Drosera elongata Exell & J.R.Laundon (1955b) 42; J.R. Laundon (1970) 29; A.S.Rob. et al. (2017) 1384. —

Type: A.W. Exell & F.A. Mendon ҫa 1268 (holo BM), Angola, Lunda Sul, Luma-Cassai, ‘Tenga’, 27 Apr. 1937.

Slender, scrambling, caulescent herb. Stems up to 90 cm long, c. 1 mm diam, flexuous, pilose to densely pilose (Fig. 6b). Leaves evenly spaced along the stem, alternate to spirally arranged, semi-erect, older leaves perpendicular to stem or slightly reflexed; stipules 2–5 mm long, membranous, deeply lacer- ated apically, ferrugineous; lamina obovate to elliptic, 3–6 by 2–4 mm, bearing tentacles adaxially and around the margins, pilose abaxially (Fig. 6a); petiole 0.7–1.5 cm long, slender, pilose. Inflorescences cymose, with 2–9 flowers; peduncles 1 or 2 together, 9–25 cm long, arising laterally, ascending, pilose to glandular-pilose; bracts linear to oblanceolate, 2–3 mm long, pilose or glandular-pilose; pedicels 1–6 mm long, pilose to glandular-pilose. Sepals 5, lanceolate to elliptic, 3–5 by 1–2 mm, connate at the base, apex obtuse or acute, glan- dular-pilose. Petals 5, obovate, 4–6 by 2–3 mm, obtuse, pink. Stamens 5, filaments 2–4 mm long. Pollen in tetrads, tetrads c. 45–50 µm diam, single grains c. 30 µm diam, echinate (Fig. 6e), echini conical, c. 2 mm long, sometimes constricted in the middle, in low to medium density, with short gemmate to clavate sculptural elements between echini. Pistil: ovary c. 1 by 1.5 mm, glabrous; styles 3, 2-partite at the base. Seeds fusiform, 0.5–0.8 by c. 0.2 mm, black, testa smooth (Fig. 6f).

Distribution — Angola, Burundi, Congo, DRC, Tanzania, Zambia (Fig. 6c).

Habitat & Ecology — Perennially wet places in seasonally dry wet-savannah, upland plateaus.

Additional specimens (see Fig. 6d for province map). ANGOLA, Lunda, R. Lalege, 14 Aug. 1927, Carrisso & Mendon ҫa 245a (COI); Uíge, Mucaba swampy area, S7°13' E15°5', alt. 1209 m, 23 Feb. 2017, T. Lautenschläger 2017-02-113 (DR). – DRC, Haut-Katanga, Parc National de l’Upemba, Kiluba, Luswahila, alt. 1880 m, 16 Jan. 1948, G.F. de Witte 03249 (BR); Parc National de l’Upemba, Kaziba, alt. 1300 m, 18 Apr. 1949, G.F. de Witte 06261 (BR); Haut-Katanga / Haut-Lomami, Parc National de l’Upemba, alt. 1680 m, 24 Aug. 1949, G.F. de Witte 07540 (BR).

Note — Hybridisation with D. madagascariensis has been observed, the hybrids show characteristics of both species (Robinson et al. 2017).