A taxonomic revision of the genus Noronhia Stadtm. ex Thouars (Oleaceae) in Madagascar and the Comoro Islands Hong-Wa, Cynthia Boissiera 2016 2016-10-21 70 1 292 8WYR6 Hong-Wa [501,760,380,408] Magnoliopsida Oleaceae Noronhia Plantae Lamiales 119 119 Tracheophyta species greeniana   Typus: MADAGASCAR. Prov. Antsiranana: DIANA, Diégo II, Ramena, Andavakoera, Montagne des Françaisaux env. du Fort, 12°19’18’’S 49°20’16’’E,  270 m,  29.XII.2008, Hong-Wa 549(holo-: MO-6615558!; iso-: P!, TAN!).   Diagnosis   Noronhia greenianaHong-Wa can be distinguished from other congeneric species by its somewhat tortuous habit, its oblate leaf blades and its solitary, punctate and rostellate fruits.   Description  Treesto 8 mtall, trunk to 20 cmin diam.; young twigs cylindrical, 0.6-1.2 mmin diam., glabrous; bark light gray, rugose. Leavesopposite, semi-deciduous; bud scales rarely persistent; blades light green above and below, oblate, 2.5-3.5 3 1.5-3 cm, subcoriaceous, glabrous, domatia common, base attenuate, margin flat, apex shortly cuspidate, the cusp 0.5-2 mmlong, midrib slightly sunken above, distinctly raised above, secondary veins barely visible, 5-8 per side, 4-9 mmapart, looping 1.5-3 mmfrom the margin; petiole yellowish, 4-7 3 0.7-1 mm, not woody, glabrous. Flowersunseen, but fruits solitary. Fruiting pedicel1-6 3 1-3 mm; young fruits green, purplish when mature, ovoid, 16-23 3 10-15 mm, surface covered with white dots, apex rostellate, the rostellum slightly flattened, ridged, truncate, with the persistent style; dry pericarp 0.9-1.6 mmthick; endocarp woody; seed 9-14.5 3 5-9 mm.   Etymology This name honors the late Peter S. Green, who was a Keeper and Deputy Director at the Royal Botanic Gardens, Kew for his contribution to the knowledge of the Malagasy  Oleaceaeand the olive familyin general, most of which he completed after his retirement in 1982 until his passing in 2009.   Distribution, ecology and phenology   Noronhia greenianaoccurs in low-elevation dry forests on sandstones and basement rocks in the north, from Montagne des Français to Daraina ( Fig. 19). It fruits from September to December.   Conservation status   Noronhia greenianais currently known only from four collections representing four localities and has an EOO of 765 km 2, an AOO of 16 km 2, and four subpopulations representing three locations, of which two occur within the network of protected areas (Loky-Manambato and Montagne des Français). These protected areas have just been established and are still subject to some typesof degradation as a result of illicit exploitation. Continuing decline is also projected at one of the other locations due to wood harvesting, forest conversion and artisanal mining. Therefore,  N. greenianais assigned a preliminary status of “Endangered” [EN B1ab(iii)+2ab(iii)].   Notes   Noronhia greenianamost closely resembles  N. divaricata, from which it differs by its semi-deciduous (vs. persistent), oblate (vs. elliptic to rhombic) and cuspidate (vs. rounded to acute) leaves, and by its punctate and rostellate (vs. smooth and apiculate) fruits.    Paratypi   MADAGASCAR. Prov. Antsiranana: Andavakoera, Andranonankomba, Montagne des Français, 12°21’00”S 49°21’34”E,  112 m,  8.IX.2004, Randrianaivo et al. 1085( CNARP, MO, TAN);  Daraina, forêt d’Ampondrabe, 12°57’40”S 49°42’19”E,  340 m,  8.IV.2004, Ranirison 581(Daraina, G, K, MO, TEF);  Daraina, Befarafara, Solanampilana, 13°05’56”S 49°35’29”E,  110 m,  16.XI.2005, Ratovoson et al. 1102( CNARP, G, MO, P, TAN). 4023240860 2008-12-29 MO Hong-Wa Madagascar 270 -12.321667 Antsiranana 21 49.337776 119 119 6615558 1 Antsiranana holotype 4023240527 [899,1081,689,716] 2008-12-29 P, TAN Hong-Wa Madagascar 270 -12.321667 Montagne des Francais 21 49.337776 119 119 1 Antsiranana isotype 4023240587 2004-09-08 CNARP, MO, TAN Madagascar Andavakoera 112 -12.35 Montagne des Francais 21 49.359444 Andranonankomba 121 121 1 Antsiranana 4023241144 2004-04-08 G, K, MO, TEF Madagascar 340 -12.961111 d'Ampondrabe 21 49.70528 Daraina 121 121 1 4023241184 2005-11-16 CNARP, G, MO, P, TAN Madagascar Daraina 110 -13.098888 Solanampilana 21 49.59139 Befarafara 121 121 1