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1 January 2012 Rhytidocaulon elegantissimum Hanacek & Ricanek, a New Species from Yemen
Pavel Hanáček, Miroslav Řičánek
Author Affiliations +
Abstract

In this paper we describe a new species of Rhytidocaulon known from two localities in the Hadramawt Governorate of Yemen in the Arabian Peninsula. This species was seen at the same locality in 2008, on which occasion a new site was also discovered, suggesting that the species is more widespread in this area. We also record R. macrolobum subsp. minimum for the first time from this area. On the basis of our current knowledge, we suggest that the wider surroundings of the Ras Huweira settlement in the Hadramawt Governorate is a centre of Rhytidocaulon diversity in the southern part of the Arabian peninsula. R. elegantissimum differs from R. ciliatum mainly by the longer pedicel, the larger, pale green flowers with more slender corolla lobes and more obviously pentagonal corona.

Pavel Hanáček and Miroslav Řičánek "Rhytidocaulon elegantissimum Hanacek & Ricanek, a New Species from Yemen," Haseltonia 2012(17), 96-100, (1 January 2012). https://doi.org/10.2985/1070-0048-17.1.13
Published: 1 January 2012
KEYWORDS
Apocynaceae
Arabian Peninsula
Asclepiadoideae
Ceropegieae
new species
Rhytidocaulon
YEMEN
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