Drosera katangensis Taton
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 katangensis

description: 7. <i>Drosera katangensis</i> Taton — Fig. 9 <i>Drosera katangensis</i> Taton (1945c) 309;G.C.C. Gilbert (1951) 550,A.S.Rob. et al. (2017) 1422. — Type: <i>H. Homblé 773</i> (holo BR), DRC, Lualaba. Plateau de la Manika, Nov. 1912. Caulescent herb. <i>Stems</i> up to 15 cm long, erect, densely glandular (Fig. 9b). <i>Leaves</i> alternate, sparsely dispersed, basal leaves smaller; stipules c. 2 mm long, apex lacerated into setaelike segments; lamina oblong-spathulate, 5–15 by 1.5–5 mm, abaxially pilose (Fig. 9a); petiole 7–20 mm long, densely pilose/ hirsute. <i>Inflorescences</i> cymose, with up to 8 flowers; peduncles 1, up to 20 cm long, erect at the base, densely pilose/hirsute (often recurved hairs); bracts linear to lanceolate, c. 5 mm long, glandular; pedicels 2–3 mm long, pilose. <i>Sepals</i> 5, oblong, c. 8 by 2 mm, apex obtuse, adaxially densely pilose/hirsute. <i>Petals</i> 5, obovate, c. 12 by 4 mm, pink or pinkish. <i>Stamens</i> 5; filaments c. 6 mm long; anthers c. 1.5 mm long, sagittate. <i>Pistil</i>: ovary ovoid; styles 3, bipartite to the base, branches 2.5–3 mm long, ascending. <i>Seeds</i> fusiform, black. Distribution — DRC (Fig. 9c). Habitat &amp; Ecology — Wet plains. <i>Additional specimens</i> (see Fig. 9d for province map). DRC, <i>Haut- Katanga</i>, 63 km au N du Poste de Katshupa, Plateau des Kundelungu, alt. 1685 m, 28 Jan. 1967, <i>F. Malaisse 4986</i> (BR); Lusinga, Plateau des Kibara, 14 Apr. 1969, <i>S. Lisowski et al. 4659</i> (BR). Note — So far, this species has been collected only from Katanga Province (DRC), but it is likely to occur in neighbour- ing regions. The herbarium specimens (<i>F. Malaisse 4986</i> and <i>S. Lisowski et al. 4659</i>) share characters with <i>D. flexicaulis</i> and <i>D. elongata</i> (elongated stem, erect leaves) as well as with <i>D. bequaertii</i> (erect base of the peduncle, hairiness of leaves and peduncle). Since only few specimens have been collected so far, this species is not well studied. The shared characters with <i>D. flexicaulis</i>, <i>D. elongata</i> and <i>D. bequaertii</i> indicate that <i>D. katangensis</i> could be a hybrid of the above mentioned species (Robinson et al. 2017). The specimen <i>Homblé 774 in</i> particular could support that thesis. While three of the four plants are easily identified as <i>D. flexicaulis</i>, one plant looks similar to <i>D. katangensis</i> showing the erect base of the inflorescence and similar leaf shape and arrangement but it has only sparsely pilose petioles and stem. The examination of fresh material and molecular genetic analysis might shed further light on the taxonomic status of <i>D. katangensis</i>.
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 10, DOI: 10.3767/blumea.2022.67.01.03, http://zenodo.org/record/7679465
description: {"references": ["Taton A. 1945 c. Drosera katangensis. Bulletin du Jardin Botanique de l'Etat a Bruxelles: 309.", "Gilbert G. 1951. Droseraceae. In: Flore du Congo Belge et du Ruanda-Urundi. Institut national pour l'etude agronomique du Congo Belge.", "Robinson A, Gibson R, Gonella P, et al. 2017. Drosera of the World - volume 3, Latin America, Africa. Redfern Natural History Productions, Poole."]}