Marcetia taxifolia ( Saint-Hilaire 1823: 150 ) Candolle (1828: 124)

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 : 72-73

4.1. Marcetia taxifolia ( Saint-Hilaire 1823: 150) Candolle (1828: 124) . [ Figs. 3f , 4p–t ]

Subshrubs or shrubs 0.3–1.5 m; indumentum of the branches, leaves, inflorescences, hypanthium and calyx densely glandular-hirtellous. Leaves sessile or petioles 0.5–0.8 mm long; blade 4–5.3 × 0.8–1.2 mm, chartaceous, narrowly elliptic, base cordate-lobate, apex acuminate, margin entire, ciliolate; acrodromous basal veins 3. Flowers 4-merous, solitaries, axillaries, pedicelate; bracteoles 1.6–1.9 × 0.1–0.2 mm, linear, caducous; hypanthium ca. 3 × 2.5–3 mm, campanulate; calyx with lobes 2–3.2 × 1–1.8 mm, narrowly triangular, margin ciliolate, persistent; petals 6.7–8 × 3.1–3.3 mm, rose, elliptic, apex acuminate, glabrous; stamens isomorphic and of two sizes, anthers yellow, slightly falciform, pore terminal, connective not prolonged, appendage thickened and involving the base of the thecae, with or not ventral projections, antesepalous with filaments 7.6–7.8 mm long, anthers 4–4.2 mm long, antepetalous with filaments 6–6.3 mm long, anthers 3.3–3.8 mm long; ovary 2.1–2.3 × ca. 1.5 mm, free inside the hypanthium, 4-celled, glabrous; style 1–1.4 cm long, glabrous. Capsule loculicidal 3.5–4 × 3–3.5 mm, polyspermous; seeds ca. 0.5 × 0.5 mm, cochlear or subcochlear, testa foveolate.

Specimens examined:— 5.VIII.1998, fl., fr., L.F.T. Menezes s.n. (RBR 10269) ; 29.V.1999, fl., fr., L.F.T. Menezes et al. 252 (RBR) ; 11.VI.2004, fl., L.F.T. Menezes et al. s.n. (RBR 7297) ; 5.IV.2008, fr., K.C. Silva 34 (RBR) .

Distribution:—A widely distributed species in South America, occurring in abundance in Venezuela but less frequent in Guyana and Colombia ( Martins 1989, 2009). In Brazil, it is found in the states of Roraima, Ceará, Paraíba, Pernambuco, Alagoas, Sergipe, Bahia, Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo, and Paraná, and in the Distrito Federal ( Martins & Bernardo 2012).

Comments:—In Marambaia, the species occurs in Herbaceous and Shrubby Restinga. It can also be distinguished by the small leaf size (4–5.3 × 0.8–1.2 mm), rose petals, yellow anthers, and the cochlear or subcochlear seeds, with foveolate testa. Additional illustrations in Chiavegatto (2005) and Martins (2009).

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 4. Clidemia hirta: a. flowering branch; b. floral bud; c. calyx lobes; d. petal (Silva 42). Clidemia urceolata: e. flowering branch; f. detail of branch indumentum; g. floral bud; h. petal; i. fruit; j. seed (Silva 50). Huberia ovalifolia: k. leaf: abaxial surface; l. flower; m. calyx; n. disruptive capsule, showing the disruption of hypanthium; o. seed (k. Menezes 826; l–m. Silva 92; n. Silva 32; o. Menezes 826). Marcetia taxifolia: p. floriferous branch; q. antipetalous stamen; r antisepalous stamen; s. fruit: loculicidal capsule; t. seed (Menezes 252).