Taxonomic revision of Leandra sect. Leandra (Melastomataceae, Miconieae) Author Reginato, Marcelo text Phytotaxa 2016 2016-05-25 262 1 448 450 http://dx.doi.org/10.11646/phytotaxa.262.1.1 journal article 10.11646/phytotaxa.262.1.1 1179-3163 13667415 4. Leandra capilliflora (Naudin) Reginato , comb. nov. ( Figs. 24 , 25 , 26 , 27 ) Basionym: Staphidiastrum capilliflorum Naudin (1852: 331) . Sagraea capilliflora (Naudin) Triana (1871: 138) . Clidemia capilliflora (Naudin) Cogn. in Martius et al. (1886: 508). Lectotype (designated here):— BRAZIL . Rio de Janeiro : H. Lalande s.n. (P 506237 image!, isolectotype P 506236 image!). Additional syntype : BRAZIL : C. Gaudichaud-Beaupré 720 (G image!). Shrubs, 1 m tall. Branches, petioles, leaves, inflorescences, bracts and bracteoles apparently glabrous, hypanthia apparently glabrous or sparsely covered by glandular trichomes (ca. 0.8–1.5 mm ). Leaves isophyllous or slightly anisophyllous in each pair (up to 3:6 ratio); petioles 0.2–1 cm long; blades 3–8(10) × 1–3.5(5) cm, lanceolate or obovate, apex acuminate or caudate, base cuneate, margin entire, ciliate ( 0.2–0.5 mm ), membranaceous; 3 acrodromous nerves, plus 0–1 additional pair of faint veins, basally nerved, seldom slightly plinerved, distant up to 4 mm above the base, acrodromous nerves slightly printed, transversal not conspicuous on adaxial surface and acrodromous and transversal nerves prominent on abaxial, reticulation slightly conspicuous. Inflorescences axillary, seldom with an additional terminal one, 1–2 per node, 1.5–3 cm long, opposite paraclades absent, accessory branches absent, 3 flowers per inflorescence, these on dichasia; bracteoles 0.4–0.6 × 0.2–0.3 mm , subulate, glabrous, non-involucral, persistent. Flowers 4-merous, sessile or on pedicels up to 0.2 mm long. Hypanthium 2–3 × 1–2 mm , tubular or urceolate, torus indumentum absent. Calyx tube ca. 0.4 mm long; inner lobes 0.5–1 × ca. 0.7 mm , deltoid; external teeth 1–2.5 mm long. Petals white, 2–2.6 × 0.7–1 mm , oblong, apex rounded or slightly truncate, glabrous, reflexed at anthesis. Stamens 8, surrounding the style; filaments geniculation present, the larger 2–2.5 mm long, the smaller 1.5–2 mm long; anthers white, the larger 2.8–3 mm long, the smaller 2–2.2 mm long, linear-subulate, straight or ventrally curved, pore ca. 0.10 mm wide, connectives dorsally produced below the anthers 0–0.4 mm , appendage present in the larger anthers, as a basal-dorsal bifurcation in the connective. Ovary 3-celled, 1.5–2 × 1–1.5 mm , 90 % inferior, apex densely covered by glandular trichomes ( 0.5–0.8 mm ). Style 5–7 mm long, straight, surrounded by the stamens, stigma 0.15 mm diam. Berries blue or purple, 6–9 × 4–6 mm . Seeds 0.6–0.7 × 0.3–0.4 mm , long-obpyramidal, hilum covering 85/100 of the seed length, anticlinal cell walls slightly convex. TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA Phytotaxa 262 (1) © 2016 Magnolia Press • 33 FIGURE 24. Distribution of Leandra capilliflora . FIGURE 25. Leandra capilliflora . A. Habit. B. Branch with inflorescence. C. Detail of the inflorescences. D. Flower. 34 • Phytotaxa 262 (1) © 2016 Magnolia Press REGINATO TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA FIGURE 26. Leandra capilliflora . A. Leaf on abaxial view. B. Branch with inflorescences. C. Detail of the shoot. D. Detail of the frutescence. E. Detail of leaf base on abaxial view. F. Detail of leaf on adaxial view. Voucher: Reginato 1206 . Phytotaxa 262 (1) © 2016 Magnolia Press • 35 36 • Phytotaxa 262 (1) © 2016 Magnolia Press FIGURE 27. Leandra capilliflora . A. Detail of the calyx external teeth. B. Bracteole. C–D. Flower. E. Flower bud. F. Style. G. Anther base. H. Anther apex. I. Detail of ovary apex. J. Hypanthium and ovary cross section. K. Stamens. L. Anthers. M. Hypanthium and calyx longitudinal section. N. Petal. Scales: C, M, N = 1 mm; A, B, D–L = 0.25 mm. Voucher: Reginato 1294 . REGINATO Notes :— Leandra capilliflora can be identified by a set of characters that are not found in any other species of sect. Leandra . Among the most conspicuous are the apparently glabrous leaves, lax and long pedunculate axillary inflorescences, and flowers predominantly 4-merous with rounded or truncate petal apices. Overall, this species seems to be morphologically similar to species of Leandra s.str. outside sect. Leandra , like Ossaea suprabasalis R.Goldenb. & Reginato , O. coriacea (Naudin) Triana , O. cinnamomifolia (Naudin) Triana and L. euphorbioides (Naudin) D'El Rei Souza & Baumgratz , from which is differentiated by the rounded or truncate petal apex and/or the basally nerved or slightly plinerved leaves. Nonetheless, the phylogenetic hypothesis for the group (see Results) is followed here, and this species is treated in sect. Leandra under a proposed new combination. Specimens examined :— BRAZIL . Bahia : Arataca, Amorim 5017 (UPCB), Goldenberg 875 (UPCB); Belmonte, Silva 372 (NY); Itacaré, Mori 12011 (CEPEC, NY, RB); Una, Brito 4239 (UPCB), Santos 4043 (UPCB); Uruçuca, Fiaschi 2383 (CEPEC, NY); Wenceslau Guimarães, Amorim 5066 (CEPEC, NY, UPCB), Reginato 1294 (RB), Thomas 9379 (CEPEC, NY). Espírito Santo : Cachoeiro de Itapemirim, Brade 19366 (NY, RB), Brade 19743 (NY, RB); Cariacica, Fontana 5163 (NY, RB, UPCB), Forzza 5025 (UPCB), Goldenberg 1095 (UPCB); Ibiraçu, Fontana 2792 (UPCB); Santa Teresa, Goldenberg 1531 (NY, UPCB), Goldenberg 895 (UPCB), Reginato 1206 (NY, UPCB). Rio de Janeiro : Santa Maria Madalena, Heiden 753 (CEPEC, NY, RB).