Cytology of Anchusa and Its Relation to the Taxonomy of the Genus
1932; University of Chicago Press; Volume: 94; Issue: 2 Linguagem: Inglês
10.1086/334304
ISSN1940-1205
Autores Tópico(s)Botanical Research and Chemistry
Resumo1. Anchusa italica and its varieties are shown to be allotetraploids. This is in accord with Johnston's theories of reticular phylogenetic relationships in the Boraginaceae. 2. The following chromosome numbers were found: Anchusa barrelieri 2n = 16, A. capensis 2n = 16, A. hybrida 2n = 16, A. officinalis 2n = 16, A. ochroleuca 2n = 24, A. italica 2n = 32, A. italica vars. Pride of Dover, Dropmore, and Opal 2n = 32, Brunnera macrophylla 2n = 12, and Caryolopha sempervirens 2n = 22. 3. The origin of the triploid seedling of Anchusa ochroleuca is discussed. 4. The removal by Johnston of Brunnera macrophylla from the genus Anchusa is substantiated by the number and character of its somatic chromosomes. 5. The similar systematic treatment of Caryolopha sempervirens is also supported by cytological observation. 6. Johnston's combining the sections Buglossum and Euanchusa is in agreement with their cytological similarity.
Referência(s)