Willdenowia 37
Willdenowia – Annals of the Botanic Garden and
Botanical Museum Berlin-Dahlem
ISSN 0511-9618
© 2007 BGBM Berlin-Dahlem.
Kilian, N. & Gemeinholzer, B. 2007: Studies in the Compositae of the Arabian Peninsula and Socotra –
7. Erythroseris, a new genus and the previously unknown sister group of Cichorium (Cichorieae subtribe
Cichoriinae).
Willdenowia 37: 283-296.
doi:10.3372/wi.37.37117
Abstract
Two species of Socotra Island and N Somalia, respectively, known as Prenanthes amabilis
and P. somaliensis, are identified by molecular (ITS and matK) and morphological
analyses as the closest relatives to Cichorium, hitherto considered an isolated
genus of the tribe Cichorieae. To accommodate these two species, the new genus
Erythroseris is established, the new combinations E. amabilis and E. somalensis
are validated, and the basionym Tolpis somalensis is neotypified. Morphological
differences and accordances between Cichorium and Erythroseris are discussed.
It is concluded from the micromorphological results that the scaly pappus of
Cichorium is homologous with the setaceous pappus as present in Erythroseris.
A key to the species, illustrations of achenes, pappus and pollen, and a distribution
map of the new genus are given.
Key words
Asteraceae, systematics, nr DNA ITS, cp DNA matK, phylogeny, micromorphology, Somalia, Yemen.
Full text PDF (745 KB) | Supplementary material
