Tibouchina fothergillae (Schrank & Martius ex De Candolle 1828: 108 ) Cogniaux (1885:320)

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 : 124

38. Tibouchina fothergillae (Schrank & Martius ex De Candolle 1828: 108) Cogniaux (1885:320) . ( Figure 2 B ; 3 J .)

Shrubs ca. 1.60 m tall. Smooth brown rhytidome. Branches erect, quadrangular, not winged, whitish; woolly, branches, petioles, leaves both side, inflorescence, bracts, hypanthium and fruits with simple persistent trichomes. Leaves isophyllous; petioles slightly channelled 3.9–5.4 mm long; leaf blades 6.1–7.3 × 2.1–2.6 cm, chartaceous, concolorous, symmetrical, lanceolate, base rounded, apex acute, margins entire and ciliate, leaf veins 5, basal; ant domatia absent. Paniculate 8.6–15.1 × 10.2–12.6 cm, terminal; bracts ca. 14.9 mm long, ovate, covering all floral bud, caducous, with simple persistent trichomes; bracteles absent. Flowers 5-merous; pedicel ca. 2.4 mm long; hypanthium ca. 8.4 mm long, oblong, wrinkled, with simple persistent trichomes; calyx simple, persistent; lacinia triangular ca. 6.6 mm long, with simple trichomes; petals ca. 28.7 × 24.9 mm, purplish, obovate, symmetrical, base attenuate, margins ciliate, glabrous; stamens 10, heteromorphic, smaller anthers ca. 5.7 mm long, larger anthers 7.1 mm long, sickle-shaped, curved, apex attenuate,1 apical pore, connective prolonged, smaller ca. 1.6 mm long, larger ca. 1.9 mm long, with ventral appendage, smaller filaments ca. 9 mm long, larger filaments ca. 9.9 mm long, with simple persistent trichomes; ovary ca. 6.8 mm long, inferior, with simple trichomes; style ca. 13.5 mm long, curved, with glandular persistent trichomes. Capsule ca. 9.8 × 7.3 mm, unripe fruit green, ripe fruit purple; seeds numerous, cochleate.

Specimen examined:— BRAZIL.Amazonas, Manaus, RDS-Tupé. 28 April 2013, fl.,fr., A.L. Corrêa 218 (EAFM!, HUAM!, INPA!).

Distribution and habitat:— Endemic to Brazil in the Atlantic forest ( Guimarães, 2015). In the reserve, it is cultivated in the backyards as an ornamental plant.

Comments:— The genus can be identified by the cochleate seeds. Among the species of Tibouchina that occur in the reserve, it can be recognized by the lanceolate leaf blade.

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).