Noronhia greeniana

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 : 119-121

publication ID

https://doi.org/ 10.5281/zenodo.7599432

DOI

https://doi.org/10.5281/zenodo.7596159

persistent identifier

https://treatment.plazi.org/id/824F8D54-FFD1-3A6C-FE28-FEE6FDC0FCED

treatment provided by

Carolina

scientific name

Noronhia greeniana
status

 

32. Noronhia greeniana View in CoL Hong-Wa, spec. nova ( Fig. 22D View Fig , 23 View Fig ).

Typus: MADAGASCAR. Prov. Antsiranana: DIANA, Diégo II, Ramena, Andavakoera, Montagne des Français aux env. du Fort, 12°19’18’’S 49°20’16’’E, 270 m, 29.XII.2008, Hong-Wa 549 (holo-: MO-6615558!; GoogleMaps iso-: P!, TAN!) GoogleMaps .

Diagnosis

Noronhia greeniana Hong-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

Trees to 8 m tall, trunk to 20 cm in diam.; young twigs cylindrical, 0.6-1.2 mm in diam., glabrous; bark light gray, rugose. Leaves opposite, 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 mm long, midrib slightly sunken above, distinctly raised above, secondary veins barely visible, 5-8 per side, 4-9 mm apart, looping 1.5-3 mm from the margin; petiole yellowish, 4-7 3 0.7-1 mm, not woody, glabrous. Flowers unseen, but fruits solitary. Fruiting pedicel 1-6 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 mm thick; 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 Oleaceae and the olive family in general, most of which he completed after his retirement in 1982 until his passing in 2009.

Distribution, ecology and phenology

Noronhia greeniana occurs in low-elevation dry forests on sandstones and basement rocks in the north, from Montagne des Français to Daraina ( Fig. 19 View Fig ). It fruits from September to December.

Conservation status

Noronhia greeniana is 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 types of 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. greeniana is assigned a preliminary status of “Endangered” [EN B1ab(iii)+2ab(iii)].

120 Boissiera 70

Notes

Noronhia greeniana most 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) GoogleMaps ; Daraina, forêt d’Ampondrabe , 12°57’40”S 49°42’19”E, 340 m, 8.IV.2004, Ranirison 581 (Daraina, G, K, MO, TEF) GoogleMaps ; 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) GoogleMaps .

P

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

TAN

Parc de Tsimbazaza

MO

Missouri Botanical Garden

G

Conservatoire et Jardin botaniques de la Ville de Genève

K

Royal Botanic Gardens

TEF

Centre National de la Recherche Appliquée au Developement Rural

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Lamiales

Family

Oleaceae

Genus

Noronhia

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