Aciotis circaeifolia ( Bonpland 1818: 101 ) Triana (1871: 52)

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 : 106

2. Aciotis circaeifolia ( Bonpland 1818: 101) Triana (1871: 52) . ( Figure 3M .)

Herbs 60–90 cm tall. Green smooth rhytidome. Branches erect, quadrangular, not winged, greenish, hollow; branche, leave, petiole, inflorescence, bracts, bracteoles, hypanthium and fruit with glandular persistent trichomes. Leaves opposite isophyllous; petiole channelled 9.4–14.2 mm long; leaf blades 6.8–9.4 × 2.3–4.4 cm, membranous, concolorous, symmetrical, lanceolate, base cordate, apex acuminate, margins serrate and ciliate, leaf veins 8, basal; ant domatia absent. Inflorescence a thyrse 8.6–17.8 × 4.6–5.6 cm, terminal; bracts 0.5–0.9 mm long, persistent; bracteoles 0.2–0.3 mm long, persistent. Flowers 4-merous, sessile; hypanthium ca. 3.5 mm long, campanulate, smooth; calyx simple, persistent; petals 8.1–8.4 × 3–6.6 mm, white, oblong, symmetrical, apex acuminate, base cuneate, margins not ciliate, glabrous; stamens 8, isomorphic, anthers 0.8–1.2 mm long, white, oblong, straight, apex acute, 1 apical pore, connective not prolonged, filament 2.2–2.9 mm long, glabrous; ovary ca. 2 mm long, half-inferior, placentation axillary, 2-locular, glabrous; style ca. 6.5 mm long, straight, glabrous. Capsule 4.3–4.5 × 3.1–3.3 mm, unripe fruit green, ripe fruit blackish; seeds numerous, ovoid.

Specimens examined: — BRAZIL. Amazonas , Manaus, RDS-Tupé, 05 June 2012,fl., A. L. Corrêa 14 ( EAFM!, HUAM!, INPA!) ; 09 June 2012, fl, A. L. Corrêa 21 ( EAFM!, HUAM!, INPA!) ; 27 July 2012, fl, A. L. Corrêa 26 ( EAFM!, HUAM!, INPA!) ; 16 August 2012, fl.,fr., A. L. Corrêa 56 ( INPA!) ; 05 December 2012, fl., A. L. Corrêa 108 ( EAFM!, HUAM!, INPA!) ; 06 December 2012, A. L. Corrêa 115 ( EAFM!, HUAM!, INPA!) ; 30 January. 2012, fl., A. L. Corrêa 133 ( EAFM!, HUAM!, INPA!) ; 02 March 2012, fl., A. L. Corrêa 189 ( EAFM!, HUAM!, INPA!) .

Distribution and habitat: — Colombia, Guyana ( Freire-Fierro, 2002). In Brazil it occurs in Amazonian forests ( Rosa & Baumgratz, 2015). In the reserve it occurs in altered environments and trail edges.

Comments: —This species is frequently found in the reserve. It can be recognized by the greenish quadrangular branches and cordate leaf base.

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).