On Some Poorly Known Hybrids of Rhododendron berzogii (Ericaceae) in New Guinea

摘要

Putative natural hybrids between Rhododendron herzogiiWaib. andsympatric species are presented based on herbarium specimens and field observations. Four hybrids were until now recognized as species: R xpsammogenes Sleumer (pro sp.) = R. herzogii x R macgregoriae F.Muell.; R xoreadum Wernham (pro sp.) = R herzogii x R zoelleri Warb.; R. xkawir Danet (pro sp.) = R gardenia Schltr. x R herzogii; R xpsammogenes Sleumer var. inundatum (Sleumer) Danet, stat. nov. is proposed; this variety appears to have resulted due to back-crossing. R xdiversiflorum Danet, nothosp. nov. is described; putatively this has resulted from hybridization between R herzogii and R pachystigma Sleumer.