Leandra loligomorpha (R.Goldenb. & Reginato) Reginato, 2016

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

10. Leandra loligomorpha (R.Goldenb. & Reginato) Reginato , comb. nov. ( Figs. 48 , 49 , 50 , 51 )

Basionym: Ossaea loligomorpha Goldenberg & Reginato (2009: 298) . Type:— BRAZIL. Bahia: Itamaraju , Serra de Itamaraju , Morro Pescoço , 11 February 2007, A.M. Amorim et al. 6877 (holotype CEPEC!, isotypes NY!, SPF!, UPCB!) .

Treelets, ca. 3 m tall. Branches, petioles, leaves, inflorescences, bracts and bracteoles covered by appressed, unbranched trichomes (0.5–2 mm), these sparser on the old branches and leaf surfaces. Leaves isophyllous or slightly anisophyllous in each pair (8:10); petioles 0.6–3.2 cm long; blades 4.5–11.5 × 1.5–3.5 cm, elliptic-lanceolate or oblonglanceolate, apex acuminate, base acute to slightly obtuse, margin crenulate, ciliate (0.3–1.5 mm), subchartaceous; 3 acrodromous nerves, plus 1 additional pair of faint veins, plinerved, distant 1–6.5 mm above the base, acrodromous nerves slightly printed, transversal not conspicuous on adaxial surface and acrodromous nerves prominent, transversal flat on abaxial, reticulation slightly conspicuous. Inflorescences axillary, seldom with an additional terminal one, 1–2 per node, 1.5–3 cm long, 0–1 pairs of opposite paraclades, accessory branches absent, 1–5 flowers per inflorescence, these on solitary or on lax or slightly cogested triads; bracteoles 1.4–1.7 × 1 mm, lanceolate, indumented uniformly, non-involucral, persistent. Flowers (4)5(6)-merous, sessile. Hypanthium 4–5 × 1.2–1.6 mm, narrowly tubular, torus

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indumentum present or absent, formed by sparse small unbranched glandular trichomes (ca. 0.5 mm). Calyx tube 0.2–0.3 mm long; inner lobes 0.8–1.2 × ca. 0.5 mm, deltoid to triangular; external teeth (6) 7–10 mm long. Petals color unknown, 3.4–4 × 0.7–0.9 mm, linear to lanceolate, apex acute, glabrous, reflexed at anthesis. Stamens 10, surrounding the style; filaments geniculation present, the larger 2.5–3 mm long, the smaller 2.2–2.8 mm long; anthers white, the larger 3–4.2 mm long, the smaller 3–3.7 mm long, linear-subulate, dorsally curved, pore ca. 0.12 mm wide, connectives dorsally produced below the anthers 0–0.2 mm, appendage absent. Ovary 3-celled, 2–2.4 × 0.5–0.7 mm, 50–70 % inferior, apex sparsely covered by unbranched trichomes (ca. 0.5 mm). Style 8–10 mm long, straight, surrounded by the stamens, stigma ca. 0.2 mm diam. Berries dark purple, ca. 12 × 6 mm. Seeds ca. 0.75 × 0.5 mm, long-obpyramidal, hilum covering 8/10 of the seed length, anticlinal cell walls flat or slightly convex.

Notes:— Leandra loligomorpha is only known from a single locality. It shares similar indumentum and leaves with L. angustifolia , and is distinguished from it by the longer external calyx teeth and the style surrounded by the stamens at anthesis. No other species of sect. Leandra presents the striking long external calyx teeth and the typical elongated fruits found in L. loligomorpha .

Specimens examined:— BRAZIL. Bahia: Itamaraju, Goldenberg 1717 (NY, UPCB).

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Figures

FIGURE 48. Distribution of Leandra loligomorpha.

FIGURE 49. Leandra loligomorpha. A. Branch. C–D. Detail of the flowers. D. Fruit. Photos by F.A. Michelangeli.

FIGURE 50. Leandra loligomorpha. A. Branch with inflorescences. B. Inflorescence. C. Detail of the leaf base. D. Detail of the leaf on adaxial view. E. Detail of the shoot. F. Leaf on abaxial view. Voucher: Amorim 6877.

FIGURE 51. Leandra loligomorpha. A. Flower. B. Hypanthium (up view). C. Detail of anther base. D. Petal. E. Style. F. Hypanthium and ovary cross section. G. Bracteole. H. Hypanthium. I. Stamens. J. Detail of anther apex. K. Detail of the ovary apex. L. Hypanthium and calyx longitudinal section. Scales: A–B, D–E, H, I, L = 1 mm; C, F–G, J–K = 0.25 mm. Voucher: Goldenberg 1717.