Miconia rubiginosa (Bonpland 1816: 109) De Candolle (1828: 183)

Corrêa, André Luis, Scudeller, Veridiana Vizoni & Goldenberg, Renato, 2017, Melastomataceae in the Reserva de Desenvolvimento Sustentável do Tupé, Amazonas, Brazil, Phytotaxa 323 (2), pp. 101-127 : 122-123

35. Miconia rubiginosa (Bonpland 1816: 109) De Candolle (1828: 183) . ( Figure. 3 Q .)

Trees ca. 12 tall. Dark brown rhytidome. Branches erect, cylindrical, not winged, reddish; branches, petioles, leave abaxial surface, inflorescences, bracteoles, hypanthium and fruits with stellate-long persistent trichomes. Leaves opposite, isophyllous; petioles circular 4.6–5.2 mm long; leaf blades 11.1–11.6 × 4.3–5.1 cm, chartaceous, discolored, symmetrical, elliptical, base rounded, apex acuminate, margins entire and ciliate, adaxial side with stellate-long trichomes on the leaf veins, leaf veins 5, suprabasal; ant domatia absent. Paniculate 12.6–13.8 × 8.2–10.6 cm, terminal; bracts not seen; bracteoles not seen. Flowers 5-merous, sessile; hypanthium ca. 1.8 mm long, campanulate, wrinkled; calyx simple, persistent; lacinia triangular; petals ca. 2.8– 1.6 mm, white, obovate, symmetrical, apex rounded, base attenuate, margins not ciliate, glabrous; stamens 10, heteromorphic, smaller anthers ca. 2.3 mm, larger anthers ca. 2.7 mm long, white, oblong, straight, apex truncate,1 apical pore, connective not prolonged, smaller filaments ca. 2.6 mm long, larger filaments ca. 3.1 mm long, glabrous; ovary ca. 1.2 mm long, half-inferior, 3-locular, glabrous; style ca. 5.5

mm long, straight, glabrous. Berry ca. 2.4 × 3.1 mm, unripe fruit green, ripe fruit blackish; fruits with up to 12 seeds, triangular.

Specimen examined:— BRAZIL. Amazonas, Manaus, RDS-Tupé, 13 June 2004, fr., V.V.Scudeller 1067 (HUAM!).

Additional specimen examined:— BRAZIL. Amazonas , Manaus, 4 March 1955, fl., W. Rodrigues s/n ( INPA 851 !) ; 15 March 1960, fl., J. R. Chagas 1531 ( INPA!) .

Distribution and habitat:— Costa Rica, Panama, Dominican Republic, Puerto Rico, Colombia, Venezuela, Trinidad and Tobago, Guyana, Suriname, Peru, Bolivia ( Goldenberg et al. 2013). In Brazil it occurs in Amazonian Forests and Cerrado ( Goldenberg & Caddah 2015). In the reserve, it occurs on “terra-firme” plateaus on clay soil with a lot of organic matter.

Comments:— This species is rare in the reserve. It can be recognized by the stellate trichomes on both sides of the leaf.

Figures

FIGURE 3. Morphological details of Melastomataceae species in RDS-Tupé: A. Adelobotrys marginata, leaf blade (from Corrêa 278); B. Miconia comptifolia, leaf blade with detail of the margins (from Corrêa 219); C. Tococa subciliata, leaf blade with detail of the margins (from Corrêa 112); D. Clidemia epibaterium, leaf blade with of the detail margins (from Corrêa 215); E. C. heteroneura, leaf base (from Corrêa 140); F. C. japurensis, leaf base (from Corrêa 21); G. Henriettea maroniensis, leaf blade and detail of trichomes on the abaxial surface (from Corrêa 139); H. M. poeppigii, leaf blade and detail of trichomes on the abaxial surface (from Corrêa 280); I. M. umbrosa, leaf base and detail of trichomes on the abaxial surface (from Corrêa 81); J. Tibouchina fothergillae, longitudinal section of the ovary, hypathium and calix (from Corrêa 218); K. M. umbrosa, detail of the ovary and style (from Corrêa 81); L. M. gratissima, transverse section of the ovary (from Corrêa 137); M. Aciotis circaeifolia, petal (from Corrêa,21);N. C. epibaterium, petal (from Ribeiro 932); O. Miconia tomentosa, stamen larger (from Corrêa 47); P. Aciotis acuminifolia, fruit (From Corrêa 102); Q. M. rubiginosa, fruit (from Scudeller 1067); R. Miconia phanerostila, seed (from Herb 96); S. M. lourteigiana, arachnoid trichome (from Corrêa 77I); T. M. crassinervia, dendritic trichome (from Corrêa 248) U. M. poeppigii, stellate trichome (from Corrêa 280); V. Adelobotrys marginata, malpighiaceous tricome (from Corrêa 278).