Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species

• DOI: 10.15553/c2020v752a4
• Publication Date: 2020-10-29T13:39:26Z
• Authors: Margaret M. Hanes; George E. Schatz; Martin W. Callmander
• Keywords: Hibiscus; Herbarium

Hanes, M.M., G.E. Schatz & M.W. Callmander (2020). Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description four new species. Candollea 75: 193–202. In English, English French abstracts.Two species genus Hochr. are transferred L. two combinations proposed: calyculatus (Hochr.) M. Callm. involucratus Hanes The monotypic its single cardiostegius was defined as a taxon in bud stage represented unopened flowering collections laurinus Baill. Several recent herbarium from eastern humid forest Madagascar represent restricted range species: ambanitazensis Schatz, analalavensis ankeranensis vohipahensis Schatz. Each documented by field photographs their geographic distribution is presented. Risk extinction assessments seven discussed indicate three taxa threatened "Critically Endangered", "Least concern".