Article

Dryopteris affinis subsp. borreri (Pteridophyta: Dryopteridaceae) in the Bulgarian flora

Authors:
Ivanova D.
Publication: Flora Mediterranea
Pages: 201-218
Article history:
Abstract

In the present paper some preliminary results from the biosystematic investigations on Bulgarian Dryopteris are reported. Differences between D. affinis (Lowe) Fraser-Jenk. subsp. borreri (Newman) Fraser-Jenk. and D. filix-mas (L.) Schott as well as illustrations showing some morphological characters of leaves and perispore sculpture are presented. Plants of D. affinis subsp. borreri from 6 localities were checked cytologically. All specimens investigated turned out to be triploid with 2n = 123. This is the first count for the taxon from Bulgaria. D. affinis subsp. borreri in Bulgaria is much rarer than D. filix-mas. A map of distribution is also given. D. affinis subsp. borreri was always found in the presence of D. filix-mas. The habitat requirements are noted.