Leandra angustifolia de Candolle (1828: 153)

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

2. Leandra angustifolia de Candolle (1828: 153) . Ossaea angustifolia (DC.) Triana (1871: 147) . Pentossaea angustifolia (DC.) Judd (1989: 490) . Lectotype (designated here):— BRAZIL: C. Gaudichaud-Beaupré s.n. (G image!, isolectotype F!). Additional syntypes: BRAZIL: Kunth. (not located). ( Figs. 16 , 17 , 18 , 19 , 20 )

Leandra corcovadensis Raddi (1828: 141) . Type:— BRAZIL. Rio de Janeiro: Rio de Janeiro, Corcovado, G. Raddi s.n. (holotype PI!).

Ossaea angustifolia var. brevifolia Cogn. in Martius et al. (1888: 543). Lectotype (second-setp, designated here):— BRAZIL. Rio de Janeiro: A.F.M. Glaziou 6883 ( BR 5221950 image!, isolectotypes BR 5214815 image!, C image!, K image!, P, R image! (×4), S image!).

TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA

Phytotaxa 262 (1) © 2016 Magnolia Press • 25 Shrubs, 1–3 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, sometimes leaf surface glabrous with the trichomes restricted to the acrodromous veins, trichomes longer on bracts and hypanthium, sometimes glandular trichomes (ca. 1 mm) mixed on the hypanthium. Leaves isophyllous or slightly anisophyllous in each pair (4:9 ratio); petioles (0.3)0.5–2(2.5) cm long; blades (4)6–16(21) × (0.8)1.5–4(5.5) cm, linear, lanceolate or slightly elliptic-lanceolate, apex acuminate, base obtuse or cuneate, margin entire or dentate, ciliate (0.5–1 mm), membranaceous or chartaceous; 3 or seldom 1 acrodromous nerves, plus 0–1 additional pair of faint veins, basally nerved or plinerved, distant 0–25 mm above the base, acrodromous nerves flat, transversal not conspicuous on adaxial surface and acrodromous nerves prominent, transversal flat on abaxial, reticulation slightly conspicuous. Inflorescences axillary, 1–2 per node, 0.5–1.5 cm long, 0(1) pairs of opposite paraclades, accessory branches absent, 1–3(9) flowers per inflorescence, these in glomerules or solitary; bracteoles 2.5–5.5 × 1–2.5 mm, lanceolate, ovate or elliptic, uniformly covered by unbranched trichomes, partially involucral, persistent. Flowers 5–6-merous, sessile. Hypanthium 2.7–3.3 × 1.8–2.2 mm, tubular to slightly urceolate, torus indumentum present or absent, formed by sparse small unbranched glandular trichomes (0.15 mm). Calyx tube ca. 0.4 mm long; inner lobes 0.4–0.7 × 0.5–0.9 mm, deltoid; external teeth 1.5–2.5 mm long. Petals white, 3.2–4 × 0.7–1 mm, linear or lanceolate, apex acuminate, glabrous, spreading at anthesis. Stamens 10–12, opposite to the style; filaments geniculation present, the larger 3.5–5 mm long, the smaller 2.7–4 mm long; anthers white, the larger 2.5–4 mm long, the smaller 2–2.5 mm long, linear-subulate, dorsally curved, pore 0.11–0.14 mm wide, connectives dorsally produced below the anthers 0–0.6 mm, appendage present in the larger anthers, as a basal-dorsal bifurcation in the connective. Ovary 4-celled, 1.5–2 × ca. 1 mm, 60–70 % inferior, apex glabrous or covered by unbranched trichomes (0.4 mm). Style 7–9 mm long, sigmoid, opposite of the stamens, stigma 0.3 mm diam. Berries purple to

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REGINATO black, 4.5–7 × 3.5–5 mm. Seeds 0.7–0.9 × 0.5–0.6 mm, long-obpyramidal, hilum covering 9/10 of the seed length, anticlinal cell walls flat.

TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA

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REGINATO TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA

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Notes:—Among the morphologically similar species, L. angustifolia can be differentiated from L. cogniauxii and L. capitata by the smaller trichomes and bracteoles, and from L. loligomorpha by the shorter external calyx teeth, style position and fruit size (especially the ratio). Since Triana (1871), this species has been treated in the genus Ossaea . Here, the basionym is adopted, following the results of the phylogenetic hypothesis.

