Tibouchina corymbosa ( Raddi 1829: 124 ) Cogniaux (1885: 363)

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 : 81-82

publication ID

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

persistent identifier

https://treatment.plazi.org/id/8A04314C-FF85-FFBF-FF50-FA7CFD41FE97

treatment provided by

Felipe

scientific name

Tibouchina corymbosa ( Raddi 1829: 124 ) Cogniaux (1885: 363)
status

 

7.1. Tibouchina corymbosa ( Raddi 1829: 124) Cogniaux (1885: 363) . [ Figs. 3r View FIGURE 3 , 9d–j View FIGURE 9 ]

Treelets 2–4 m; indumentum of the branches, leaves, inflorescences, abaxial surface of the bracts, bracteoles and lobes of the calyx appressed-strigose or -estrigulose. Branches flattened to terete, not winged. Petioles 1.2–3 cm long, strigulose; blade 2.7–8.5 × 0.9–3.7 cm, membranaceous, elliptic, base subcordate, apex acuminate, margin entire, slightly undulate, ciliolate; adaxial surface with trichomes basally not thickened nor branched; acrodromous veins 5, the inner basal, the marginal suprabasal and diverging from the inner. Thyrsoids or double dichasia 5.6–6.6 cm long; bracts foliaceous not seen, caducous; bracts not foliaceous 10–11 × 1–1.1 mm, thick, narrowly triangular, adaxial surface glabrous, persistent; bracteoles 6.2–7.8 × 1.5–2 mm, oblong, concave, adaxial surface glabrous, caducous. Pedicel 4.2–9.5 mm; hypanthium 6–7 × 4.1–4.3 mm, tubulose, glandular-strigulose, glandular head caducous; calyx glandular-strigulose, glandular head caducous, lobes 4–4.2 × 1.5–2.2 mm, caducous, triangular, margin ciliolate; petals 18–22 × 10–12 mm, purple, apex truncate; stamens with filaments basally glandular, anthers lilac, slightly falciform, appendage bilobed, antesepalous with filaments 11–12 mm long, anthers 11–12 mm long, connective 1.8–2 mm prolonged, antepetalous with filaments 7.8–8 mm long, anthers 8.8–9 mm long, connective 0.5–0.9 mm prolonged; ovary 4–5.5 × 2.5–3 mm, densely setose at the apex; style 18–23 mm long, glabrous. Velatidium 7–9.5 × 4–7 mm; seeds 0.3–0.5 × 0.05–0.1 mm.

Specimens examined:— 27.IX.2009, ster., K.C. Silva 56 (RBR) ; 19.III.2010, fr., K.C. Silva 80 (RBR) .

Additional specimen examined:— BRASIL. Rio de Janeiro: Itaipuaçu , 14.I.1982, fl., fr., R.H.P. Andreata et al. 377 (RB) .

Distribution:—Endemic to the state of Rio de Janeiro in the Atlantic Forest Biome ( Guimarães 2012). Comments:—This is the first record for Marambaia, where T. corymbosa is restricted to Dense Submontane

Ombrophilous Forest. It can be distinguished by its basally subcordate leaves and the basal glandular filaments.

Additional illustrations in Guimarães (1997).