Hibiscus calyculatus (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 : 194-196

publication ID

https://doi.org/ 10.15553/c2020v752a4

DOI

https://doi.org/10.5281/zenodo.5708683

persistent identifier

https://treatment.plazi.org/id/190687BC-5A7F-447B-A165-654DF0E56556

treatment provided by

Carolina

scientific name

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

comb. nov.

Hibiscus calyculatus (Hochr.) M. Hanes, G.E. Schatz & Callm. , comb. nov. ( Fig. 1A View Fig ).

Macrostelia calyculata Hochr. in Notul. Syst. (Paris) 14: 232. 1952.

Holotypus: MADAGASCAR. Reg. Haute Matsiatra [Prov. Fianarantsoa]: vallée Ampamaherana, [21°19'S 47°19'E], [1300 m], 25.V.1949, fl., Service Forestier 2046 ( P [ P00037125 ]!; iso-: G [ G00014441 ]!, TEF) GoogleMaps .

Vernacular name. – “Tsilaitra” (Service Forestier 2046, 14420).

Distribution and ecology. – Hibiscus calyculatus grows in medium elevation moist evergreen forests east of Fianarantsoa, in the massif of Andrambovato, in the Ampamaherana valley and near Kianjavato (D. Scherberich, pers. comm.) from 1155–1300 m in elevation ( Fig. 2 View Fig ).

Conservation status. – Hibiscus calyculatus is known from 3 locations all encompassed in the Protected Area Network (Corridor Forestier Ambositra-Vondrozo and Ranofanana). Despite the very restricted Extent of Occurrence (EOO) of 12 km ² and an Area of Occupancy (AOO) of 8 km ², there appear to be no current threats to H. calyculatus . Thus, the species is assigned a conservation status of “Least Concern” [LC] using the IUCN Red List Categories and Criteria ( IUCN, 2012), with the caution that this status is highly dependent on continued effective protection.

[B: Rasoandriana 89; C: J. Razanatsoa 644] [Photos: A: D. Scherberich; B: P. Antilahimena; C: B. Mashburn]

Notes. – Hibiscus calyculatus is distinguished from all other pendent Hibiscus on Madagascar by its four small (3–4 mm), free, reflexed epicalyx bracts and a distinctive red, tubular calyx.

Additional specimens examined. – MADAGASCAR. Reg. Vatovavy-Fitovinany [Prov. Fianarantsoa]: Massif d’Andrambovato, Tolongoina, Ikongo , 21°30'58"S 47°25'36"E, 1155 m, 28.V.1998, fl., Razafimandimbison 335 ( G, MO, P, TAN, TEX); GoogleMaps Fort Carnot, Andrambovato Station Forestier , Parcelle A-16, [21°31'S 47°25'E], 28.VII.1954, fl., Service Forestier 14420 ( P, TEF) GoogleMaps .

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

MO

Missouri Botanical Garden

TAN

Parc de Tsimbazaza

TEX

University of Texas at Austin

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Malvales

Family

Malvaceae

Genus

Hibiscus

Loc

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

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

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

Hochr. 1952: 232
1952