B. langenbergiana

Herbaceous, rhizomatous, 11–32 cm tall, simple trichomes. Stems 0.5–1 cm diam. rooting at the nodes, internodes 0.5–1 cm long, green to reddish, lenticellate. Stipules persistent, 1.5–2.8 × 0.8–2 cm, papiraceous when dry, greenish to reddish, translucent, asymmetrical, triangulate, lenticellate, apex mucronate, margins entire, abaxial face carinate. Petioles 4–22.5 cm long, green to reddish, lenticellate, villose. Lamina 6–11 × 8–15 cm, asymmetrical, reniform, lightly bullate, hispid, apex acuminate, base cordate, overlapping, margins reddish, denticulate to dentate, ciliate, venation actinodromous, 7–8 veined at base, veins adaxially introse, abaxially prominent, hispid. Inflorescences with 2–4 dichotomous cymes, 10–32 cm long, reddish, lenticellate; bracts persistent, 1–2 × 0.5–1 mm, reddish, triangular, apex acute, glabrous. Staminate flowers: pedicels 1–3.5 cm long, white, glabrous; 2-sepals, 9–13 × 4–9.5 mm, white to pinkish, oblong to obovate, apex rounded to obtuse, margins entire; 2-petals, 6.2–10 × 1.5–5 mm, white to pinkish, elliptical to obovate, apex obtuse, margins entire; stamens 11–13, yellow, filaments 0.5–1 mm long, anthers 3.4–3.5 mm long, rimose, connective slightly projecting, apex obtuse. Pistillate flowers: pedicels 0.8–1 cm long, white, glabrous; prophylls 2, 0.8–1.5 × 0.4–0.8 mm, pinkish, triangulate, apex acute; 2-sepals, 3.5–9 × 2.2–3 mm, pinkish, ovate to triangulate, apex acute; 3-petals, 8.5–12 × 4–6 mm, pinkish, elliptical to oblanceolate, sometime falcate, apex obtuse to acute; ovary 3-locular, axile placentation, one placentae per locule, ovules on both sides of placentae; 3-styles, persistent on dry fruit, ca. 3.5 × 2 mm, yellow, united at base, each bifurcate, not spiral, stigmatic papillae covering all the style. Capsules 7–8 × 5–7 mm, basally dehiscent, 3-wings, subequal, white to pinkish, larger one 0.8–1.5 × 0.7–1.3 cm, smaller two 0.7–1.4 × 0.5–0.85 cm. Seeds ca. 0.35 ×0.25 mm, cylindrical, apex rounded. The name of the new species pays a posthumous homage to Kingsley Frederick Langenberg, who made an important contribution to the American Begonia Society (ABS) and has long helped me in the correction of my English papers.

• Classification: Species
• Plant Type: Rhizomatous
• Botanical Section: Pritzelia
• Origin: America, Brazil
• Originator: L.Kollmann
• Date of Origin: 2018