| Dalbergia emirnensis | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Faboideae |
| Genus: | Dalbergia |
| Species: | D. emirnensis |
| Binomial name | |
| Dalbergia emirnensis | |
| Synonyms [2] | |
Dalbergia emirnensis is a species of legume in the family Fabaceae. It is found only in Madagascar. It is threatened by habitat loss.
D. emirnensis was first formally described by English botanist George Bentham in 1860. [2] The specific epithet "emirnensis" is derived from the word “Emirna" or "Emyrna", an archaic spelling of the name of the Imerina people, within whose territory the type specimen was collected. Two varieties, D. emirnensis var. emirnensis and D. emirnensis var. decaryi, were described in 1996 by Jean Marie Bosser and Raymond Rabevohitra, however, a 2023 paper instead treats D. emirnensis var. decaryi as a subspecies of Dalbergia nemoralis , D. nemoralis subsp. decaryi, on the basis of its morphological and genetic differences from D. emirnensis. The same 2023 paper restricted D. emirnensis to populations labelled as D. emirnensis var. emirnensis and placed Dalbergia campenonii, a species described by Emmanuel Drake del Castillo in 1903, into synonymy with D. emirnensis. [3]
D. emirnensis is known only from the Central Highlands of Madagascar at altitudes of 800–1,500 m (2,600–4,900 ft) above sea level. It is most widespread in the Analamanga region, but can also be found in the northern Alaotra-Mangoro region, the north-eastern corner of the Vakinankaratra region, and in the area where the borders of the Bongolava, Melaky, and Menabe regions meet. It inhabits humid and subhumid remnant forests, wooded grasslands, and secondary thickets in recently burned areas. It is often found along streams and rivers or near forest edges and primarily grows on sandy or rocky ferrallitic soils. [3]
E. emirnensis is a shrub or tree growing to 42 m (138 ft) tall with a trunk diameter of up to 72 cm (28 in). The branches are largely hairless, with dark grey-brown bark and raised white lenticels. The leaves are arranged alternate to one another, each typically bearing 7 to 11 leaflets, though sometimes as few as 5 or as many as 12. The petiole, rachis, and petiolules are yellow-green in colour and covered in fine hairs. Individual leaflets are bright green, ovate to elliptic with a pointed tip, and measure 27–51 mm (1.1–2.0 in) by 12–22 mm (0.47–0.87 in). The upper surface of the leaflets is slightly glossy and mostly hairless, while the underside is matte. The inflorescence is a hairy, dense, and multibranched panicle measuring 5.9–10 cm (2.3–3.9 in) long. [3]
D. emirnensis is known to flower from November to February, during the beginning and middle of the rainy season, and to fruit from January to May. [3]
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