Noronhia emarginata (Lam.) Stadtm. ex Thouars.

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: 108-112

publication ID

978-2-8277-0086-8

persistent identifier

http://treatment.plazi.org/id/824F8D54-FFCA-3A65-FE28-FEE6FE34F89A

treatment provided by

Carolina

scientific name

Noronhia emarginata (Lam.) Stadtm. ex Thouars.
status

Gen. Nov.

28. Noronhia emarginata (Lam.) Stadtm. ex Thouars.   , Gen. Nov. Madagasc. 88. 1806 (Fig. 20).

Olea emarginata Lam., Tabl. Encycl. Méthod.   1: 29. 1791.

Noronhia binia Roem. & Schult., Syst. Veg.   1: 72. 1817.

Noronhia chartacea Stadtm. ex Hook.   in Bot. Misc. 2: 167. 1831.

Lectotypus (designated here): MADAGASCAR [Cultivé à l’Isle de France (= Mauritius)]: sine loc., s.d., Stadtmann s.n. (P-LA [ P00356884, P00356885] images seen; isolecto-: G [ G00439907] image seen)   . Syntypi: MADAGASCAR: cultivé à l’Ile de   France, s.d., Martin s.n. ( G [ G00439908, G00439909] images seen)   . MADAGASCAR: sine loc., Noroña s.n. ( G [ G00188773] image seen, P [ P03558859, P03558865]! probable syntypes)   .

Trees to 15 m tall, trunk to 30 cm diameter; young twigs cylindrical, 2-8 mm diameter, glabrous; bark gray to brownish, smooth, with scattered lenticels. Leaves opposite, persistent; bud scales persistent; blades dark green above, lighter below, obovate, 5.5-12 3 3-7.5 cm, very coriaceous, glabrous, domatia absent, base rounded, margin slightly revolute and undulate, apex obcordate to rounded (rarely mucronulate), the mucro 0-2 mm long, midrib flat above, distinctly raised below, secondary veins conspicuous, 5-11 per side, 10-21 mm apart, looping 1.5-4 mm from the margin; petiole dark gray to brown, 5-11 3 1.8-4.3 mm, entirely woody, glabrous. Thyrses geminate to fasciculate, pauciflorous, diffuse; peduncle 5-20 mm long, glabrescent; pedicel 4.5-12 mm long, glabrescent; calyx sparsely pubescent outside, glabrous inside, lobes triangular, 0.7-2 3 0.9-2 mm; corolla yellow, cupuliform to subrotate, 5-8 mm long, glabrous on both sides, the tube 2-4.5 mm long, lobes widely ovate, apex obtuse; corona present, 1.5-2.5 mm long, undivided; stamens 2.5-2.8 mm long, anthers widely oblong, 2-2.4 mm long; pistil 2.5-3 mm long, stigma capitate. Fruiting pedicel 75-14 3 1.5-3 mm; young fruits greenish, purplish black when mature, oblong, 24.5-37 3 17.5- 27 mm, smooth, sometimes covered with a white pellicle, apex flat to bluntly pointed or rostellate; dry pericarp 1.7-4.6 mm thick; endocarp woody; seed 14-25 3 8.5-15 mm.

Noronhia emarginata   occurs mostly in littoral to mid-elevation humid forests in the east, from Sambava to Fort-Dauphin ( Fig. 19). It produces flowers and fruits all year long except in April and May.

With 34 collections representing 34 localities, the assessment indicated an EOO of 97,176 km 2, an AOO of 120 km 2, and 28 subpopulations representing 19 locations, of which 12 occur within protected areas (Agnalazaha, Ambohidena, Antetezana, Betampona, Loky-Manambato, Mandena, Manombo, Masoala, Petriky, Ste Luce, Vohibola, and Zahamena). Although the habitat in which N. emarginata   is found exhibits some types of degradation, there is little likelihood that they will cause substantial decline in the near future. Therefore, N. emarginata   is assigned a preliminary status of “Least Concern”.

Notes

Additional selected specimens examined

Noronhia emarginata   can be recognized by its coriaceous, obovate leaf blades, long-pedunculate inflorescences with yellow flowers, and large, oblong fruits with a thick pericarp. PERRIER DE LA BâTHIE (1949) indicated that the type specimen [ P03558857] was collected by Louis-Marie Aubert du Petit-Thouars in eastern Madagascar   . However, du Petit-Thouars returned from the island with his herbarium in 1802 (ALLORGE, 2003), which certainly postdates Lamarck’s description in 1791. Moreover, LAMARCK (1791: 29) clearly referred to a specimen collected by Joseph Martin (1788-1826), a French botanist from French Guiana   , who also collected on Martinique and Mauritius (STAFLEU & COWAN, 1976-1988: 320)   , as “ex Insula Madagascar ”.

