Noronhia decaryana 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: 91-93

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scientific name

Noronhia decaryana H. Perrier


22. Noronhia decaryana H. Perrier   in Mém. Inst. Sci. Madagascar, Sér. B, Biol. Vég. 2: 287. 1949.

Typus: M ADAGASCAR. Prov. Toamasina: Est: S de Moramanga , [18°56’S 48°13’E], 900 m, 15. GoogleMaps   II.1930, Decary 7126 (holo-: P [ P00413222]!; iso-: P [ P00413223, P00413224]!)   .

Trees to 12 m tall, trunk to 15 cm diameter; young twigs cylindrical, 0.7-2.6 mm diameter, glabrous; bark dark to medium gray, smooth to slightly rugose. Leaves opposite, persistent; bud scales persistent; blades dark green above, lighter below, oblong to elliptic, 5-17.5 3 2-7.5 cm, chartaceous, glabrous, domatia rare, base rounded to acute, margin slightly revolute and undulate, apex cuspidate, the cusp 4-21 mm long, midrib sunken above, raised below, secondary veins conspicuous, 6-14 per side, 7-30 mm apart, looping 2-7 mm from the margin; petiole medium to light gray, 3-11 3 0.7-2.7 mm, entirely woody, glabrous. Thyrses fasciculate, pauciflorous, diffuse; peduncle 6-18 mm long, glabrescent; pedicel 6-28 mm long, glabrescent; calyx moderately pubescent outside, glabrous inside, lobes triangular, 1-2.8 x 1-2 mm; corolla orangish-red outside, yellowish inside, urceolate, 4-8 mm long, glabrous on both sides, the tube 1-5 mm long, lobes ovate to triangular, apex acute; corona absent; stamens 1.3-2.8 mm long, anthers oblate to orbicular, 1-1.9 mm long; pistil 2-3.5 mm long, stigma capitate. Fruiting pedicel 4-29 3 0.5-2.2 mm; young fruits green, dark red when mature, ovoid to subglobose, 12.5-20.5 3 8.5-21 mm, surface smooth, sometimes covered with white dots, apex flat, style persistent; dry pericarp 0.4-1.7 mm thick; endocarp crustaceous; seed 6.5-13 3 5-15 mm.

Noronhia decaryana   occurs in low- to high-elevation humid forests, from Tsaratanana in the north to Ivohibe and Manombo in the south ( Fig. 9). It produces flowers and fruits throughout the year.

Based on 21 collections representing 19 localities, the assessment resulted in an EOO of 89,050 km 2, an AOO of 76 km 2, and 19 subpopulations representing 14 locations, of which 10 occur within protected areas (Analamazaotra, Anjanaharibe-Sud, Corridor Ambositra-Vondrozo, Corridor Ankeniheny-Zahamena, Manombo, Mantadia, Ranomafana, Tsaratanana, Tsaratanana-Ambohimirahavavy-Corridor Marojejy, and Zahamena). Although some locations are not encompassed within protected areas and are subject to habitat degradation, N. decaryana   is widespread, with an actual AOO likely much larger than 2,000 km 2, and is therefore assigned a preliminary status of “Least Concern”.

92 Notes

Additional specimens examined

Noronhia decaryana   can be recognized by its chartaceous, cuspidate leaf blades, long-pedunculate inflorescences with orangish-red flowers that lack a corona, and crustaceous fruits. It differs from N. cuspidata   by the features discussed under that species and from N. gracilipes H. Perrier   mainly by rarely (vs. frequently) having domatia on the abaxial leaf blades, and by its urceolate (vs. cupuliform to subrotate), orangish-red (vs. pinkish) flowers.

MADAGASCAR. Prov. Antsiranana: Beramanja, Anketrabe Belinta , forêt de Manongarivo-Kalobinono , 13°38’18”S 48°40’29”E, 520 m, 27.IX.2013, Manjato et al. 411 ( DOV, G, MO, P, TAN) GoogleMaps   ; Tsaratanana RNI, Beangona , 14°02’50”S 48°47’09”E, 1100 m, 27.XI.2000, Razakamalala et al. 3 ( MO, P, TAN) GoogleMaps   . Prov. Fianarantsoa: Manombo RS, 23°00’S 47°42’E, 5.III.2009, Hong-Wa et al. 612 ( MO, P, TAN) GoogleMaps   ; Ranomafana PN, Vatoharanana, Parcelle 3, 21°16’06”S 47°25’30”E, 923 m, 8. V.2010, Hong-Wa & Ortiz 671 ( MO, P, TAN) GoogleMaps   . Prov. Toamasina: Moramanga, Ambatovy , Analamay , 18°48’24”S 48°18’31”E, 1119 m, 22.X.2005, Antilahimena et al. 4106 ( MO, P, TAN) GoogleMaps   ; Toamasina, [17°45’S 48°33’E], 1200 m, 29.XII.1944, Cours 2136 ( G, MO, P) GoogleMaps   ; Analamazaotra RS, 18°56’12”S 48°25’09”E, 953 m, 2. V.2010, Hong-Wa & Ortiz 648 ( MO, P, TAN) GoogleMaps   ; Ambatondrazaka , 18°52’S 48°30’E, 985 m, 6-7.III.1992, Noyes et al. 989 ( MO, P) GoogleMaps   ; Ampitambe, forêt d’Analamay , 18°51’22”S 48°19’34”E, 1080 m, 29. VI.1997, Rakotomalaza et al. 1363 ( MO, TAN) GoogleMaps   ; Manakambahiny Est, Zahamena RNI, 17°40’34”S 48°45’32”E, 1351 m, 14.IX.2002, Randrianjanaka et al. 725 ( CNARP, MO, P, TEF) GoogleMaps   ; Brickaville, Maroseranana, Ambodilendemy , 18°25’35”S 48°47’17”E, 1019 m, 21.III.2011, Ravelonarivo & Edmond 3767 ( MO, P, TAN) GoogleMaps   ; Fénérive-Est, Mandifikantsy, Sahatavy , [17°36’42”S 48°54’00”E], 19. I.1956, Réserves Naturelles 7832 ( MO, P) GoogleMaps   .


Distribution, ecology and phenology

Conservation status


Botanische Staatssammlung München


Department of Botany, Swedish Museum of Natural History


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


Delaware State University


Conservatoire et Jardin botaniques de la Ville de Genève


Missouri Botanical Garden


Parc de Tsimbazaza


Royal British Columbia Museum - Herbarium


Mykotektet, National Veterinary Institute


Centre National de la Recherche Appliquée au Developement Rural


"Alexandru Ioan Cuza" University














Noronhia decaryana H. Perrier

Hong-Wa, Cynthia 2016