Schrebera trichoclada Welw. [family OLEACEAE]

Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora Zambesiaca
Resource Type
Reference Sources
Entry From
FZ, Vol 7, Part 1, page 300, (1983) Author: F. K. Kupicha
Names
Schrebera koiloneura var. kakomensis Lingelsh. apud Gilg & Schellenb. [family OLEACEAE], tom. cit.: 66 (1913). Type from Tanzania.
Schrebera schellenbergii Lingelsh. [family OLEACEAE], in Engl., Pflanzenr. IV, 243: 98 (1920). — Topham, N.C.L. ed. 2: 72 (1958). Type from Angola.
Schrebera trichoclada Welw. [family OLEACEAE], in Trans. Linn. Soc. 27: 41 (1869). — Baker in F.T.A. 4 15 (1902). — Tun–ill in F.T.E.A., Oleaceae: 2 (1952). — Topham, N.C.L. ed. 2: 72 (1958), — F. White, F.F.N.R.: 338 (1962). — Liben in Fl. d’Afr.Centr., Oleaceae: 4, t. 1 (1973). — Fanshawe, Check–list Woody Pl. Zamb.: 39(1973). — R.B. Drumm. in Kirkia 10: 267 (1975). TAB. 69. Lectotype from Angola.
Schrebera golungensis Welw. [family OLEACEAE], tom. cit.: 40, t. 15 (1869). — Baker tom. cit.: 14(1902). — Topham, N.C.L. ed. 2: 72 (1958). Type from Angola.
Nathusia trichoclada Welw. 0. Kuntze [family OLEACEAE], Rev. Gen. Pl. 2: 412 (1891). Type as for Schrebera trichoclada.
Nathusia golungensis Welw. 0. Kuntze [family OLEACEAE], loc. cit. Type as for Schrebera golungensis.
Schrebera buchananii Baker [family OLEACEAE], in Kew Bull. 1895: 95 (1895); loc. cit. — Topham, N.C.L. ed. 2: 72 (1958). Type: Malawi, Shire Highlands, Buchanan 418 (K, holotype).
Schrebera affinis Lingelsh. apud Gilg & Schellenb. [family OLEACEAE], in Engl., Bot. Jahrb. 51: 65 (1913). Type from Angola.
Schrebera koiloneura Gilg apud Gilg & Schellenb. [family OLEACEAE], loc. cit. Type from Tanzania.
Information
Shrub or bushy tree 2–10 m. tall, the trunk with rough grey flaking bark. Young shoots whitish–pilose or less often glabrous. Leaves simple; petioles 5–15 mm. long, without articulation, usually softly hispid. Leaf lamina 4·5–14 x 2·5–7·5 cm., elliptic, oblong–elliptic or ovate, the apex rounded, acute, acuminate or apiculate, the base acute; leaves occasionally glabrous but usually upper surface at first pubescent, later glabrescent and lower surface softly hispid especially on main veins. Leaf venation, including the fine tertiary reticulation, clearly visible; main nerves impressed on upper surface, prominent below, reticulation raised on both surfaces. Inflorescence a terminal few– to several–flowered cyme 3–6 cm. long; bracts and bracteoles inconspicuous and soon deciduous; axes glabrous to tomentose; pedicels 2–16 mm. long. Calyx 2–4 mm. long, glabrous or puberulous, truncate or irregularly 4–5–lobed at apex. Corolla cream–coloured or greenish; tube 13–21 mm. long, pilose inside near the base; lobes (5) 6 (7), 5–8 (11) x 3–4– (10) mm., unevenly obovate with apex obtuse or emarginate, each with a patch of dense maroon to dark brown dilated hairs extending from the corolla mouth almost to the petal margin. Anthers 2–3 mm. long, on filaments up to 1 mm. long; flowers dimorphic: stamens inserted near the top of the corolla so that the anthers either reach the corolla mouth or are 1·5–3 mm. distant from it. Style correspondingly either half as long as corolla tube or exserted. Fruit a woody bivalved pear–shaped capsule 4–6 cm. long, straw–coloured, often warty, splitting open at maturity; locules 2, each containing 2 winged seeds up to 5 cm. long and 2 under–developed seeds which remain united to form a woody compressed–elliptic structure.
Habitat
In thickets and savanna woodland, on rocky and sandy soils.