Leandra angustifolia has two distinct morphotypes. One with basally nerved leaves and the other with plinerved ones. The second morphotype has leaves with larger length, width and ratios ( Fig. 18 ). It seems that there is a strong correlation between length and width in this species (r = 0.8), and to a lesser extent of leaf length and plinervy (r = 0.68, data not shown). Although the two morphotypes seem to be well differentiated based on statistics ( Fig. 18-A ), there is some overlap in the analyzed characters and they were treated as a single species here. Nonetheless, further morphological and molecular investigations at the populational level are very desirable. Examples of the leaf diversity of this species are given in Fig. 18-D .

Selected specimens examined:— BRAZIL. Bahia: Amargosa, Perdiz 171 ( CEPEC); Arataca, Reginato 1283 ( RB); Barro Preto, Thomas 14302 ( NY); Ibirapitanga, Thomas 13446 ( CEPEC); Ilhéus, Vinha 104 ( RB); Itabuna, Raimundo 1098 ( RB); Porto Seguro, Vinha 104 ( CEPEC); Una, Santos 4106 ( CEPEC); Wenceslau Guimarães, Reginato 1295 ( RB). Espírito Santo: Cachoeiro de Itapemirim, Brade 19950 ( RB); Itaguaçu, Brade 18141 ( NY); Santa Leopoldina, Goldenberg 1436 ( RB); Santa Maria de Jetibá, Fernandes 3291 ( RB); Santa Teresa, Vimercat 157 ( UPCB); São Mateus, Martinelli 2153 ( RB). Minas Gerais: Caratinga, Lopes 688 ( SP); Faria Lemos, Lucas 649 ( UPCB); Juiz de Fora, Menini Neto 414 ( UPCB); Novo Cruzeiro, Stehmann 3546 ( UPCB); Santa Maria do Salto, Lombardi 5880 ( UPCB). Paraná: Guaratuba, Hatschbach 18238 ( NY). Rio de Janeiro: Itatiaia, Santos Filho 78 ( RB); Miguel Pereira, Baumgratz 997 ( CEPEC); Nova Friburgo, Reginato 1119 ( UPCB); Nova Iguaçu, Silva Neto 1633 ( RB); Petrópolis, Goes 76 ( RB); Rio de Janeiro, Vaz 559 ( RB); Santa Maria Madalena, Mautone 444 ( RB); Teresópolis, Velloso 551 ( R). Santa Catarina: Blumenau, Klein 1090 ( M); Itajaí, Klein 718 ( M); Palhoça, Reitz 2523 ( NY). São Paulo: Caraguatatuba, Santos 693 ( UPCB); Queluz, Árbocz 2730 ( SP).

Figures

FIGURE 16. Distribution of Leandra angustifolia. Circles are the basally nerved morphotype, while the triangles are the plinerved.

FIGURE 17. Leandra angustifolia. A. Habit. B. Branch with inflorescence. C. Detail of inflorescences. D. Young fruit.

FIGURE 18. Leandra angustifolia. A. Box plot of leaf length, width, ratio and plinervy. B. Plot of leaf length (x) and width (y). C. Plot of leaf aspect ratio (x) and plinervy (y). D. Examples of leaves, all at the same scale (bar = 2 cm). Triangles correspond to the plinerved type and circles to the basally nerved.

FIGURE 19. Leandra angustifolia. A. Branch with inflorescences. B. Detail of the inflorescence. C. Branch with inflorescences. D. Detail of the inflorescence. E. Branch with inflorescences. F. Detail of leaf on adaxial view. C plinerved morphotype, A and E the basally nerved morphotype. Vouchers: Dusén 1614 (A), Varassin19 (B–C), Filardi 835 (D–E), Goldenberg 910 (F).

FIGURE 20. Leandra angustifolia. A. Flower. B. Flower bud. C. Bracteole. D. Style. E. Petal. F. Hypanthium and calyx longitudinal section. G. Detail of anther base. H. Stamens. I. Anthers. J. Detail of the calyx. K. Detail of the ovary apex. Scales: A–F, H–I = 1 mm; G, J, K = 0.25 mm. Voucher: Thomas 13446.