Noronhia similis, Hong-Wa, 2016

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 : 247-248

publication ID 10.5281/zenodo.7599432


persistent identifier

treatment provided by


scientific name

Noronhia similis


77. Noronhia similis View in CoL Hong-Wa, spec. nova ( Fig. 61 View Fig ).

Typus: MADAGASCAR. Prov. Antsiranana: DIANA , Massif du Tsaratanana, [13°49’S 48°44’E], 2100 m, XI.1966, Morat 2264 (holo-: MO-6149642!; iso-: P [ P00701309 , P03559031 ]!, TAN!) GoogleMaps .


Noronhia similis Hong-Wa can be distinguished from other members of the genus by its obovate leaf blades that are somehow tinged golden, sericeous to glabrescent at maturity, and its compact inflorescences with greenish white flowers.


Trees to 10 m tall; young twigs flattened, 1.5-4.5 mm diameter, glabrous; bark light gray, rugose. Leaves opposite, persistent; bud scales deciduous; blades dark green above, lighter below, obovate, 5-11.5 3 3-5.5 cm, subcoriaceous, glabrous to sericeous, domatia casual, base rounded, margin flat, apex rounded to slightly acute, the point 1-3 mm long, midrib slightly sunken above, distinctly raised below, secondary veins conspicuous, 7-10 per side, 8-20 mm apart, looping 2-9 mm from the margin; petiole brownish, 5-13 3 1-2.5 mm, usually entirely woody, glabrous. Thyrses solitary to geminate, multiflorous, compact; peduncle 5-10 mm long, moderately to sparsely pubescent; pedicel 2-10 mm long, moderately to sparsely pubescent; calyx moderately to sparsely pubescent outside, glabrous inside, lobes triangular, 1-2 3 1-2.5 mm; corolla greenish white, subrotate, 3.5-5 mm long, glabrous on both sides, the tube 0-2.5 mm long, lobes oblong, apex obtuse; corona absent; stamens 2-4 mm long, anthers oblong to ovate, 1.7-2.8 mm long; pistil 2-3 mm long, stigma capitate. Fruiting pedicel 1-2 3 1-1.5 mm; young fruits green, unseen mature, ovoid, 10-11 3 7-8 mm, smooth to rugose, apex bluntly pointed, dry pericarp 0.5 mm thick; endocarp woody.


The resemblance between Noronhia similis and N. broomeana was used as the basis for the specific epithet of the new species described here.

Distribution, ecology and phenology

Noronhia similis occurs in mid- to high-elevations humid forests on basement rocks and quartzites from the Tsaratanana massif to Makira in the north and from Ivohibe RS to Andohahela in the south ( Fig. 62 View Fig ). It has been collected in flowers from October to December.

Conservation status

Based on six collections representing six localities, the assessment indicated an EOO of 68,364 km 2, an AOO of 24 km 2, and six subpopulations representing six locations, all of which occur within protected areas (Analamazaotra, Andohahela, Corridor Ambositra-Vondrozo, Makira, Tsaratanana, and Tsaratanana-Ambohipiraka-Corridor Marojejy). Given the large distribution, number of locations and AOO, whose actual value is likely to exceed the estimated value, N. similis is assigned a preliminary status of “Least Concern”.

248 Boissiera 70


Noronhia similis most closely resembles N. broomeana , but differs from it mainly by its woody (vs. non-woody) petiole, oblong (vs. obovate) leaf blades, and connate (vs. almost free) petals. Obovate leaf blades that are somehow tinged golden, sericeous to glabrescent at maturity, and compact inflorescences with greenish white flowers characterize this new species.


MADAGASCAR. Prov. Antsiranana: Massif du Tsaratanana , vallon d’Ambatoafy, [13°49’S 48°44’E], XI.1966, Morat 2431 ( P, TAN) GoogleMaps ; ibid. loc., haut bassin de la Maevarano , [13°58’12’’S 48°50’24’’E], 1750-2000 m, 6.XI.1966, Service Forestier 24980 ( P, TEF) GoogleMaps . Prov. Fianarantsoa: Ivohibe RS, 22°28’12”S 46°57’36”E, 900 m, 9.X.1997, Rakotomalaza et al. 1393 ( G, MO, P, TAN) GoogleMaps . Prov. Mahajanga: Befandriana-Nord , Matsoandakana , Ambotaharanana Andranomena, 15°07’48”S 49°20’38”E, 1146 m, 15.II.2008, Bernard 836 ( MO, P, TAN) GoogleMaps . Prov. Toamasina: Analamazaotra RS, [18°56’S 48°26’E], 15.X.1953, Service Forestier 8566 ( P, TEF) GoogleMaps ; ibid. loc., [18°56’S 48°26’E], 10.XI.1954, Service Forestier 12162 ( P, TEF) GoogleMaps . Prov. Toliara: Andohahela PN, 24°33’S 46°52’E, 700- 850 m, 2.XII.1989, McPherson 14577 ( K, MO, P, TAN) GoogleMaps .




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


Parc de Tsimbazaza


Centre National de la Recherche Appliquée au Developement Rural


Conservatoire et Jardin botaniques de la Ville de Genève


Missouri Botanical Garden


Royal Botanic Gardens













GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF