Tibouchina heteromalla ( Don 1823: 295 ) Cogniaux (1885: 336)

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 : 84-86

publication ID

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

DOI

https://doi.org/10.5281/zenodo.5149404

persistent identifier

https://treatment.plazi.org/id/8A04314C-FF86-FFB3-FF50-FAB4FD33FEFA

treatment provided by

Felipe

scientific name

Tibouchina heteromalla ( Don 1823: 295 ) Cogniaux (1885: 336)
status

 

7.5. Tibouchina heteromalla ( Don 1823: 295) Cogniaux (1885: 336) . [ Figs. 3x View FIGURE 3 , 10g –k View FIGURE 10 ]

Shrubs ca. 0.5 m; indumentum of the branch, petioles and inflorescences hispidulous-sericeo. Branches tetragonal, not winged. Petioles 2.2–3.4 cm long; blade 10.1–15 × 4.7–8.9 cm, chartaceous or membranaceous, broadly ovate to elliptic, base obtuse-cordate, apex acute, margin entire; adaxial surface bullate, densely sericeo-setulose, the trichomes appressed, abaxial surface foveolate-reticulate, densely villous-sericeo; acrodromous basal veins 5, hispidulous-sericeo and sparsely villous at abaxial surface. Thyrsoids 17.7–24.6 cm long; bracts foliaceous not seen, caducous; bracts not foliaceous 7–8 × ca. 3 mm, thick, slightly concave, elliptic, early-caducous; bracteoles 3.5–4 × 1.4–1.5 mm, concave, elliptic, early-caducous. Pedicel 1.8–2 mm long; hypanthium 3–5 × 2.7–3 mm, tubulose, appressed-sericeo; calyx with lobes ca. 3 × 1.5–1.7 mm, caducous, triangular, margin ciliolate, appressed-sericeo in abaxial surface; petals 8–11 × 7.5–9 mm, purple; stamens with filaments basally glandular-pubescent, anthers lilac, falciform, connective bilobulate, antesepalous with filaments 5.8–6 mm long, anthers 5–6 mm long, connective 1–1.5 mm prolonged, appendage glandular, antepetalous with filaments ca. 4.5 mm long, anthers 4–4.2 mm long, connective 1–1.3 mm prolonged, appendage glabrous, sometimes with one gland; ovary 5–5.5 × 4–5 mm, sericeo; style 7–7.3 mm long, basally setulose. Ruptidium 10–11 × 3.5–4.9 mm; seeds 0.6–0.7 × ca. 0.1 mm.

Specimens examined:— 27.IX.2009, ster., K.C. Silva 57 (RBR) ; 22.I.2010, ster., K.C. Silva 70 (RBR) ; 19.III.2010, fl., fr., K.C. Silva 79 (RBR) .

Distribution:—Endemic to Brazil, occurring in the states of Goiás, Paraíba, Pernambuco, Minas Gerais, Espírito Santo, Rio de Janeiro, and São Paulo ( Guimarães 2012).

Comments:—This is the first record for Marambaia, where it is restricted to Dense Submontane Ombrophilous Forest. Tibouchina heteromalla is distinguished by the bullate adaxial surface that is densely sericeous-setulose, and the reticulate-foveolate abaxial surface that is densely sericeous-villous, with sericeous-hispidulous and sparse-villous acrodromous venation and glandular-pubescent filaments at the base. Additional illustrations in Cogniaux (1883 – 1888), Guimarães (1997), and Baumgratz et al. (2006).