Noronhia emarginata var. garcinioides H. Perrier

Hong-Wa, Cynthia, 2016, A taxonomic revision of the genus Noronhia Stadtm. ex Thouars (Oleaceae) in Madagascar and the Comoro Islands, Boissiera 70, pp. 1-292 : 110

Noronhia emarginata var. garcinioides H. Perrier in Mém. Inst. Sci. Madagascar, Sér. B, Biol. Vég. 2: 296. 1949.

Typus: MADAGASCAR. Prov. Mahajanga: haut bassin du Bemarivo, Analamahitso , [16°11’S 48°14’E], 900 m, VIII.1907, Perrier de la Bâthie 4497 (holo-: P [ P00608379 ]!) .

Distribution, ecology and phenology

Noronhia emarginata var. garcinioides occurs in mid-elevation humid forests in the northern High Plateau ( Fig. 19 ). It has been collected in flowers and fruits in August.

Conservation status

Noronhia emarginata var. garcinioides is known only from a single location from within a remote protected area (Tampoketsa d’Analamaitso) that is difficult to access. Although degradation can be observed in the areas surrounding the reserve, disturbance is assumed to be minimal within it, with the closest village being 41 km away. Therefore, N. emarginata var. garcinioides is assigned a preliminary status of “Least Concern”. It is, however, worth noting that this taxon has only been collected once, more than a century ago.

Notes

Noronhia emarginata var. garcinioides differs from the typical variety mostly by its oblong (vs. obovate) leaf blades and urceolate (vs. cupuliform to subrotate) flowers. It is morphologically intermediate between N. emarginata and N. edentata (formerly recognized as a variety of N. emarginata by PERRIER DE LA BâTHIE, 1949, 1952), and more closely resembles the latter, except for the lack of woody petiole and the length of the corolla (8 vs. 5.5 mm). Noronhia emarginata var. garcinioides might be a hybrid between N. emarginata and N. edentata or a distinct species altogether. Additional material is needed to assess its pattern of variation and ascertain its status.

Figures

Fig.19. Distribution maps of species of Noronhia Stadtm.ex Thouars.N.edentata (H.Perrier) Hong-Wa to N.insularis (Labat,M.PignaL & O. PascaL) Hong-Wa & Besnard.