Tibouchina gaudichaudiana ( Candolle 1828: 128 ) Baillon (1879: 7)

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 : 82-84

7.3. Tibouchina gaudichaudiana ( Candolle 1828: 128) Baillon (1879: 7) . [ Figs. 3t –u , 10a–f ]

Shrubs 0.5–3 m; indumentum of the branches, petioles, inflorescences, hypanthium and calyx glandular-setose and/or -setulose, glandular head caducous or not. Branches tetragonal, not winged. Petioles 0.3–1.2 cm long; blades 3–11 × 1.4–4.5 cm, chartaceous, elliptic or narrowly ovate, sometimes oblong, base obtuse to acute, apex acute, sometimes obtuse, margin entire; adaxial surface densely setose, abaxial surface densely setose at the veins and with fine trichomes at the blade; acrodromous basal veins 5, with additional faint marginal pair. Thyrsoids 3.7–22.5 cm long, terminals; bracts foliaceous 15–44 × 4–17 mm; bracts not foliaceous 7–8 × 1.1–1.2 mm, thick, concave, oblong, caducous; bracteoles 3–10 × 1.9–6 mm, elliptic, caducous. Pedicel 1.1–7 mm long; hypanthium 5–11 × 3–5.5 mm, campanulate; calyx with lobes 2.9–5 × 1.8–3.5 mm, caducous, triangular, margin ciliolate; petals 16–25 × 10–16 mm, lilac, apex rounded-apiculate, margin glandular-ciliolate; stamens with filaments basally glandular, anthers purple, falciform, connective prolonged, appendage bilobed, glandular, antesepalous with filaments 13–15 mm long, anthers 13–17 mm long, connective 1.3–1.8 mm prolonged, antepetalous with filaments 9–12 mm long, anthers 11–12 mm long, connective ca. 0.5 mm prolonged; ovary 2–7.5 × 2.5–5 mm, glandular-setose, glandular head caducous or not; style 1–3.1 cm long, basally glandular-pubescent, glandular head caducous or not. Ruptidium 4–13 × 5–7 mm; seeds 0.2–1 × 0.1–0.7 mm.

Specimens examined:— 4.I.1999, fl., L.F.T. Menezes 198 (RB, RBR) ; 15.IV.2000, fl., fr., M. Conde 478 (RBR) ; 23.XII.2000, fl., M.C. Souza 152 (RBR) ; 3.I.2002, fl., fr., L.F.T. Menezes 892 (RBR) ; 19.I.2002, fl., fr., L.F.T. Menezes 937 (RBR) ; 27.XII.2002, fl., L.F.T Menezes 1044 (RBR) ; 23.XII.2004, fl., fr., L.F.T. Menezes 1312 (RBR) ; 29.XII.2004, fl., L.F.T. Menezes 1325 (RBR) ; 23.XII.2005, fl., F.C. Nettesheim 165 (RBR) ; 7.IV.2007, fl., fr., K.C. Silva 6 (RBR) ; 7.IV.2007, fl., fr., K.C. Silva 11 (RB, RBR) ; 23.II.2008, fl., fr., K.C. Silva 21 (RB, RBR) ; 23.II.2008, fl., fr., K.C. Silva 22 (RB, RBR) ; 23.II.2008, fl., K.C. Silva 23 (RBR) ; 23.II.2008, fl., K.C. Silva 26 (RB, RBR) ; 23.II.2008, fl., K.C. Silva 27 (RB, RBR) ; 4.III.2008, fr., K.C. Silva 30 (RBR) ; 4.III.2008, fl., fr., K.C. Silva 31 (RB, RBR) ; 5.III.2008, fl., K.C. Silva 33 (RB, RBR) ; 9.I.2010, fl., K.C. Silva 65 (RBR) ; 15.I.2010, fl., K.C. Silva 74 (RBR) .

Distribution:—Endemic to the state of Rio de Janeiro in the Atlantic Forest Biome ( Guimarães 2012).

Comments:—In Marambaia, it is the only species of Melastomataceae found in four major vegetation types: Herbaceous and Shrubby Restinga, Restinga Forest, and Dense Submontane Ombrophilous Forest. It is distinguished by the setose- and/or glandular-setulose indumentum and the basally glandular filaments. Morphological variation in leaf length of the leaves between individuals growing in forest (6–11 cm long) and restinga (3–7.7 cm long) environments is clear. Conde et al. (2005) listed Tibouchina litoralis Ule (1915: 351) , T. reichardtiana Cogniaux (1885: 361) and T. urceolaris (Schr. & Mart. ex Candolle 1828: 139) Cogniaux (1885: 355) for Marambaia based on RBR herbarium material. Additional illustrations in Baillon (1879) and Guimarães (1997).

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 10. Tibouchina gaudichaudiana: a. hypanthium and calyx; b–c. antisepalous and antipetalous stamens, respectively; d. bract; e. fruit; f. seeds (a, d. Silva 27; b–c. Souza 152; e–f. Silva 30). Tibouchina heteromalla: g. hypanthium and calyx; h. bract; i–j. antisepalous and antipetalous stamens, respectively; k. fruit (g, i–k. Silva 79; h. Nadruz 2119). Tibouchina trichopoda: l. floriferous branch; m–n. leaf: adaxial and abaxial surfaces, respectively; o. bract; p. bracteole; q. petal; r. calyx lobes; s–t. antisepalous and antipetalous stamens, respectively; u. fruit (Silva 106).