Leandra lapae Souza & Baumgratz (2005: 419)

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

publication ID	https://doi.org/ 10.11646/phytotaxa.262.1.1
persistent identifier	https://treatment.plazi.org/id/03D48790-FF83-FFE9-11C7-FB2EFE11C6D0
treatment provided by	Felipe
scientific name	Leandra lapae Souza & Baumgratz (2005: 419)
status

Treatment

9. Leandra lapae Souza & Baumgratz (2005: 419) . Type:— BRAZIL. São Paulo: São Paulo, Parelheiros, Jardim Novo Parelheiros , sítio do Sr. José Guilguer Reimberg, à direita na Estrada Eng. Marsilac, após o entroncamento com a Estrada da Colônia , 15 February 1995, S.A.P. Godoy et al. 389 (holotype SP!, isotypes HRCB, SPF!, UEC). ( Figs. 44, 45 View FIGURE 45 , 46 View FIGURE 46 , 47 View FIGURE 47 )

Shrubs, ca. 0.5 m tall. Branches, petioles, leaves, inflorescences, bracts and bracteoles densely covered by unbranched glandular trichomes (1–3 mm) mixed with glandular trichomes (1–2.5 mm), these sparser on the old branches and leaf surfaces, and denser on young branches, petioles, inflorescences and hypanthia. Leaves isophyllous; petioles 1.5–2.5 cm long; blades 4–8.5 × 2.5–5 cm, ovate, apex shortly acuminate, base rounded, margin crenulate, ciliate (0.5–1.5 mm), chartaceous; 5 acrodromous nerves, plus 1 additional pair of faint veins, plinerved, distant 3–8 mm above the base, nerves slightly conspicuous on adaxial surface and acrodromous and transversal nerves prominent on abaxial, reticulation slightly conspicuous. Inflorescences terminal, 1–3 per node, 6.5 cm long, 2 pairs of opposite paraclades, accessory branches absent,> 20 flowers per inflorescence, these in glomerules; bracteoles 3.8–4.4 × 1.5 mm, oblong to elliptic-oblong, uniformly covered by sparse glandular trichomes, involucral, persistent. Flowers 6-merous, sessile. Hypanthium 3.3 × 2.2 mm, campanulate, torus indumentum present, formed by sparse small unbranched glandular trichomes (0.15 mm). Calyx tube 0.2 mm long; inner lobes 0.8 × 0.5 mm, ovate to triangular; external teeth ca. 1.5 mm long. Petals white, 3–4 × 0.9–1 mm, lanceolate, apex acuminate, glabrous, spreading at anthesis. Stamens 12, opposite to the style; filaments geniculation present, the larger ca. 4 mm long, the smaller ca. 3.4 mm long; anthers pink, the larger ca. 3 mm long, the smaller 2.5 mm long, linear-subulate, dorsally curved, pore ca. 0.15 mm wide, connectives dorsally not produced below the anthers, appendage absent. Ovary 4-celled, ca. 2.2 × 1.6 mm, 40 % inferior, apex densely covered by unbranched trichomes (ca. 1 mm). Style ca. 9 mm long, sigmoid, opposite of the stamens, stigma ca. 0.3 mm diam. Fruits and seeds not seen.

TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA

REGINATO TAXONOMIC REVISION OF LEANDRA SECT. LEANDRA

REGINATO

Notes:— Leandra lapae is one of the two species of sect. Leandra with glandular trichomes throughout the plant (the other is L. umbellata ). The two species can be separated by floral differences, with L. lapae possessing smaller flowers and conspicuous unnapendaged anthers. This species is puzzling, because it strongly resembles L. umbellata vegetatively, while the flowers are very similar to those found in L. sericea , from which is differentiated by the indumentum. Whether L. lapae should be recognized as a species as done herein or alternatively included as merely a variant of L. sericea requires greater population sampling to examine the variation. A scenario involving hybridization/introgression should be further evaluated as well.

Specimens examined:— BRAZIL. Rio de Janeiro: Parati, Baumgratz 1050 ( RB, SPF) . São Paulo: São Paulo, Reginato 1468 ( UPCB) .