Miconia phanerostila Pilger (1905: 173)

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 : 120

29. Miconia phanerostila Pilger (1905: 173) . ( Figure 2 R , 3 R .)

Trees 4.80–6 m tall. Whitish brown and scaly rhytidome. Branches erect, quadrangular, not winged, rufous; branches, petioles, leaves abaxial surface, inflorescences, bracts, bracteoles, hypanthium and fruits with dendritic persistent trichomes. Leaves opposite, isophyllous; petioles slightly channelled 4.2–4.7 mm long; leaf blades 27–32 × 10.9–14.2 cm, chartaceous, discolored, symmetrical, oblong-elliptic or obovate, base attenuate, apex acuminate, margins entire, not ciliate, adaxial side glabrous, leaf veins 5, suprabasal; ant domatia absent. Paniculate 13.3–18.1 × 14.6–16.7 cm, terminal; bracts ca. 1.1 mm long, triangular, caducous; bracteoles ca. 0.7 mm long. Flowers 5-merous; pedicel ca. 0.2 mm long; hypanthium ca. 2.6 mm long, campanulate, striate; lacinia triangular, with dendritic trichomes; calyx double, persistent; petals ca. 2.8– 1.8 mm, white, obovate, symmetrical, apex rounded, base attenuate, margins not ciliate, glabrous; stamens 10, heteromorphic, smaller anthers ca. 2.3 mm, larger anthers ca. 2.8 mm long, white, oblong, straight, apex truncate,1 apical pore, connective not prolonged, smaller filaments ca. 2.7 mm long, larger filaments ca. 3.1 mm long, glabrous; ovary ca. 1.2 mm long, half-inferior, placentation axillary, 3-locular, with glandular trichomes; style ca. 5.9 mm long, straight, with dendritic caducous trichomes. Berry ca. 4.6 × 5.9 mm, unripe fruit green, ripe fruit purple; seeds numerous, triangular.

Specimens examined:— BRAZIL. Amazonas, Manaus, RDS-Tupé, 24 October 2003, fr., Herb 96 (HUAM!).

Additional specimens examined:— BRAZIL. Amazonas , Manaus, 29 July 1984, fl., S. Renner 982 ( INPA!) ; 11 October 1984, fl., S. Renner 1004 ( INPA!) .

Distribution and habitat:— Colombia, Peru, Bolivia ( Goldenberg et al. 2013). In Brazil it occurs in Amazonian forests ( Goldenberg & Caddah 2015). In the reserve, it occurs on “terra firme” plateaus, in places with plenty sunlight, on well drained, clay soil.

Comments:— This species is not frequent in the reserve. It can be recognized by the whitish brown and scaly rhytidome, leaves with suprabasal veins and style with dendritic trichomes.

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).