Leandra acutiflora ( Naudin 1851: 371 ) Cogniaux (1886: 162–163)

Silva-Gonçalves, Kelly Cristina Da, Baumgratz, José Fernando A. & Nunes-Freitas, André Felippe, 2014, Melastomataceae in a continental Atlantic Forest island from southeastern Brazil, Phytotaxa 183 (2), pp. 61-92 : 69-71

3.1. Leandra acutiflora ( Naudin 1851: 371) Cogniaux (1886: 162–163) . [ Figs. 5a–c ]

Shrubs or treelets 3–3.5 m, apparently glabrous; indumentum sparse to moderately furfuraceous-stellulate, the trichomes early-caducous. Petioles 1.8–2 cm long; blade 7.5–11 × 2.3–3.2 cm, chartaceous, elliptic, base acute, apex acuminate, margin entire, abaxial surface also sparsely setulose in acrodromous veins; acrodromous veins 3–5, 7– 11 mm suprabasal; primary-axillary hair-tuft domatia in abaxial surface. Thyrsoids with no branchlets of scorpyoid cymes, 4.4–10.2 cm long; bracts 0.2–0.3 × 0.8–0.9 mm, bracteoles 0.1–0.2 × ca. 0.5 mm, both triangular-acuminate, not involucral. Flowers 5-merous; pedicelate; hypanthium 1–1.5 × 2–2.1 mm, campanulate; inner torus glandularsetulose, glabrescent; calyx with external lobes 0.4–0.6 × 0.1–0.2 mm, internal lobes 0.9–1 x 0.4–0.9 mm, narrowly triangular; petals 2.1–2.2 × 0.7–1 mm, white, reflex, oblong-attenuate; stamens with filaments 1–1.1 mm long; anthers 1.1–1.2 mm long, straight, connective 0.1–0.2 mm prolonged, unappendaged or with dorsal inconspicuous calcar; ovary 1.2–1.3 × 2.2–2.3 mm, almost completely inferior, 3-celled, glabrous; style 4–4.1 mm long. Bacidium 2.5–3 × 2.6–3 mm, light-purple, oblong; seeds 0.6–0.8 × 0.5–1 mm, obtriangular, testa granulose.

Specimen examined:— 15.V.2010, fr., K.C. Silva & F.S. Gonçalves 96 (RBR) .

Additional specimens examined:— BRASIL. Rio de Janeiro: Guanabara , 1.VII.1971, fl., D. Sucre 8026 (RB) .

Distribution:—Endemic to Brazil, occurring from the state of Minas Gerais to Santa Catarina, and in Cerrado and Atlantic Forest Biomes ( Souza & Baumgratz 2012a). It is categorized as Vulnerable in the municipality of Rio de Janeiro ( Baumgratz 2000).

Comments:—This is the first record for Marambaia. Leandra acutiflora occurs only in Dense Submontane Ombrophilous Forest, in very wet areas at about 641 m. The indumentum is apparently absent, since the stellulate trichomes are inconspicuous and become early caducous. Additional illustrations in Brade (1960), Camargo et al. (2009), and Souza & Baumgratz (2009).

Figures

FIGURE 5. Leandra acutiflora: a. leaf:abaxial surface; b.calyx; c. petal (Lima & Silva s.n. RB 44251).Leandra variabilis: d.leaf:abaxial surface; e–f. leaf: adaxial and abaxial surfaces, respectively; g. hypanthium and calyx; h. petal (Neto 1506). Leandra melastomoides: i. leaves; j. floral involucre and flower; k. petal; l. bract: adaxial surface (Baumgratz 1073). Leandra reversa: m. floriferous branch; n. petal; o. calyx lobe; p. young fruit; q. seed (m–o. Pessoa & Abbas 1054; n. Bacellar et al. 17; p. Luchiari 715; q. Brade 1433).