A thorough search of type specimens at G and P revealed several interesting collections. In particular, one of two specimens kept in the P-LA herbarium [ P00356884, P00356885] bears the name Radtmann, which is undoubtedly a mistake for Jean Frédéric Stadtmann (1762-1807), who worked extensively in South Africa and the Malagasy Floristic Region (i.e. Madagascar, the Comoros, and the Mascarenes). Another collection found at   G [ G00439907] has the same handwriting and was annotated as “ Noronhia Stadtman   en l’honneur d’un naturaliste espagnol” ( Fig. 20), which should thus be considered as a duplicate of the P-LA collection. Furthermore, two of Joseph Martin’s collections were found at   G [ G00439908, G00439909] bearing a different handwriting and with only part of the same annotation as the P-LA material [ P00356884]. These collections should also be considered as type material. The specimen Stadtmann s.n. (as Radtmann s.n. in P-LA) is here designated as the lectotype   since it is housed in Lamarck’s original herbarium, and is thus certainly the one he used to describe the species. The specimens Martin s.n. are here considered as syntypes   .

It is also interesting to note that one collection at G [ G 00188773] was made by Francisco Noroña (c. 1748-1788), which explains why Jean Frédéric Stadtmann chose to name this new genus after his Spanish botanist friend, who died in Mauritius shortly after he visited Madagascar (ALLORGE, 2003). During his visit to the Big Island, Noroña collected material that was later acquired by Delessert and is now kept at G (GUILLEMIN, 1833; S TAFLEU & COWAN, 1976-1988: 773). Some of Noroña’s duplicates are also housed at P, where they have been incorporated in various historical collections, and two collections from the Desfontaines herbarium at P may represent duplicates of the G sheet [ P 03558859, P 03558865]. Noroña was very likely the first to collect N. emarginata   in Madagascar and to bring the seeds back to the Jardin de Pamplemousse in Mauritius, where cultivated plants were subsequently sampled by various botanists such as Stadtmann and Martin. The cultivated plant sampled was used by LAMARCK (1791) as the type material for Olea emarginata   before du Petit-Thouars validated the genus Noronhia   in 1806.

MADAGASCAR. Prov. Antsiranana: Sambava, [14°16’S 50°10’E] GoogleMaps   , 9.IV.1967, Service Forestier 27697 ( MO, P, TEF). Prov. Fianarantsoa: Mananjary, [21°13’S 48°21’E], III-IV.1909, Geay 7934 ( P); Bassin inférieur de Matitana GoogleMaps   , X.1911, Perrier de la Bâthie 2382 ( P); Nosy Varika, Ambahy , 20°46’57”S 48°28’54”E GoogleMaps   , 17.XI.2003, Rabevohitra et al. 4829 ( MO, P, TEF); Manombo RS, 23°03’46”S 47°46’15”E, 14 m GoogleMaps   , 24.IX.2005, Rakotonirina et al. 464 ( MO, P, TAN). Prov. Toamasina: Maroantsetra, Anjahana , Andranofotsy , 15°26’08”S 49°49’14”E GoogleMaps   ,

