Tibouchina granulosa ( Desrousseaux 1797: 44 ) Cogniaux (1885: 340)

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 : 84

7.4. Tibouchina granulosa ( Desrousseaux 1797: 44) Cogniaux (1885: 340) . [ Figs. 3v , 9o–v ]

Trees ca. 5 m; indumentum of the branches, petioles and inflorescences sparsely to densely strigose to strigulose, hispidulous and furfuraceous-dendritic. Branches tetragonal, slightly or sharply winged. Petioles 0.7–2.1 cm long; blade 11.7–19.6 × 3.5–5.3 cm, chartaceous, base obtuse, apex abtuse-acuminate, margin obscure-undulate, revolute; adaxial surface plane, strigulose to strigose, trichomes appressed, basally thickened and 1–2-branched, branches connate to the epiderm, abaxial surface plane, with blade densely setulose-dendritic; acrodromous veins 5, the inner 4–10 mm suprabasal, the marginal suprabasal and diverging from the inner, hispidulous-dendritic, trichomes appressed, at abaxial surface. Thyrsoids 8.3–12.9 cm long; bracts foliaceous not seen, caducous; bracts not foliaceous 2.3–5.9 × 1.2–1.5 cm, thick, bracteoles 6–8 × 5–12 mm, both navicular, caducous. Pedicel 3.5–5 mm long; hypanthium 7–11 × 5.1–6 mm, campanulate, densely strigulose-dendritic; calyx with lobes 8.1–11 × 2.5–4 mm, caducous, triangular, margin ciliolate; petals 24–31 × 16–21 mm, purple, apex apiculate; stamens with filaments 1/2–2/3-superior glandular-villous, glandular head caducous, anthers pink to purple, slightly falciform, connective with appendage bilobed, glabrous, antesepalous with filaments 1.4–1.5 cm long, anthers 14–15 mm long, connective 1.3–1.9 mm prolonged, antepetalous with filaments 12–13 mm long, anthers 12–13 mm long, connective 0.6–0.8 mm prolonged; ovary 4–6 × 4–5 mm, densely sericeo; style 2.2–2.6 cm long, 1/2-inferior setose. Velatidium 11–12 × 7–7.5 mm; seeds ca. 1 × 0.1–0.3 mm.

Specimens examined:— 17.VI.2003, fl., fr, L.F.T. Menezes 1085 et al. (RBR) ; 7.IV.2007, fl., fr., K.C. Silva 10 (RB, RBR) .

Distribution:—Endemic to Brazil in Atlantic Forest Biome ( Guimarães 1997, 2012). It is practically restricted to the state of Rio de Janeiro because there is only a single specimen collected in the state of São Paulo, near the border between these two states ( Guimarães 1997).

Comments:—In Marambaia, T. granulosa is restricted to Dense Submontane Ombrophilous Forest. It is distinguished mainly by the winged branches, the flat leaves on both surfaces, and the adaxial surface with appressed strigose trichomes, basally thickened, 1–2-branched. Tibouchina granulosa is very close to T. estrellensis , as mentioned previously under the latter species. Additional illustrations in Guimarães (1997), and Baumgratz et al. (2006).

Figures

FIGURE 3. Clidemia hirta (L.) D.Don: a. flower and fruit. Clidemia urceolata: b. flower. Huberia ovalifolia: c. flower; d. fruits. Leandra reversa: e. inflorescence. Marcetia taxifolia: f. flowers. Miconia albicans: g. fruits and floral buds. Miconia calvescens: h. flowers. Miconia chartacea: i. leaves. Miconia cinnamomifolia: j. branches with interpetiolar pseudo-stipules; k. fruits. Miconia cubatanensis: l. inflorescence. Miconia dodecandra: m. fruits. Miconia prasina: n. inflorescence. Miconia pusilliflora: o. inflorescence. Ossaea marginata: p. flowers; q. fruit. Tibouchina corymbosa: r. fruits. Tibouchina estrellensis: s. flower. Tibouchina gaudichaudiana: t. flower; u. fruit. Tibouchina granulosa: v. flower. Tibouchina heteromalla: x. flower. Tibouchina trichopoda: z. flower.

FIGURE 9. Ossaea marginata: a. floriferous branch; b. young fruit; c. seed (a. Silva 18; b–c. Silva 28). Tibouchina corymbosa: d. floriferous branch; e–f. leaf: abaxial and adaxial surfaces, respectively; g. calyx lobes; h. bract; i. fruit; j. seed (d. Guimarães 327; e–g., i–j. Silva 80; h. Cardoso 32). Tibouchina estrellensis: k–l. leaf: adaxial and abaxial surfaces, respectively; m. calyx; n. fruit (Conde 459). Tibouchina granulosa: o. stem node; p–q. leaf: adaxial and abaxial surfaces, respectively; r. tetragonal and winged branch; s. calyx; t. bract: adaxial surface; u. fruit; v. seed (Silva 10).