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The genus Dryopteris in the Canary Islands and Azores and the description of two new tetraploid species

Author:
GIBBY, MARY, JERMY, A.C., RASBACH, HELGA, RASBACH, K., REICHSTEIN, T., VIDA, G.
Source:
Botanical journal of the Linnean Society 1977 v.74 no.3 pp. 251-277
ISSN:
0024-4074
Subject:
Dryopteris, botanical gardens, islands, tetraploidy, Azores, Canary Islands
Abstract:
From studies in the field, botanic garden and herbarium we concluded that the following four species of Dryopteris grow on the Canary Islands: D. aemula (n= 41) so far found only on Gomera; D. pseudomas (n= 82, apogamous) similarly recorded only for Gomera; D. oligodonta (n= 41) the most common representative of the genus in the Islands is possibly an old Canary endemic related to some African species; D. guanchica a new tetraploid species (n= 82) hitherto confused with D. austriaca (D. dilatata). On four islands of the Azores the following were found: D. aemula (n= 41); D. azorica (n= 41); D. pseudomas (n= 82, apogamous); and D. crispifolia a new tetraploid species (n= 82) which is very distinct when living but in the dried pressed state is difficult to differentiate from D. austriaca and D. guanchica.
Agid:
463636