Tibouchina estrellensis ( Raddi 1829: 388 ) Cogniaux (1885: 342)

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 : 82

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https://doi.org/ 10.11646/phytotaxa.183.2.1



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Tibouchina estrellensis ( Raddi 1829: 388 ) Cogniaux (1885: 342)


7.2. Tibouchina estrellensis ( Raddi 1829: 388) Cogniaux (1885: 342) . [ Figs. 3s View FIGURE 3 , 9k–n View FIGURE 9 ]

Trees 10–15 m; indumentum of the branches, petioles and inflorescences sparsely to densely strigose to strigulose, hispidulous and furfuraceous-dendritic. Branches tetragonal, slightly to sharply winged. Petioles 0.9–2.3 cm long; blade 11.6–13.3 × 3.9–5.5 cm, chartaceous, elliptic, base obtuse to rounded-cuneate, apex obtuse-acuminate, margin obscureundulate, appressed-ciliolate; adaxial surface bullate, moderately strigose, the trichomes basally thickened and manybranched, branches connate to the epiderm, abaxial surface foveolate, densely setulose-dendritic; acrodromous veins 5, the inner basal, the marginal suprabasal and diverging from the inner, hispidulous-dendritic, trichomes appressed, at abaxial surface. Thyrsoids 10.9–16.7 cm long; bracts foliaceous 12–39 × 5–16 mm; bracts not foliaceous 15–16 × 4–7 mm, thick, concave, elliptic, early-caducous; bracteoles 9–18 × 5–11 mm, concave, ovate, caducous. Pedicel 6–7 mm long; hypanthium 6.5–7 × 3.8–4 mm, campanulate, densely strigulose-dendritic, the trichomes appressed; calyx with lobes 4.8–10 × 3.4–5 mm, caducous, triangular, abaxial surface hispidulous; petals 18–28 × 13–16 mm, purple, apex rounded-asymmetric, apiculate; stamens with filaments 1/2–2/3-superior glandular-villous, glandular head caducous, anthers purple, slightly falciform, connective with appendage bilobed, antesepalous with filaments 9–10 mm long, anthers 11–12 mm long, connective 0.8–1 mm prolonged, antepetalous with filaments 9–10 mm long, anthers 11–12 mm long, connective 0.1–0.2 mm prolonged; ovary 5–11 × 3.5–4 mm, sericeo; style 23–24 mm long, setose. Velatidium 9–11 × 6–7 mm; seeds 0.9–1.1 × 0.1–0.3 mm.

Specimens examined:— 15.IV.2000, fl., fr., M. Conde 459 (RB, RBR) ; 15.IV.2006, fr., F.C. Nettesheim s.n. ( RBR 22528 View Materials ) ; 7.IV.2007, fl., K.C. Silva 8 (RB, RBR) .

Distribution:—Endemic to Brazil in the Atlantic Forest Biome, in the states of Minas Gerais, Espírito Santo, Rio de Janeiro, and São Paulo ( Guimarães 2012).

Comments:—In Marambaia, T. estrellensis is restricted to Dense Submontane Ombrophilous Forest. This species is distinguished mainly by branches slightly to sharply winged, leaves with a bullate adaxial surface and the manybranched trichomes at the base, and foveolate abaxial surface. Tibouchina estrellensis is very close to T. granulosa which differs by the flat leaves on both surfaces and the presence of basal 1–2-branched strigose trichomes on the adaxial surface. Additional illustrations in Cogniaux (1885), Guimarães (1997), and Baumgratz et al. (2006).