Drosera elongata Exell &amp; J. R. Laundon
Creators: name: Rjosk, A.
name: Neinhuis, C.
name: Monizi, M.
name: Lautenschläger, T.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Droseraceae
Drosera
Drosera elongata

description: 4. <i>Drosera elongata</i> Exell &amp; J.R.Laundon — Fig. 6 <i>Drosera elongata</i> Exell &amp; J.R.Laundon (1955b) 42; J.R. Laundon (1970) 29; A.S.Rob. et al. (2017) 1384. — Type: <i>A.W. Exell &amp; F.A. Mendon ҫa 1268</i> (holo BM), Angola, Lunda Sul, Luma-Cassai, ‘Tenga’, 27 Apr. 1937. Slender, scrambling, caulescent herb. <i>Stems</i> up to 90 cm long, c. 1 mm diam, flexuous, pilose to densely pilose (Fig. 6b). <i>Leaves</i> 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. <i>Inflorescences</i> 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. <i>Sepals</i> 5, lanceolate to elliptic, 3–5 by 1–2 mm, connate at the base, apex obtuse or acute, glan- dular-pilose. <i>Petals</i> 5, obovate, 4–6 by 2–3 mm, obtuse, pink. <i>Stamens</i> 5, filaments 2–4 mm long. <i>Pollen</i> 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. <i>Pistil</i>: ovary c. 1 by 1.5 mm, glabrous; styles 3, 2-partite at the base. <i>Seeds</i> 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 &amp; Ecology — Perennially wet places in seasonally dry wet-savannah, upland plateaus. <i>Additional specimens</i> (see Fig. 6d for province map). ANGOLA, <i>Lunda</i>, R. Lalege, 14 Aug. 1927, <i>Carrisso &amp; Mendon ҫa 245a</i> (COI); <i>Uíge</i>, Mucaba swampy area, S7°13' E15°5', alt. 1209 m, 23 Feb. 2017, <i>T. Lautenschläger 2017-02-113</i> (DR). – DRC, <i>Haut-Katanga</i>, Parc National de l’Upemba, Kiluba, Luswahila, alt. 1880 m, 16 Jan. 1948, <i>G.F. de Witte 03249</i> (BR); Parc National de l’Upemba, Kaziba, alt. 1300 m, 18 Apr. 1949, <i>G.F. de Witte 06261</i> (BR); <i>Haut-Katanga / Haut-Lomami</i>, Parc National de l’Upemba, alt. 1680 m, 24 Aug. 1949, <i>G.F. de Witte 07540</i> (BR). Note — Hybridisation with <i>D. madagascariensis</i> has been observed, the hybrids show characteristics of both species (Robinson et al. 2017).
description: Published as part of <i>Rjosk, A., Neinhuis, C., Monizi, M. &amp; Lautenschläger, T., 2022, Synopsis of the genus Drosera (Droseraceae) in Angola and the Democratic Republic of the Congo, pp. 1-14 in Blumea - Biodiversity, Evolution and Biogeography of Plants 67 (1)</i> on page 7, DOI: 10.3767/blumea.2022.67.01.03, http://zenodo.org/record/7679465
description: {"references": ["Laundon JR. 1970. Droseraceae. In: Wittnich Carisso L (ed), Conspectus Flo- rae Angolensis. Instituto Botanico de Coimbra &amp; British Museum, Lissabon.", "Robinson A, Gibson R, Gonella P, et al. 2017. Drosera of the World - volume 3, Latin America, Africa. Redfern Natural History Productions, Poole."]}