Species
B. langenbergiana
Photos
2 photos
Identity
- Genus
- Begonia
- Name
- B. langenbergiana
- Author
- Ludovic Jean Charles Kollmann
- Publication Date
- 2018
- Date of Origin
- 2018
- Place
- Sao Paolo
- Habitat
- Begonia langenbergiana is known from the South of Sao Paulo State, Brazil, growing on limestone rock covered by hygrophilous Atlantic Forest. The type locality consists of dense rain forest remnants of approximately 360 km² between 50 and 1000 m elevation in the Parque Estadual Turistico do Alto Ribeiro (PETAR).
- Country
- Brazil
- Region
- America
- Section
- Pritzelia
- Plant Type
- Rhizomatous
- Reference
- Begonia langenbergiana (Begoniaceae) a new species from the south of São Paulo State, Brazil; Phytotaxa 381 (1): 080–085. L. J. C. Kollmann
Plant
- Description
- 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.
- Growth Type
- rhizomatous
- Plant Habit
- Creeping
- Plant Height
- Low <0.5m
- Stem Type
- Rhizome
- Stem Habit
- Few Branched
- Other Features
- Stipules persistent
Lineage
Parents
No parentage recorded.
Descendants
No recorded descendants.
Culture
- Comments
- Begonia langenbergiana is closely related to B. itaguassuensis in its rhizomatous habit, its indumentum of simple trichomes, its reniform, apiculate leaves, its dichotomous inflorescence with persistent bracts and 2 prophylles on pistillate flowers, but can be distinguished by its bullate leaves with adaxially introse and abaxially prominent veins. Furthremore, its first flowers are erect and open when the inflorescence is small and still growing, until his maturity; and the first ramifications of the inflorescences are erect when the inflorescence is growing and until his maturity, and its stigma is without a stigmatic band.
- Known In Cultivation
- Conservation status.—Although part of the range of the new species is in a protected area, due to the apparent endemic distribution of B. langenbergiana, the low number of specimen collected, its approximate Extent of Occurrence estimated to be 16 km2, and the approximate Area of Occupancy estimated at 344 km2, it would seem prudent to include this species on the Endangered (EN) according to the IUCN (2017) criteria (B2ab(i,ii,iii)).
- Endangered Status
- Endangered B2ab(i,ii,iii)
- Original Botanical Description or Link to
- https://doi.org/10.11646/phytotaxa.381.1.10