Distribution
Mozambique MS Maringue, fr. vi.1973, Bond 9B 103 (SRGH).Mozambique T Boroma area, near Mague, 270 m., fr. 23.vii.1950, Chase 2718 (BM; COI; LISC; SRGH).Mozambique Z between Nicuadala and Marral, fr. 26.vii.1942, Torre 4426 (BM; LISC).Malawi S Mulanje Distr., Tuchila Experimental Station, fr. 28.v.1964, Salubeni 323 (BM; MAL).Malawi C Kasungu Distr., Kasungu National Park, 1010 m., fr. 15.ix.1970, Hall–Martin 1484 (K; SRGH).Zimbabwe S Lundi R., fr. 30.vi.1930, Hutchinson & Gillett 3301 (BM).Zimbabwe E Mubare Distr., Commonage, Macequece road, 980 m., fl. 31.i.1954, Chase 5191 (BM; K; LISC; PRE; SRGH).Zimbabwe C Que Que Distr., Appleton road, c. 1275 m., st. 13. v.1976, Biegel 5303a (SRGH).Zimbabwe W Wankie Distr., 48 km. from Kazungulu on Victoria Falls road, fl. 16.xi.1974, Raymond 287 (SRGH).Zambia S Namwala Distr., Ngoma, Kafue National Park, fl. buds 7.i.1963, Mitchell 17/4 (FHO; SRGH).Zambia E Petauke Distr., 48 km. W. of Minga Forest Reserve, st. 24.v.1952, White 2885 (FHO; K).Zambia W Mwinilunga, fl. 3.x.1937, Milne–Redhead 2534 (BM; K; PRE).Zambia N Mporokoso Distr., Mwawe R., Mweru–wa–Ntipa, 880 m., fr. 6.viii.1962, Tyrer 322 (BM; SRGH).Mozambique N Meconta, c. 19 km. from Corrane to Liupo, c. 130 m., fl. 18.i.1964, Torre & Paiva 10058 (LISC).Malawi N Mzimba Distr., Kasitu R. bridge, c. 1070 m., fl. 28.i.1975, Pawek 8996 (MAL; SRGH).Zimbabwe N Gokwe Distr., below northern escarpment of Charama Plateau, 910 m., st. 27.iv.1965, Simon 257 (SRGH).Zambia B Zambesi Distr., fl., Gilges 321 (K; PRE; SRGH).Caprivi Strip 16 km. W. of Katima Mulilo, fr. 28.viii.1967, van Breitenbach 1221 (PRE).Botswana N Chobe Distr., Kasane, 910 m., fl. 5.i.1966, Mutakela 1/66/8 (SRGH).
Distribution (external)
Angola
Tanzania
Zaire
Notes
Fanshawe (loc. cit.) records 5. trichoclada from the central province of Zambia. S. trichoclada is morphologically very close to the third African species of Schrebera, S. arborea A. Chev., and my delimitation of these two taxa is rather different from thatofLiben (in Fl.d’ Afr.Centr., Oleaceae: 2 (1973); note that S. arborea is called S. golungensis).The characters used by Liben to separate S. trichoclada and S. arborea were as follows:Lower leaf surface with main veins and reticulation in high relief; calyx strongly nerved; small trees of savanna and open foresttrichocladaLower leaf surface with main veins and reticulation scarcely raised; calyx smooth; tall trees of humid forestarboreaI disagree that the leaf and calyx differences given above are diagnostic, because both types are found in S. trichoclada in the F.Z. area. Instead, variable characters which appear to correlate well with each other and with plant habit and habitat are pedicel length and fruit shape, as in the following key:Pedicels of flowers at anthesis 2–16 mm. long; fruit pear–shaped, the two loculi of each valve constricted into deep crevices on either side of the septum (Tab. 69, fig. A7–9); trees and shrubs up to 10 m. tall, of open woodland trichocladaPedicels of flowers at anthesis 1–3 mm. long; fruit obovoid, the two loculi of each valve wide, not constricted, on either side of the septum (Tab. 69, fig. B1); tall forest trees of up to 40 m.arboreaUsing these characters, I would re–identify several of the Zaire collections listed by Liben under S. arborea (golungensis} as S. trichoclada: Devred 2394; Quarré 2602; Thiebaud 433 and Toussaint 122 & 2283. The type of S. golungensis, Welwitsch 933 from Angola, is a sterile shoot, its leaves having inconspicuous venation. Because he relied on the leaf–venation character, Liben made S. golungensis synonymous with S. arborea, and the former, earlier, name took precedence over the latter. However, leaves exactly similar to those of Welwitsch 933 have been seen on undoubted S. trichoclada from Mozambique, and I have little hesitation in sinking S. golungensis into S.trichoclada. I have seen specimens of S. arborea from W. Africa (Guinea–Bissau to Cameroon), Zaire, Uganda and the Sudan; as far as I know it does not occur in Angola.
Schrebera trichoclada Welw. [family OLEACEAE]
PDF

Related Materials