Miconia regelii Cogniaux (1888: 405)

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 : 121-122

33. Miconia regelii Cogniaux (1888: 405) . ( Figure 2 T .)

Shrubs ca. 1.60 m tall. Light gray and smooth rhytidome. Branches erect, cylindrical, not winged, rufous; branches, petioles, leaves abaxial surface, inflorescences, bracts, bracteoles, hypanthium and fruits with stellate-stipitate persistent trichomes. Leaves opposite, isophyllous; petioles slightly channelled 0.7–1.4 cm long; leaf blades 11.6–15.6 × 4.8–5.2 cm, chartaceous, discolored, symmetrical, elliptical, base cuneate, apex acuminate, margins entire, not ciliate, adaxial side glabrous, leaf veins 5, basal; ant domatia absent. Paniculate 6.9 × 3.8–4.2 cm ,, terminal; bracts ca. 0.9 mm long, linear, persistent; bracteoles ca. 0.3 mm long. Flowers 5-merous; pedicel 0.5–0.7 mm long; hypanthium ca. 1.2 mm long, campanulate, wrinkled; petals ca. 1.4 × 0.9 mm, white, obovate, symmetrical, apex rounded, base attenuate, margins not ciliate, glabrous; stamens 10, heteromorphic, smaller anthers ca. 0.8 mm, larger anthers ca. 1 mm long, white, oblong, straight, apex truncate, 1 apical pore, connective prolonged ca. 0.3 mm long, smaller filaments ca. 1.1 mm, larger filaments ca. 1.8 mm long, glabrous; ovary 0.8 mm long, half-inferior, placentation axillary, 3-locular, with trichomes; style 2.4–3.1 mm long, straight, glabrous. Berry 2.2–2.5 × 2.7–3 mm, unripe fruit green, ripe fruit blackish; seeds numerous, triangular.

Specimens examined: — BRAZIL. Amazonas , Manaus, RDS-Tupé, 25 October 2012, fr., A. L. Corrêa 82 ( EAFM!, HUAM!, INPA!) ; 25 October 2012, bot., A. L. Corrêa 86 ( EAFM!, HUAM!, INPA!) .

Additional specimens examined: — BRAZIL. Pará , Almerim, 13 December 1978, fl., M. R. Santos 534 ( INPA!) ; 15 October 1986, fl., M. J. Pires et al. 1428 ( INPA!) .

Distribution and habitat: —In Guyana ( Goldenberg et al. 2013). In Brazil it occurs in Amazonian forests ( Goldenberg & Caddah 2015). In the reserve, it occurs on “terra firme” slopes on clay soil with low organic matter.

Comments: —This species is not frequent in the reserve. It can be recognized by the light gray and smooth rhytidome, leaves lacking ant domatia and with stellate-stipitate trichomes, and paniculate terminal inflorescences.

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.