Bertolonia igrapiuna Bisewski et al. (2020: 564)

Bisewski, Gessica C. A., Bacci, Lucas F., Amorim, André M. & Goldenberg, Renato, 2022, The Genus Bertolonia (Melastomataceae) In The State Of Bahia, Brazil, Phytotaxa 548 (2), pp. 153-183 : 167-169

7. Bertolonia igrapiuna Bisewski et al. (2020: 564) . Figures 9 , 10a .

Herbs 20–30 cm tall, terrestrial or epiphytic. Stem 5–8 mm wide, rounded, densely glandulose-punctate (trichomes less than 0.1 mm long). Leaves opposite; petioles 2.7–15 cm long, quadrangular, moderately to densely glandulosepunctate; blades 8.4–23 × 5.5–16.5 cm, flat, widely ovate or elliptic, base shortly attenuate or narrowly rounded, apex cuspidate or acute, seldom rounded, margins entire or denticulate in the upper half, sparsely ciliate, adaxial surface green, sparsely to moderately glandulose-punctate (trichomes less than 0.1 mm long, brownish), abaxial surface light green, moderately glandulose-punctate (trichomes less than 0.1 mm long, brownish), main veins 5 or 3, plus one pair that do not reach the leaf apex, basal or suprabasal (up to 3–9.8 mm above the base). Inflorescences terminal, 7–19 cm long (15.2–27 cm long in old infructescences), branches moderately glandulose-punctate, sparsely glandulosepunctate when old. Bracts 2–3 mm long, obovate, apex acute, margins ciliate, both surfaces glandulose-punctate; bracteoles 0.8–1.7 mm long, lanceolate, apex acute, both surfaces glandulose-punctate. Hypanthium 2.2–2.9 × 3–3.4 mm, obconic, glandulose-punctate and glandulose-villose. Sepals elliptic to ovate, apex acute, margins entire, ciliate, both surfaces glandulose-punctate. Petals 6.4–8.7 × 3.5–4.7 mm, pink, obovate, base cuneate, apex apiculate, the apiculum ca. 0.5 mm long, with a caducous gland head, margins entire, eciliate, both surfaces papillose, otherwise glabrous. Stamens 4.5–6.5 mm long; filaments 1.7–3.1 mm long; anthers 2.4–3.2 mm long, cream colored, lanceolate, surface slightly undulate, pore rounded, non-thickened margins, extrorse; connective shortly prolonged (ca. 0.2 mm), unappendaged. Style 4.3–6.4 mm long, curved at the apex, glabrous. Fruits 0.5–0.6 × 0.8–1.2 cm. Seeds fusiform.

Examined material: — BRAZIL. Bahia:Arataca, Amorim 4984 ( CEPEC!, NY); Amorim 6089 ( CEPEC!); Amorim 6583 ( CEPEC!, UESC!); Amorim 6667 ( CEPEC!); Amorim 8066 ( CEPEC!, RB!); Jardim, A.B. 13 ( CEPEC!); Jardim, A.B. 24 ( CEPEC!); Jardim, A.B. 25 ( CEPEC!); Jardim, A.B. 146 ( CEPEC!, RB!); Jardim, A.B. 222 ( CEPEC, UESC!, RB!); Jardim, J.G. 4366 ( CEPEC!); Jardim, J.G. 4392 ( CEPEC!); Jardim, J.G. 4820 ( CEPEC!, NY, UPCB!); Thomas 14581 ( CEPEC!, UESC!). Una, Santos, E.B. 4251 ( CEPEC, UEC!, US).

C onservation Status: — Bertolonia igrapiuna has an EOO of 28 km ² and AOO of 16 km ², and should be classified as “Critically Endangered” (CR), following IUCN (2017) categories. This species has been found exclusively in “Parque Nacional Serra das Lontras”.

Notes: — Bertolonia igrapiuna is endemic to Bahia, occurring in montane rainforests ( Fig. 3g ). Collected with flowers from November to March, and fruits from December to June. The species is characterized by the branches, petioles and leaf blades only glandulose-punctate, by the elliptic or ovate leaf blades with shortly attenuate, obtuse or occasionally asymmetric base, and anthers dehiscing through an extrorse pore. It is similar to B. leuzeana (Bonpland 1823: 144) De Candolle (1828: 113) , from the state of Rio de Janeiro. Both have flat, ovate or elliptic leaf blades with non-cordate bases (attenuate or obtuse in B. igrapiuna , acute in B. leuzeana ) and sparse ciliate margins. Bertolonia igrapiuna differs by the leaf blades only glandulose-punctate (vs. the abaxial surface also sparsely glandulose-pilose in B. leuzeana ), petals with apiculate apex ending in a glandular head (vs. petals not apiculate) and anthers dehiscing through an extrorse pore (vs. introrse pore). For more details see Bisewski et al. (2020) and Table 1 .

Figures

FIGURE 3. Distributions of species of Bertolonia in Bahia.A. Bertolonia alternifolia. B. Bertolonia angustipetala. C. Bertolonia bullata. D. Bertolonia carmoi. E. Bertolonia cuspidata. F. Bertolonia hirsutissima. G. Bertolonia igrapiuna. H. Bertolonia kollmannii.

FIGURE 9. Bertolonia igrapiuna. A. Fertile branch. B. Trichomes on the petiole. C. Leaf base, abaxial surface. D. Short-stalked glandular trichomes on the abaxial leaf surface. E. Inflorescence. F. Hypanthium and calyx, abaxial surface. G. Petals apex showing the apiculum with glands (arrow). H. Stamen, lateral (left) and dorsal (right) views, note the extrorse pore on dorsal view. I. Ovary and style. [A, F, H: Jardim, J.G. 4820; B, E, G, I: Amorim 6583; C: Amorim, 6089; D: Jardim, A.B. 24].

FIGURE 10. Specimens in vivo. A. Bertolonia igrapiuna. B. B. linearifolia. C. B. reginatoi. D. B. violacea. E. B. vitoriana. F. Bertolonia sp, belonging to the B. maculata/B. marmorata species complex. Photos:A, C and D by L. F. Bacci; B by F. Michelangeli; E and F by A. M. A. Amorim.