Entada louvelii (R. Vig.) Brenan, Kew Bull. 20: 365. 1966.

O'Donnell, Shawn A., Ringelberg, Jens J. & Lewis, Gwilym P., 2022, Re-circumscription of the mimosoid genus Entada including new combinations for all species of the phylogenetically nested Elephantorrhiza (Leguminosae, Caesalpinioideae, mimosoid clade), PhytoKeys 205, pp. 99-145 : 99

Entada louvelii (R. Vig.) Brenan, Kew Bull. 20: 365. 1966.

Type.

MADAGASCAR. Analamazoatra, south of Moramanga , M. Louvel 16 (lectotype: P [P00452896], designated by J.-F. Villiers in Leguminosae of Madagascar, 2002: 165) .

Basionym.

Entada pervillei (Vatke) R. Vig. var. Entada pervillei louvelii R. Vig., Notul. Syst. (Paris) 13: 347. 1949.

Description.

Tree 10-15 m tall, with elevated nectaries at nodes (Fig. 4B ). Leaves: petiole 2-4 cm long, grooved above; rachis 9-18 cm long, winged, no tendril; pinnae 11-20 pairs per leaf, 3-9 cm long, with 24-46 pairs of leaflets; leaflets 3-7 × 1-1.75 mm, oblong to oblong-elliptic, apex rounded-obtuse to sub-acute and mucronate, base asymmetric and sub-truncate; lamina glabrous (Fig. 16A, B, D ). Inflorescence: a terminal panicle of spikes, each spike 5-19 cm long, rachis pubescent (Fig. 16A, B ). Flowers: white, 4-5 mm long, sessile to sub-sessile; calyx cream-coloured, obconical, 1.5-2 mm long, shallowly toothed, glabrous; petals 3.5-4 mm long; stamen filaments 5-7.25 mm long (Fig. 16C ). Fruit: a torulose, laterally compressed craspedium, 15-20 × 3-6.5 cm, with transverse septa between seeds dividing the fruit into one-seeded segments which, upon ripening, fall from the persistent replum (Fig. 16D ). Seeds: elliptic, 1.5-2.4 × 0.6-1.2 cm, light brown, pleurogram lacking.

Distribution.

Madagascar (east).

Habitat and ecology.

Moist forest, up to 1000 m alt. ( Villiers 2002, p. 167); disturbed or dry forest ( Lungu 1995).

Figures

Figure 4. Putative extrafloral nectaries on herbarium specimens of five of the six native Madagascan species of Entada A E. leptostachya, Du Puy et al. M 235 B E. louvelii, Reserves Naturelles RN 1447 C E. pervillei, Service Forestier 10525 _ SF D E. pervillei, Service Forestier 11481 _ SF E E. rheedei, Gautier LG 3153 F E. tuberosa, Jongkind et al. 3264. Scale bars: 2 mm (A-F). Photos: S O'Donnell.

Figure 16. Entada louvelii vegetative and reproductive structures. A branch and shoots bearing leaves and terminal panicles of spikes, Madagascar (photo: P Antilahimena CC BY-NC-ND 3.0, MBG (2021)) B terminal panicle of flower spikes, Madagascar (photo: D Du Puy) C spikes bearing open, sessile flowers and closed flower buds, Madagascar (photo: D Du Puy) D leaves and fruits nearing maturity, Madagascar (photo: D Du Puy).