Synopsis of the genus Drosera (Droseraceae) in Angola and the Democratic Republic of the Congo Author Rjosk, A. epartment of Biology, Institute of Botany, Faculty of Science, Technische Universität Dresden, 01062 Dresden, Germany annabell.rjosk@tu-dresden.de Author Neinhuis, C. epartment of Biology, Institute of Botany, Faculty of Science, Technische Universität Dresden, 01062 Dresden, Germany Author Monizi, M. University of Kimpa Vita, Province of Uíge, Rua Henrique Freitas No. 1, Bairro Popular, Uíge, Angola Author Lautenschläger, T. epartment of Biology, Institute of Botany, Faculty of Science, Technische Universität Dresden, 01062 Dresden, Germany text Blumea - Biodiversity, Evolution and Biogeography of Plants 2022 2022-06-30 67 1 1 14 http://dx.doi.org/10.3767/blumea.2022.67.01.03 journal article 10.3767/blumea.2022.67.01.03 7679465 1. Drosera affinis Welw. ex Oliv. — Fig. 3 Drosera affinis Welw. ex Oliv. (1871) 402; Diels (1906) 88; J.R. Laundon (1959) 4; (1970) 27; (1978) 66; A.S.Rob. et al. (2017) 1318. — Type : F.M.J. Welwitsch 1183 (holo LISU), Angola ,Distr. Huilla,Lopolo, Jan.1860 . Perennial herb, caulescent. Stems mostly short, up to 10 cm high ( Fig. 3b ). Leaves up to 9 cm long (petiole and lamina), alternate to spirally arranged, clustered, densely arranged, mostly erect, old leaves reflexed; stipules 0.3–1 cm long, ferrugineous, apex lacerated; lamina narrowly spathulate or obovate, 1.5–3 by 0.2–0.5 cm , apex obtuse, gradually narrowing from the apex downwards, bearing tentacles adaxially and around the mar- gins, glabrous or sparsely pilose abaxially ( Fig. 3a ); petiole 3–7 cm long (2–5 times as long as lamina), slender, glabrous or sparsely pilose. Inflorescences cymose, with 3–13 flowers; peduncles 1–3 together; 8–35 cm long, arising laterally from the stem, slightly curved at the base or erect, glabrous, canaliculate; bracts linear to elliptic, 3–5 mm long, caducous; pedi- cels 2–10 mm long, glabrous or sparsely pilose (sometimes glandular). Sepals 5, oblong to lanceolate, 3–7 by 1.5–2 mm , connate at the base, sparsely pilose. Petals 5, elliptic to ob- ovate, 5–8 mm long, apex obtuse, pale pink to purple. Stamens 5, filaments c. 5 mm long and pink. Pollen in tetrads, yellow, tetrads c. 35–55 µm diam, single grains c. 23–30 µm diam, echinate ( Fig. 3e ), echini ± conical, c. 2 µm long, medium density of echini, short gemmate to clavate sculptural elements between echini. Pistil : ovary subglobose, glabrous; styles 3, c. 2.5 mm long, 2-partite to the base, arms filiform. Seeds fusiform, 0.7–0.9 by c. 0.2 mm , testa reticulate. Distribution — Angola , Congo , DRC , Malawi , Mozambique , Namibia , Tanzania , Zambia , Zimbabwe ( Fig. 3c ). Fig. 3 Drosera affinis Welw. ex Oliv. a. Leaf shape showing the very long and slender, glabrous petiole and the narrowly obovate lamina; b. general morphology: short caulescent, spiral leaves and laterally arising, glabrous inflorescences; c. distribution (grey) according to the literature; d. province map of Angola and DRC with localities of examined herbarium specimens; e. pollen in tetrads with echinate, conical sculpture elements in medium density. — Scale bars: a = 1 cm; b = 2 cm; e = 10 µm. Habitat & Ecology — Wet meadows, swamps, perennially wet places in seasonally dry wet-savannahs. Additional specimens (see Fig.3d for province map). ANGOLA , Bié , Camacupa, Cuemba, quedas, alt. 1200 m , 6 Oct. 1965 , Teixeira & Matos 8995 ( BR ) ; Huíla , Huíla, Oct. 1898 , E. Dekindt 466 ( BR ) ; Na margem di rio Nene, a montante da ponte, junto da Estrada de Huíla para Jau, 17 Dec. 1955 , E.J. Mendes 1144 ( COI ) ; Sà da Bandeira, na subida para o miradouro da Tundavale, nos lugares enchrcados, 13 Oct. 1969 , F. Murta & M. Silva 799 ( COI ) ; Lunda Sul , Dala,margem do rio Chiumbe,1927, Carrisso & Mendon ҫa 564 ( COI ) ; Dala, rio Chiumbe, lugares húmidos, alt. 1200 m , 23 Apr. 1937 , A.W. Exell & F.A. Mendon ҫa 1087 ( COI ) ; Moxico , quedas de Dala, 17 Aug. 1965 , R. Mendes dos Santos 1658 ( COI ) . – DRC , Haut-Katanga , Kaziba, Terr. Manono, Parc national de le Upemba, alt. 1500 m , 16 Feb. 1948 , G.F. de Witte 3383 ( BR ) .