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
8WYRM
Hong-Wa
[503,741,380,408]
Magnoliopsida
Oleaceae
Noronhia
Plantae
Lamiales
203
203
Tracheophyta
species
patricei
Typus: MADAGASCAR. Prov. Toamasina: Analanjirofo, Ambanizana, along path between Ambanizana-Andranobe, 15°38’29”S 49°57’54”E, 7 m, 25.X.2004, Antilahimena 2959(holo-: MO-6615553!; iso-: G[ G00341616]!, K!, P[ P03532773]!, TAN!).
Diagnosis Noronhia patriceiHong-Wa can be distinguished from its congeners by its three-verticillate, large leaves, its fasciculate infructescences, and its large fruits characterized by a thick pericarp.
Description Treesto 11 mtall, trunk to 16 cmdiameter; young twigs subquadrangular to cylindrical, 5.5-8.6 mmdiameter, glabrous; bark medium gray, rugose. Leavesverticillate, persistent; bud scales persistent; blades medium green above, lighter below, lanceolate, 26-36 3 4.5-9.5 cm, very coriaceous, glabrous, domatia absent, base acute, margin flat, apex acuminate, the acumen 5-12 mmlong, midrib deeply sunken above, distinctly raised below, secondary veins conspicuous, 14-20 per side, 19-40 mmapart, looping 2-7 mmfrom the margin; petiole medium to dark gray, 16-20 3 4-6.5 mm, entirely woody, glabrous. Flowersunseen, but infructescence thyrsoid, fasciculate. Fruitingpedicel 5-11 3 3.5-5 mm; young fruits green, yellow when mature, ovoid to oblong, 25-38 3 19.5-24 mm, surface smooth, sometimes covered with white dots, apex flat to bluntly pointed; dry pericarp 2.2-3 mmthick; endocarp woody; seed 15 3 20 mm.
Etymology Thisspecies is dedicated to Patrice Antilahimena, a botanist at the Missouri Botanical Gardenin Madagascar, for collecting the typespecimen and for keeping an eye out for Noronhiaduring his extensive fieldwork.
Distribution, ecology and phenology Noronhia patriceioccurs in low-elevation humid forests and basement rocks and unconsolidated sands in the Masoala region in northeastern Madagascar( Fig. 36). It fruits from October to June.
Conservation status Noronhia patriceiis currently known only from five collections representing five localities. The assessment resulted in an EOO of 1,023 km 2, an AOO of 20 km 2, and four subpopulations representing four locations, of which two occur within a protected area (Masoala). With decline in habitat quality, habitat loss and reduction of the number of mature individuals likely to continue outside of the protected area as a result of wood harvesting and land conversion, the small EOO and AOO as well as the small number of locations, N. patriceiis assigned a preliminary status of “Endangered” [EN B1ab(i,ii,i ii,iv,v)+2ab(i,ii,iii,iv,v)].
Notes Noronhia patriceiis similar to N. crassiramosabut can be distinguished by its entirely verticillate (vs. verticillate only at the tips of the branches), lanceolate (vs. oblong) leaves, and its ovoid to oblong (vs. subglobose) fruits with a flat (vs. apiculate) apex. Its three-verticillate, large leaves, fasciculate infructescences, and large fruits characterized by a thick pericarp allow for the unambiguous identification of this species.
Paratypi MADAGASCAR. Prov. Antsiranana: Maroantsetra, Anjahana, Ambanizana, 15°37’03”S 49°58’36”E, 200 m, 11.VI.2002, Antilahimena1090( G, MO, P); Antalaha, Ampanavoana, forêt de Faho, [ 15°41’S 50°21’E], 24.IV.1951, Service Forestier87R140( TEF). Prov. Toamasina: Ambatondradama( env. 10 kmau NE d’Ankovona), Navana, 15°17’13”S 50°01’10”E, 500 m, 27.IX-6.X.1997, Ralimanana et al.111( MO, P, TAN); Maroantsetra, Anjahana, Ambanizana, Tampolo(Masoala), 15°43’45”S 49°57’38”E, 10 m, 19.X.2001, Randrianaivo710( MO, P, TAN).
4023240788
2004-10-25
G, K, P, TAN
Madagascar
Typus
7
-15.641389
Ambanizana
21
49.965
Analanjirofo
203
203
G00341616, P03532773
1
Toamasina
4023240558
2002-06-11
G, MO, P
Antilahimena
Madagascar
Prov.
200
-15.6175
Anjahana
21
49.976665
Maroantsetra
205
205
R140
1
Prov. Antsiranana
4023240702
1951-04-24
TEF
Service Forestier
Madagascar
-15.683333
Ampanavoana
1284
50.35
205
205
R140
1
Antalaha
4023240555
1997-09-27
1997-10-06
1997-09-27
MO, P, TAN
Ralimanana et al.
Madagascar
500
-15.286945
Ambatondradama
21
50.019444
Prov.
205
205
1
Prov. Toamasina
4023241435
1997-09-27
1997-10-06
1997-09-27
NE
d'Ankovona & Navana
Madagascar
500
-15.286945
Anjahana
21
50.019444
Prov.
205
205
1
Maroantsetra