B. prism a to carp a

(prism-fruited).* Stems small, creeping, hairy; branchlets ascending. l. long, petioled, also hairy, obliquely cordate, ovate, three to five-lobed; lobes pointed, serrated; peduncles axillary, longer than foliage, bearing a small umbel of two to four dipetalous orange and yellow flowers, one female in each umbel. Capsule four-angled, scarcely winged. Summer. Tropical West Africa, 1861. The smallest of cultivated Begonias, and especially interesting because of its four-angled fruit. It forms a pretty cushion of bright shining green foliage, thickly studded with its brightly coloured flowers. Requires a stove temperature and a stony soil. (B. M. 5307.)