Drosera madagascariensis DC. [family DROSERACEAE]

Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (1959) Author: J.R. LAUNDON
Names
Drosera madagascariensis DC. [family DROSERACEAE], Prodr. 1: 318 (1824); Diels in E.P. IV. 112: 98 (1906); Taton in F.C.B. 2: 554 (1951). Type: Madagascar, locality and collector unknown (G–DC, holo., K, photo.!)
Drosera ramentacea [family DROSERACEAE], sensu auct., pro parte, non Burch. ex DC.
Drosera congolana Taton [family DROSERACEAE], in B.J.B.B. 17: 310 (1945); F.C.B. 2: 552 (1951). Type: Belgian Congo, Bas-Congo, Bequaert 7191 (BR, holo.!)
Information
Caulescent perennial, but sometimes apparently acaulescent by reduction. Stem to 25 cm. long. Leaves spirally arranged, erect at the top of the stem, but reflexed lower down; blade elliptic, obovate or spathulate, 5–15 mm. long and 2–5 mm. broad, glandular, especially towards the margins on the upper surface and sparsely pilose on the lower surface; petiole 10–30 mm. long and 0.3–1 mm. broad, glabrous or pilose above, usually pilose (rarely glabrous) below. Stipules oblong, up to 5 mm. long and 1 mm. broad, lacerated at the apex. Peduncles 1–2, 9–55 cm. long, arising laterally below the top of the stem, then curving to become erect, glabrous, glandular or pilose; inflorescence 2–14-flowered; pedicels 1–10 mm. long, glandular or pilose; bracts linear, 3 mm. long, sparsely pilose, caducous. Sepals 5, elliptic or oblong-lanceolate, 4–7 mm. long, 1–2 mm. broad, glandular-pilose. Petals 5, 5–8 mm. long, pink or purple. Stamens 5; filaments 5 mm. long. Ovary subglobose; styles 3, 2 mm. long, bifid nearly to the base. Seeds fusiform, 0.7–0.9 mm. long, 0.2 mm. broad, brownish-black; testa reticulate, with longitudinal and transverse ridges. Fig. 1/8, p. 3.
Range
DISTR. U2, 4; K3; T1, 4, 7, 8 throughout tropical and subtropical Africa from French Sudan and French Guinea to Natal and Cape Province (Pondoland); also in Madagascar
Altitude range
900–2300 m.
Distribution
KENYA Uasin Gishu District Sergoit R., Soy Pool, 11 Jan. 1948, Bickford in Bally 6259!TANGANYIKA Bukoba District Biharamulo road 5 km. [from Bukoba], Aug. 1931, Haarer 2055!;TANGANYIKA Rungwe District Kiwira R., May 1953, Eggeling 6519!;TANGANYIKA Songea District about 12 km. W. of Songea, 5 Feb. 1956, Milne-Redhead & Taylor 8490!UGANDA Kigezi District Kachwekano Farm, June 1951, Purseglove 3633!;UGANDA Masaka District E. side of Lake Nabugabo, 6 Oct. 1953, Drummond & Hemsley 4651!;UGANDA Mengo District Namanve swamp, July 1932, Eggeling 459 in F.D. 795!
Notes
VARIATION. Specimens from Bas-Congo (Belgian Congo), Mt. Mlanje (Nyasaland), the Transvaal and Natal usually have very short stems and comparatively few reflexed leaves. Such plants have often been confused with truly acaulescent species (i.e. D. burkeana Planch., D. natalensis Diels) or described as new to science (i.e. D. congolana Taton). It is not known whether these forms are due to genetic differences or differences in environment. The extreme form of this type, with long petioles, was named var. major Burtt-Davy & Greenway by Burtt-Davy in Man. Fl. Pl. Transv. 1: 39 (1926).
Drosera madagascariensis DC. [family DROSERACEAE]
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