Leandra capitata Reginato, 2016

Reginato, Marcelo, 2016, Taxonomic revision of Leandra sect. Leandra (Melastomataceae, Miconieae), Phytotaxa 262 (1), pp. 448-450 : 448-450

5. Leandra capitata Reginato , nom. nov. ( Figs. 28 , 29 , 30 , 31 )

Basionym: Ossaea consimilis Souza (2002: 11) . Ossaea capitata Vinha (1973: 322) , nom. illeg. Type:— BRAZIL. Bahia:

Eunápolis, Itabela, 3 July 1970, T.S. Santos 874 (holotype CEPEC!, isotype US!). Non Leandra consimilis Gleason .

TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA

Phytotaxa 262 (1) © 2016 Magnolia Press • 37 Shrubs, 2 m tall. Branches, petioles, leaves, inflorescences, bracts and bracteoles covered by unbranched trichomes (1–3(4) mm), these very sparse on the old branches and leaf surfaces, and denser on petioles and hypanthia. Leaves slightly anisophyllous in each pair (8:10 ratio); petioles 0.6–1 cm long; blades 6–11 × 2–3 cm, lanceolate, apex acuminate to caudate, base obtuse, margin entire, ciliate (2 mm), subchartaceous; 3 acrodromous nerves, plus 1 additional pair of faint veins, basally nerved, acrodromous nerves slightly conspicuous on adaxial surface and acrodromous and transversal nerves slightly prominent on abaxial, reticulation slightly conspicuous. Inflorescences axillary, 2 per node, 1 cm long, opposite paraclades absent, accessory branches absent, 3 flowers per inflorescence, these in glomerules; bracteoles 7–9 × 2–3 mm, oblong, uniformly covered by unbranched trichomes, involucral, persistent. Flowers 6-merous, sessile. Hypanthium 4.5 × 2.5 mm, tubular, torus indumentum absent. Calyx tube 0.3 mm long; inner lobes 0.9–1.1 × ca. 0.5 mm, lanceolate; external teeth 3.5 mm long. Petals white, 4.8–5.2 × ca. 0.7 mm, linear, apex acuminate, glabrous, spreading at anthesis. Stamens 12, opposite to the style; filaments geniculation present, the larger 5 mm long, the smaller 4.5 mm long; anthers pink, the larger 3.7 mm long, the smaller 3 mm long, linear-subulate, straight, pore ca. 0.15 mm wide, connectives dorsally not produced below the anthers, appendage absent. Ovary 4-celled, 2.5 × 1.2 mm, 40–50 % inferior, apex sparsely covered by unbranched trichomes (0.5 mm). Style 10 mm long, sigmoid, opposite of the stamens, stigma 0.25 mm diam. Fruits and seeds not seen.

Notes:—Among the morphologically similar species, Leandra capitata can be differentiated from L. angustifolia by the longer trichomes and bracteoles, and from L. cogniauxii by the lanceolate leaves. There are few collections of this species and it does not seem to be sympatric with any morphologically close relative with which it might be confused. A new name for this species is proposed, since the epithet consimilis is already taken in Leandra . The epithet used by the author of the first name proposed for this taxa was chosen to designate the new name. Ossaea capitata Vinha was a posterior homonym of Ossaea capitata Urb.

38 • Phytotaxa 262 (1) © 2016 Magnolia Press

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Specimens examined:— BRAZIL. Bahia: Eunápolis, Mello-Filho 2986 (CEPEC, R), Santos 874 (CEPEC);

Jequié, Reginato 1303 (NY, RB). Espírito Santo: Governador Lindenberg, Goldenberg 2164 (UPCB).

TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA

Phytotaxa 262 (1) © 2016 Magnolia Press • 39 40 • Phytotaxa 262 (1) © 2016 Magnolia Press

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Figures

FIGURE 28. Distribution of Leandra capitata.

FIGURE 29. Leandra capitata. A. Habit. B. Branch with inflorescence. C. Detail of the inflorescences. D. Old flowers.

FIGURE 30. Leandra capitata. A. Detail of the leaf on adaxial view. B. Branch with inflorescences. C. Detail of the shoot. D. Leaf on abaxial view. E. Detail of the leaf base. F. Inflorescence. Voucher: Mello-Filho 2986.

FIGURE 31. Leandra capitata. A. Flower. B. Flower bud. C. Bracteole. D. Style. E. Detail of the ovary apex. F. Detail of the anther apex. G. Hypanthium and calyx longitudinal section. H. Stamens. I. Petal. J. Anthers. Scales: A–D, G–J = 1mm; E–F = 0.25 mm. Voucher: Mello-Filho 2986.