110 Distribution, ecology and phenology

Conservation status

Notes

10 m, 16.VII.2002, Antilahimena 1188 ( G, MO); between Anantoraka and Manambia, 15°30’S 49°39’E GoogleMaps   , 10 m, 12.X.1997, Birkinshaw et al. 506 ( MO, P, TAN); Sainte-Marie , [16°53’S 49°53’E], V.1847, Boivin 1776 ( P); 1 km S of Ambila-Lemaitso, 18°48’S 49°09’E GoogleMaps   , 0-5 m, 7.XI.1988, Miller 3646 ( K, MO, P, TAN); Sainte Marie, Lokintsy , forêt d’Ambohidena , 16°51’11”S 49°57’10”E GoogleMaps   , 1. VI.2004, Rabehevitra et al. 1206 ( G, MO, P, TEF); Masoala PN, Antalavia , 15°47’S 50°02’E GoogleMaps   , 0 m, 20.XI.1994, Rahajasoa et al. 948 ( MO, P, TAN); 6-10 km S of Ambila-Lemaitso, 18°54’S 49°08’E GoogleMaps   , 0-20 m, 6.III.1988, Schatz et al. 1942 ( MO, P, TAN); Brickaville, Ambila , Andranokoditra , [18°36’S 49°15’E], 24.XI.1983, Service Forestier 32510 ( TEF); Andrafetana , Mahatsara , 17°38’S 49°29’E GoogleMaps   , 5. VI.1991, Service Forestier 34304 ( MO, TEF). Prov. Toliara: Fort-Dauphin , Eoala , 25°04’S 46°57’E GoogleMaps   , 0-10 m, 10.III.1989, Dumetz et al. 551 ( MO, P, TAN, TEF); Fort-Dauphin, entre le pic St Louis et la mer   , 1-5 m, 20.IX-6.X.1928, Humbert 5977bis ( P)   ; ibid. loc., 16. II.1955, Humbert 28962 ( P); Petriky , 25°05’S 46°52’E GoogleMaps   , 10 m, 22. I.1990, McPherson et al. 14856 ( G, MO, P, TAN, TEF); Mandena forest , 24°57’S 47°00’E GoogleMaps   , 2-15 m, 23. I.1990, McPherson et al. 14870D ( MO); Ste. Luce , 24°46’S 47°09’E GoogleMaps   , 0-10 m, 17-18. I.1990, Rabevohitra 2162 ( K, MO, P, TAN, TEF); Fort-Dauphin, Scott-Elliot 3050 ( E, K, P); Manafiafy , 24°47’S 47°11’E GoogleMaps   , 17. I.1990, Service Forestier 33391 ( TEF)   .

Noronhia emarginata var. garcinioides H. Perrier   in Mém. Inst. Sci. Madagascar, Sér. B, Biol. Vég. 2: 296. 1949.

Typus: MADAGASCAR. Prov. Mahajanga: haut bassin du Bemarivo, Analamahitso , [16°11’S 48°14’E], 900 m, VIII.1907, Perrier de la Bâthie 4497 (holo-: P [ P00608379]!) GoogleMaps   .

Noronhia emarginata var. garcinioides   occurs in mid-elevation humid forests in the northern High Plateau ( Fig. 19). It has been collected in flowers and fruits in August.

Noronhia emarginata var. garcinioides   is known only from a single location from within a remote protected area (Tampoketsa d’Analamaitso) that is difficult to access. Although degradation can be observed in the areas surrounding the reserve, disturbance is assumed to be minimal within it, with the closest village being 41 km away. Therefore, N. emarginata var. garcinioides   is assigned a preliminary status of “Least Concern”. It is, however, worth noting that this taxon has only been collected once, more than a century ago.

Noronhia emarginata var. garcinioides   differs from the typical variety mostly   by its oblong (vs. obovate) leaf blades and urceolate (vs. cupuliform to subrotate) flowers. It is morphologically intermediate between N. emarginata   and N. edentata   (formerly recognized as a variety of N. emarginata   by PERRIER DE LA BâTHIE, 1949, 1952), and more closely resembles the latter, except for the lack of woody petiole and the length of the corolla (8 vs. 5.5 mm). Noronhia emarginata var. garcinioides   might be a hybrid between N. emarginata   and N. edentata   or a distinct species altogether. Additional material is needed to assess its pattern of variation and ascertain its status.

Fig.20.

IsoLectotype of Noronhia emarginata (Lam.) Thouars  

[Stadtmann s.n., G]

112 Diagnosis

Description

Etymology

Distribution, ecology and phenology

Conservation status

Notes

Paratypi

G

Conservatoire et Jardin botaniques de la Ville de Genève

P

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

DE

Debrecen University

LA

University of California

A

Harvard University - Arnold Arboretum

S

Department of Botany, Swedish Museum of Natural History

MO

Missouri Botanical Garden

TEF

Centre National de la Recherche Appliquée au Developement Rural

TAN

Parc de Tsimbazaza

V

Royal British Columbia Museum - Herbarium

K

Royal Botanic Gardens

VI

Mykotektet, National Veterinary Institute

I

"Alexandru Ioan Cuza" University

E

Royal Botanic Garden Edinburgh

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Lamiales

Family

Oleaceae

Genus

Noronhia

Loc

Noronhia emarginata (Lam.) Stadtm. ex Thouars.

Hong-Wa, Cynthia 2016
2016
Loc

Noronhia emarginata var. garcinioides

H. Perrier 1949: 296
1949
Loc

Noronhia chartacea Stadtm. ex

Hook. 1831: 167
1831