Drosera flexicaulis Oliv.
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 flexicaulis

description: 5. <i>Drosera flexicaulis</i> Welw. ex Oliv. — Fig. 7 <i>Drosera flexicaulis</i> Welw.ex Oliv.(1871) 403; Diels (1906) 98; G.C.C. Gilbert (1951) 554;A.S.Rob. et al. (2017) 1398. — Lectotype (designated by Diels (1906) 98): <i>F.M.J. Welwitsch 1181</i> (lecto LISU), Angola, Huíla, Lopollo, Dec. 1859. Perennial herb, caulescent. <i>Stems</i> up to 25 cm long, erect, slender, glabrous (Fig. 7b). <i>Leaves</i> alternate, clustered somewhat into a rosette towards the apex, all leaves including lower leaves mostly erect or ascending (sometimes reflexed); stipules 1–2 mm long, connate at the base, apex lacerated, ferrugine- ous; lamina lanceolate, narrowly spathulate-ovate or spathulate, 3–15 by 1–5 mm, bearing tentacles adaxially and around the margins, glabrous or sparsely pilose abaxially (Fig. 7a); petioles 0.5–3.2 cm long, slender, glabrous or sparsely pilose. <i>Inflorescences</i> cymose, with 3–13 flowers; peduncles 1–4 together, 8–21(–30) cm long, ascending, glabrous;bracts filiform to linear, c. 2 mm long, caducous; pedicels 1–10 mm long, erect, glabrous or sparsely pilose. <i>Sepals</i> 5, oblong to lanceolate, 4–7 by 1–2 mm, connate at the base, sparsely pilose to pilose. <i>Petals</i> 5, obovate, 5–8 by 2.5–4 mm, white or purple. <i>Stamens</i> 5, filaments 4–5 mm long. <i>Pollen</i> in tetrads, tetrads c. 45–52 µm diam, single grains c. 25–30 µm diam, echinate (Fig. 7e), echini conical, c. 2 mm long, in low density, with short clavate sculptural elements between echini. <i>Pistil</i>: ovary subglobose to ovoid, c. 2 by 1 mm, glabrous; styles 3, c. 2.5 mm long, 2-partite to the base. <i>Seeds</i> fusiform, 0.7–0.9 by c. 0.2 mm, black, shiny, testa reticulate. Distribution — Angola, DRC, Zambia (Fig. 7c). Habitat &amp; Ecology — Grows on sand and peat, in grassy swamps, seasonally dry wet-savannah. <i>Additional specimens</i> (see Fig.7d for province map). ANGOLA, <i>Bié</i>, junto à margem do rio Chitembo,alt. 1500 m, 31 Oct.1966, <i>Teixeira et al. 10901</i> (BR); Cusseque – TFO core site, hilly landscape, fire in last dry season, S13°42' E17°5', 19 Oct. 2012, <i>M. Finckh 135547</i> (HBG); Cusseque – TFO core site, plain:alluvial plain,fire in last dry season, S13°41' E17°6',alt. 1515 m, 29 Oct. 2011, <i>M. Finckh 132756</i> (HBG); <i>Cuando Cubango</i>, Menongue, Vila Serpa Pinto, pr. da confluencia do Cambumbé com o Cuebe, alt. 1420 m, 12 Feb. 1960, <i>E.J. Mendes 2484</i> (BR, COI); Menongue, andados 14 km de Vila Serpa Pinto para Longa, vale do Cambumbé,alt. 1430 m, 26 Feb.1960, <i>E.J. Mendes 2754</i> (COI); <i>Cuanza Sul</i>, am Longa oberh. Minnesera, alt. 1230 m, 1 Feb.1900, <i>H. Baum 687</i> (HBG); <i>Lunda Sul</i>, Saurimo, 25 Oct.1932, <i>R.G.N. Young 1167</i> (COI). – DRC, <i>Haut-Katanga</i>, 6 km à l’WNW de la touree Oee de la Lut., Plateau des Kundelungu, alt. 1680 m, 25 Mar. 1969, <i>S. Lisowski et al. 3789</i> (BR); près de la touree Oee de la Lut., Plateau des Kundelungu,alt. 1670 m, 26 Mar. 1969, <i>S. Lisowski et al. 3552</i> (BR); 2 km a l’E des tourees de la Lut., Plateau des Kundelungu, alt. 1600 m, 8 Jan. 1971, <i>S. Lisowski et al. 13079</i> (BR); <i>Lualaba</i>, Plateau de la Manika (environs Katentania), Nov. 1912, <i>Homblé 774</i> (BR); village Matoki, Plateau de la Manika, alt. 1400 m, 20 Jan. 1969, <i>S. Liswoski et al. 5</i> (BR); Kisoté, Plateau de la Manika, alt. 1500 m, 5 Apr. 1969, <i>S. Lisowski et al. 4181</i> (BR); 2 km à l’W de la riviere Musonai vers le village Djoni, Plateau de la Manika, alt. 1420 m, 23 Mar. 1969, <i>S. Lisowski et al. 5651</i> (BR). Note — This species has been treated as a synonym of <i>D. affinis</i> in several Floras (Laundon 1959, 1970, 1978). After morphological analysis this work follows the Flora of Tropical Africa (Oliver 1871) and treats <i>D. flexicaulis</i> as a separate species. Both species share the same habitat and have overlapping distributions.Additionally, hybrids of <i>D. flexicaulis</i> and <i>D. affinis</i> occur, which show characters of both parent 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 pages 7-9, DOI: 10.3767/blumea.2022.67.01.03, http://zenodo.org/record/7679465
description: {"references": ["Diels L. 1906. Droseraceae. In: Engler A (ed), Das Pflanzenreich IV. 112. Engelmann, Leipzig.", "Gilbert G. 1951. Droseraceae. In: Flore du Congo Belge et du Ruanda-Urundi. Institut national pour l'etude agronomique du Congo Belge.", "Laundon JR. 1959. Droseraceae. In: Hubbard CE, Milne-Redhead E (eds), Flora of Tropical East Africa. Crown Agents for Oversea Governments and Administrations, London.", "Laundon JR. 1970. Droseraceae. In: Wittnich Carisso L (ed), Conspectus Flo- rae Angolensis. Instituto Botanico de Coimbra &amp; British Museum, Lissabon.", "Laundon JR. 1978. Droseraceae. In: Launert E (ed), Flora Zambesiaca. Flora Zambesiaca Managing Committee, London.", "Oliver D. 1871. Leguminosae to Ficoideae. In: Flora of Tropical Africa. Reeve &amp; Co., London.", "Robinson A, Gibson R, Gonella P, et al. 2017. Drosera of the World - volume 3, Latin America, Africa. Redfern Natural History Productions, Poole."]}