Hibiscus involucratus (Hochr.) M. Hanes, G.E. Schatz & Callm., 2020

Hanes, Margaret M., Schatz, George E. & Callmander, Martin W., 2020, Transfer of the Malagasy genera Humbertianthus and Macrostelia to Hibiscus (Malvaceae) with description of four new species, Candollea 75 (2), pp. 193-202 : 196

publication ID

https://doi.org/ 10.15553/c2020v752a4

DOI

https://doi.org/10.5281/zenodo.5708685

persistent identifier

https://treatment.plazi.org/id/190687BC-5A7D-447B-A235-631AF0D0628B

treatment provided by

Carolina

scientific name

Hibiscus involucratus (Hochr.) M. Hanes, G.E. Schatz & Callm.
status

comb. nov.

Hibiscus involucratus (Hochr.) M. Hanes, G.E. Schatz & Callm. , comb. nov.

Macrostelia involucrata Hochr. in Notul. Syst. (Paris) 14: 230. 1952.

Holotypus: MADAGASCAR. Reg. Atsimo-Atsinanana [Prov. Fianarantsoa]: Vondrozo, [22°49'S 47 °19'E], 11.IX.1926, fl., Decary 5257 ( P [ P00037126 ]!; iso-: G [ G00014442 ]!, P [ P00365083 , P00037127 ]!, TEF) GoogleMaps .

Distribution and ecology. – Hibiscus involucratus is known from the low elevation tropical evergreen forests around Vondrozo at c. 450 m elevation ( Fig. 2 View Fig ).

Conservation status. – Hibiscus involucratus is known only from a single location near Vondrozo, collected in 1926. It is possible that the collection has been made in what is now known as the Ambositra-Vondrozo protected area. With a single collection in the low elevation moist evergreen forests, which are highly threatened in Madagascar, this species is assigned a conservation status of “Critically Endangered” [CR B2ab(iii)] using the IUCN Red List Categories and Criteria ( IUCN, 2012).

Notes. – Hibiscus involucratus can be distinguished from all other pendent Hibiscus in Madagascar by its tubular epicalyx with 6 irregular teeth that completely hides the calyx.

We consider the sheet [P00037126] as the holotype, as it is the only specimen with Hochreutiner’s handwriting in P.

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

G

Conservatoire et Jardin botaniques de la Ville de Genève

TEF

Centre National de la Recherche Appliquée au Developement Rural

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Malvales

Family

Malvaceae

Genus

Hibiscus

Loc

Hibiscus involucratus (Hochr.) M. Hanes, G.E. Schatz & Callm.

Hanes, Margaret M., Schatz, George E. & Callmander, Martin W. 2020
2020
Loc

Hibiscus involucratus (Hochr.) M. Hanes, G.E. Schatz & Callm.

Hochr. 1952: 230
1952