caa a22 4500 47580662X CHVBK 20180406123748.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/BF00986341 doi (NATIONALLICENCE)springer-10.1007/BF00986341 New chromosome counts in Streptocarpus (Gesneriaceae) from Madagascar and the Comoro Islands and their taxonomic significance [Elektronische Daten] [K. Jong, M. Möller] This study records the chromosome numbers of 10 species ofStreptocarpus; nine of the counts are new. With the exception ofS. buchananii of mainland Africa, all the results are for plants endemic to Madagascar and the Comoro Islands. While there is a strong correlation between basic number and growth form in the two subgenera of the genus on the African mainland (x = 15 among caulescent species in subgenusStreptocarpella; x = 16 among acaulescent species in subgenusStreptocarpus), the situation appears more complex among Madagascan and Comoro Island species. One notable example of deviation from this correlation is shown byS. papangae, a shrubby caulescent species, with 2n = 32 (x = 16). Polyploidy in the genus appears to be absent on mainland Africa, but is present in Madagascar and the Comoro Islands, ranging from tetraploidy to octoploidy. Evolutionary implications of the cytological observations are considered. Springer-Verlag, 2000 Gesneriaceae nationallicence Streptocarpus nationallicence Chromosome numbers nationallicence growth patterns nationallicence taxonomy nationallicence Africa nationallicence Comoro Islands nationallicence Madagascar nationallicence Jong K. Royal Botanic Garden Edinburgh, 20A Inverleith Row, EH3 5LR, Edinburgh, UK aut Möller M. Royal Botanic Garden Edinburgh, 20A Inverleith Row, EH3 5LR, Edinburgh, UK aut Plant Systematics and Evolution Springer-Verlag 224/3-4(2000-09-01), 173-182 0378-2697 224:3-4<173 2000 224 606 https://doi.org/10.1007/BF00986341 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00986341 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jong K. Royal Botanic Garden Edinburgh, 20A Inverleith Row, EH3 5LR, Edinburgh, UK aut NATIONALLICENCE 700 1- Möller M. Royal Botanic Garden Edinburgh, 20A Inverleith Row, EH3 5LR, Edinburgh, UK aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 224/3-4(2000-09-01), 173-182 0378-2697 224:3-4<173 2000 224 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer