De Candolle (1830) divided the genus Campanula into two large sections on basis of the
presence or absence of calyx-appendages between the calyx-lobes. Boissier (1875) attached …

(.Botanical and Herbarium, Utrecht) Cytogeographic investigations of different plant species
have greatly understanding approp Page 1 Acta Botanica Neerlandica 12 (1963) 195-230 195 …

Five species are recognized inHieracium subgen.Pilosella sect.Pilosellina Fries. Four are
diploid (2x, 2n = 18), one (H. pilosella L.) is highly variable morphologically and cytologically (…

A cytological analysis of 1192 artificially produced hybrids in the collective apo-amphimictic
species complex, Hieracium pilosella/H. peleterianum, showed that 16 addition hybrids were …

Materials and methods Some plants were transferred from their natural habitat to the experi-mental
plot, but in many other cases the plants were grown from seeds collected in nature. In …

1. The chromosome numbers of 38 species belonging to 11 genera of the tribe
Campanuleae of Schönland’s system were determined. 13 of these species had not yet been …

The chromosome numbers of 31 species of Angiospermae collected in S. Brazil were determined.
Of these species 5 were studied before, the other numbers are new, 11 are first counts …

Cytotaxonomic Investigations in Some Angiosperms Collected in the Valley of Aosta and in Tre
National Park « Gran Paradiso » Page 1 CYTOTAXONOMIC INVESTIGATIONS IN SOME …

In the present paper, the third in this series, the chromosome numbers of 46 species of
Angiospermae occurring in the Netherlands, are listed. A comparison of our results with data …

(.Botanical Herbarium, Utrecht) samples or germinated, and the seedlings, as University of
Utrecht, “Cantonspark” in Baarn. Page 1 Acta Botanica Nterlandica 15 (1966) 484—489 484 …