Miconia tomentosa (Richard 1792: 109) D.Don ex 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 : 123

36. Miconia tomentosa (Richard 1792: 109) D.Don ex De Candolle (1828: 183) . ( Figure 2 U ; 3 O .)

Treelet 4.10–8 m tall. Rhytidome with papyraceous brown to gray blades. Branches erect, cylindrical, not winged, rufous; branches, petioles, leaves abaxial surface, inflorescences, bracts, hypanthium and fruits with dendritic persistent trichomes. Leaves opposite, isophyllous; petioles 3.4–8.1 mm long; leaf blades 23.4–35.6 × 13.6–18.1 mm long, chartaceous, discolored, symmetrical, oval, base attenuate, apex acuminate, margins entire, not ciliate, adaxial side with dendritic trichomes on old leaves over the veins, leaf veins 5, suprabasal. Paniculate 16.1–24.6 × 5.8–7.3 cm, terminal; bracts 3.3–5.4 mm long, linear, caducous; bracts only on the floral bud. Flowers 5-merous; pedicel ca. 0.9 mm long; hypanthium ca. 5.3 mm long, oblong, wrinkled; calyx double, persistent; lacinia triangular; petals ca. 7.5 × 3.9 mm, white, obovate, symmetrical, apex rounded base attenuate, margins not ciliate, glabrous; stamens 10, heteromorphic, smaller anthers ca. 6.5 mm, larger anthers up to 9.6 mm long, lilac, sickle-shaped, curved, apex attenuate, with glands at the ventral part of the anthers base,1 apical pore, connective not prolonged, filament with glandular persistent trichomes; ovary superior, placentation axillary, 3-locular, with glandular trichomes; style ca. 15.1 mm long, straight, with glandular persistent trichomes. Berry 8.7–11.2 × 7.1–7.6 mm, unripe fruit green, ripe fruit orange; seeds numerous, triangular.

Specimens examined:— BRAZIL. Amazonas , Manaus, RDS-Tupé, 16 August 2012, fl., fr., A. L. Corrêa 47 ( EAFM!, HUAM!, INPA!) ; 27 April 2013, fr., A. L. Corrêa 220 ( EAFM!, HUAM!, INPA!) ; 28 April 2013, fl., A. L. Corrêa 222 ( EAFM!, HUAM!, INPA!) .

Distribution and habitat:— Mexico, Belize, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, Colombia, Venezuela, Trinidad and Tobago, Guyana, Suriname, French Guiana, Ecuador, Peru, Bolivia ( Goldenberg et al. 2013) In Brazil it occurs in Amazonian and Atlantic forests and Cerrado ( Goldenberg & Caddah 2015). In the reserve, it occurs on “terra firme” slopes on clay soil with a lot of organic matter.

Comments:— This species is frequent in the reserve. It can be recognized by the rhytidome with papyraceous, brown to gray blades, and stamens with glandular trichomes on their bases.

Figures

FIGURE 2. Flower, fruit and bark in species of Melastomataceae in the RDS-Tupé: Flower (A–B).A: Henriettea martiusii; B: Tibouchina fothergillae. Fruit (C–F); C. H. maroniensis; D. Clidemia epibaterium; E. Miconia comptifolia; F. C. capitellata; G. Bellucia spruceana; H. M. longispicata, detail of inflorescence; I. M. rhytidophylla. Patterns and colors of the rhytidome and inner bark; J. M. chrysophylla; K. M. comptifolia; L. M. crassinervia; M. M. dispar; N. M. egensis; O. M. gratissima; P. M. longispicata; Q. M. lourteigiana; R. M. phanerostila; S. M. radulifolia; T. M. regelii; U. M. tomentosa; V. M. umbrosa; W. Tococa coronata; X. Tococa subciliata.

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).