Miconia chartacea Triana (1871: 119)

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 : 75-77

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



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Miconia chartacea Triana (1871: 119)


5.4. Miconia chartacea Triana (1871: 119) . [ Figs. 3i View FIGURE 3 , 7a–e View FIGURE 7 ]

Trees 7–9 m; indumentum of the branches, petiole, abaxial surface of foliar blades, inflorescences, bracts, bracteoles, hypanthium and calyx lepidote-stellate, dark brown to rufous, dendritic trichomes absent. Petioles 1.9–3.2 cm long, sharply striated; blade 12.5–19.2 × 2.4–6.1 cm, discolour, chartaceous, elliptic, base acute, apex acute, margin entire to sinuous, revolute; adaxial surface green, furfuraceous-stellulate, glabrescent, abaxial surface rufous, completely covered by the indumentum, epidermic surface not exposed, the trichomes persistent; acrodromous veins 5, 4– 13 mm suprabasal. Thyrsoids of glomerules, with no branchlets of scorpioid cymes, 16.4–17.6 cm long; bracts 0.9–1.1 × 0.7–0.8 mm, bracteoles 0.5–1 × 0.3–0.7 mm, both thick, linear-oblong, apex acute, usually early-caducous. Flowers 5- merous, sessile; hypanthium ca. 1.8 × 1.3 mm, campanulate; calyx inflexed, apparently truncate, caducous, lobes ca. 1 × 1.1 mm, denticulate; petals ca. 2.5 × 1 mm, white, reflex, obovate, apex rounded-emarginate; stamens subisomorphic and subequal in size; filaments ca. 3 mm long; anthers 1.8–2.5 mm long, white, pore terminal-ventral, connective not prolonged, unappendaged or with an inconspicuous dorsal calcar; ovary ca. 0.9 × 1 mm, inferior, 2–3-celled, glabrous; style ca. 4 mm long, glabrous. Baccaceous 3.7–4 × ca. 4 mm, subglobose, sparsely lepidote-stellulate, oligospermous (1–3 seeds); seeds 1.9–2 × 1.8–1.9 mm, suborbicular plano-convex, testa slightly sulcate along the length, smooth.

Specimens examined:— 29.II.2008, ster., R.S. Nunes 23 (RBR) ; 17.V.2008, ster., K.C. Silva 36 (RBR) ; 26.IX.2009, ster., K.C. Silva 54 (RBR) .

Additional specimens examined:— BRASIL. Espírito Santo: Santa Maria de Jetibá , 19.XI.2002, fl., L. Kollmann et al. 5753 (RB); Santa Tereza, 21.I.2003, fr., R.R. Vervloet et al. 1694 (RB) .

Distribution:—Endemic to Brazil, occurring in the states of Goiás, Bahia, Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo, Paraná, and Santa Catarina, and in the Distrito Federal (Goldenberg 2012).

Comments:—This is the first record to Marambaia, where this species is restricted to Dense Submontane Ombrophilous Forest. Although it was not collected in fertile condition, M. chartacea is easily recognized by its lepidote-stellate indumentum and the chartaceous and discoloured leaves, with green adaxial surface, and rufous abaxial surface that is completely covered by the persistent indumentum. It may also be identified by the inflorescences of glomerules and the caducous calyx that isvery reduced in length, inflexed, and apparently truncate. According to Goldenberg (2009), the fruits of M. chartacea have 2–6 large seeds. Additional illustrations in Chiavegatto (2005).