
| Aporte de: |
| Sumario: | The genus Botrychium (Ophioglossaceae) is comprised of about 30 widely distributed species. Because of their small size
and few, yet variable, morphological characters, many questionable taxa have been described over the years. Since its
description in 1906, B. dusenii has been treated as both a distinct species and variously divided into four taxa: B. lunaria
var. dusenii, B. lunaria var. typicum, B. lunaria var. antarctica, and B. ramosum var. patagonicum (B. matricariaefolium subsp.
patagonicum). The aim of this study is to evaluate the validity of these taxa using spore wall sculpture, spore size, allelic
composition employing enzyme electrophoresis, and morphological characters. We conclude that only one species of
Botrychium occurs in southern South America and recognize this as B. dusenii, a species distinct from B. lunaria. Spore size
and results of enzyme electrophoresis suggest that B. dusenii is an allotetraploid derived through hybridization between a
diploid member of the B. lunaria complex and a diploid member of the B. campestre complex. We provide information about
habitat, distribution, and full exsiccate citations. |
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