Begonia pleiopetala

Proposed conservation assessment Recently assessed as Least Concern (LC) by Tebbitt (2016).

Sumber: The genus Begonia (Begoniaceae) in Peru

Description Acaulescent, tuberous herb, to 25 cm high. Tuber spheroid, 1 – 4 × 1 – 4 cm, with 1 growing point. Stipules persistent, triangular, 2 – 5 × 2 – 4 mm, apex acute, opaque, dark brown, glabrous, margin entire, aciliate. Leaves 2 – 8, alternate, basifixed; petiole 1 – 12.5 cm long, red, sparsely to densely tomentose; blade subsymmetric, reniform to ovate, to 15 × 11 cm, succulent, apex indistinct, rounded, to obtuse, base truncate to cordate, basal lobes overlapping or not overlapping, sinus to 25 mm deep, margin undulate, crenate, or dentate, aciliate to ciliate, upper surface green, glabrous to pilose or villous, lower surface very pale green with red veins, glabrous to sparsely pilose on the lamina, sparsely to densely pilose or villous on the veins, veins palmate, 5 – 8 veined from the base. Inflorescences 1 – 4, bisexual, axillary, erect, a dichasial or monochasial cyme, with 2 branches, bearing up to 2 staminate flowers and 2 pistillate flowers, protandrous; peduncle to 21 cm long, white to green or red, sparsely tomentose, bracts late deciduous, lanceolate, 4 – 10 × 1 – 5 mm, translucent, pale green, glabrous, sparsely tomentose on the outside, apex acute, margin entire, sometimes serrulate at the apex, aciliate to ciliate. Staminate flowers: pedicels to 45 mm long, sparsely tomentose; tepals 5 – 11, projecting, lanceolate, 5 – 25 × 1 – 13 mm, apex rounded, white to pink, rarely red, glabrous, sometimes lanate on the outside, margin entire, aciliate; stamens 15 – 50, spreading, yellow, filaments 0.5 – 2.5 mm long, free, anthers ellipsoid, 1 – 1.5 × 0.5 – 0.8 mm, dehiscing via lateral slits, connectives not extending or extending to 0.75 mm, symmetrically basifixed. Pistillate flowers: pedicels to 55 mm long; bracteoles lacking; tepals (4 –) 5 – 10, subequal, persistent in fruit, spreading, elliptic to ovate, 4 – 10 × 1 – 10 mm, apex rounded to truncate, white to pink, rarely red, glabrous, sparsely tomentose outside, margin entire, aciliate; ovary body ovoid, 2 – 8 × 2 – 7 mm, white to green or red, sparsely to densely tomentose, unequally 3 - winged, rarely 2 - winged, the largest wing triangular to rectangular, sometimes ascending, 2 – 8 × 2 – 10 mm, the smallest marginal, 0.5 – 1 mm wide; 3 - locular, rarely 2 - locular, placentae branches divided, bearing ovules on both surfaces; styles 3, rarely 2, yellow, free, 2 – 4 mm long, 2 - to 4 - lobed, stigmatic papillae in a spirally-twisted band. Fruiting pedicel to 55 mm long. Fruit body ovoid, to 9 × 8 mm, drying brown, wings same shape as in ovary, the largest expanding to 9 × 14 mm, the smallest expanding to 1.5 mm wide.

Sumber: The genus Begonia (Begoniaceae) in Peru

Figs 3 B, 4 C, 6 F, 7 G, 52 C, 55

Sumber: The genus Begonia (Begoniaceae) in Peru

Distribution and ecology Known from Peru and Bolivia. Within Peru, known from La Libertad, Ancash, Huánuco, Pasco, Junín, Huancavelica, Cuzco, Apurimac, and Puno Regions (Fig. 52 C). Found in lower, middle, and upper montane forest and high elevation grasslands at an elevation of 946 – 3950 m a. s. l. In the lower parts of its elevational range, B. pleiopetala is typically found on cliff faces and at higher elevations it is found among rocks and growing on grassy slopes. The species is a geophyte and dies down to its tuber in the dry season. The species flowers in the wet season, which is mostly from December to March.

Sumber: The genus Begonia (Begoniaceae) in Peru

Andibus, J. McLean s. n. (holotype K [K 000252037]). L. B. Smith & B. G. Schubert, Revista Univ. (Cuzco) 33 (87): 83 (1944); R. C. Foster, Contr. Gray Herb. 184: 138 (1958); D. C. Wasshausen et al. in P. M. JØrgensen et al. (eds), Cat. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. 129: 386 (2013); M. C. Tebbitt, Novon 23 (4): 484 (2015). Begonia pusilla A. DC., Ann. Sci. Nat. Bot. IV (11): 120 (1859). – Type: Bolivia, [La Paz Department], Prov. Yungas, xii 1846, H. A. Weddell 4215 (lectotype G-DC ex P [photograph F # 7327] designated in: Revista Univ. (Cuzco) 33 (87): 78 (1944) by Smith, L. B. & Schubert, B. G.; isolectotype P [P 00482207, photograph F # 38530]).

Sumber: AN UPDATED CHECKLIST AND KEY TO THE SPECIES OF BOLIVIAN BEGONIA, INCLUDING ONE NEW SPECIES

Distribution. Peru and Bolivia. Nomenclatural notes. Tebbitt (2015 c) attempted to lectotypify Begonia pusilla A. DC. with the specimen H. A. Weddell 4215 (G-DC ex P). Smith & Schubert (1944 a) had, however, already effected this lectotypification by citing the same specimen as the type. The earlier typification should be followed (see Article 9.19 of the Shenzhen Code; Turland et al., 2018). The same is true of Begonia warburgiana Hieron. (Hieronymus, 1895), which Tebbitt attempted to lectotypify based on A. Stübel 24 b (B [B 100186583]) but cited the same sheet and barcode as the isolectotype. This lectotypification was also effected by Smith & Schubert (1944 a). We note that Tebbitt (2015 c) cited the type of Begonia gracillima A. DC. as a Bolivian collection. This specimen was collected by C. Gay, who collected only in Peru and Chile. It was collected in Peru, as indicated by the label, which clearly states ‘ Pérou’. This name has not been applied in Bolivia, so we exclude it from this treatment. Identification notes. See the Identification notes for Begonia marinae.

Sumber: AN UPDATED CHECKLIST AND KEY TO THE SPECIES OF BOLIVIAN BEGONIA, INCLUDING ONE NEW SPECIES