52 Lxxxiv. APOCYNACEiE (stapf). [Lci7idolphia. 



diam. ; rind hard ; seeds over 50, compressed oblong to almost square 

 in outline, 1 Jin. long. — Jumelle, PI. a caoutch. et a gutta, 48 ; Mikosch 

 in Wiesner, Rohstoffe, ed. 2, ;)62 ; Hallierf. Kautschuklianen in Jahrb. 

 Hamburg. Wissensch. Anstalt. xvii. (1800), ;^. Beih. 43-45, and in 

 Bot. Central bl. Ixxxiii. (11)00) 255; Warb. Kautschukpfl. 119; Sclilechter, 

 Westafr. Kautschuk-Exped. 81, S2, 229, 306, 83 with fig. L. oivai'iensis 

 Dew^vre, Caoutch. Afr. Monogr, Landolph. 36 (the Gaboon plant). 



Upper Guinea. South-eastern Cameroons : banks of the Jah River, SchlecJiter, 

 12770. 



lower Guinea. Gaboon, KJaine, 850 ! French Congo : near Lake Ouanga or 

 lonanga. Griffon du Bellay ; bmks of the River Sanga, near Bonga, Schlechter, 

 12660, and between Bonga and Woso, Schlechter, 12689. Lower Congo, Smith ! 



Mann's specimen from Corisco Bay, referred to in Kew Report, 1880, 39, as 

 L. Mannii, Dyer, is almost certainly identical with X. Klainei. It consists only of 

 a few leaves and some f rnits, not quite so large as in the figui e by Delpy (distributed 

 by Pierre) from one of Klaine's specimens, but otherwise very similar. They are 

 covered with an extremely delicate and velvety brovn tomentum, which is not 

 represented in Delpy's drawing. It is, however, so fine that the fruit appears 

 smooth, and it may therefore have been overlooked. Mann calls the plant " the 

 African Rubber plant," whilst Pierre says that L. Klainei is the principal rubber 

 vine in the Gaboon district. L. Mannii has been quoted very frequently (Moloney, 

 Forestry West Afr. 382 ; Kew Bulletin, 1892, 68 ; K. Schura. in Engl. Jahrb. xv. 409 ; 

 L. Planchon, Prod. Apocyn, 320; Dewevre, Caoutch. Afr. Monogr. Landolph. 56 partly ; 

 Morris in Journ. Soc. Arts, xlvi. 775; Jumelle, PI. a caoutch. et a gutta, 45; Warb. 

 in Tropenpfl. iii. (1899) 314 and in Kautschukpfl. 120; Hallier f. Kautschuklianen in 

 Jahrb. Hamburg. Wissensch. Anstalt. xvii. (1899), 3. Beih. 98 ; Henriques, Kautschuk, 

 Tab. iii.), but it seems solely on the authority of the Kew Report for 1880. 



21. Li. Dewevrei, Stapf. A scandent (?) shrub ; (tendrils not seen). 

 Young branches slender, pubescent, at length glabrescent and dotted 

 with scattered whitish lenticels. Leaves oblong, acuminate (acumen up 

 to 5 lin. long, linear from a broader base, obtuse), rarely subacute at 

 the base, 3-4 in. long, IJ- 1 J in. broad, thinly coriaceous, glabrous or 

 very scantily pubescent on the midrib below when young, reddish- 

 brown when dry; midrib channelled above, prominent below; secondary 

 nerves subhorizontal, straight, 11-13 on each side, very slender, slightly 

 raised below ; reticulation very delicate and inconspicuous ; petiole 

 slender, l^^-J ^^^- ^^^o- Corymbs terminal or pseudo-axillary, very 

 shortly peduncled, contracted, small ; peduncle f ulvo-tomentose or 

 pubescent ; bracts obovate-oblong to ovate, subacute, fulvo-pubescent ; 

 pedicels very short. Calyx 1^ lin. long ; sepals subscarious, broadly 

 ovate or oblong, very obtuse, keeled, ciliate, otherwise glabrous or almost 

 so and shining. Corolla finely pubescent without except at the base ; 

 tube widest between the middle and the mouth, 2 lin. long, quite 

 glabrous within ; lobes linear-oblong, as long as or slightly shorter than 

 the tube. Stamens inserted in the upper third of the tube ; anthers 

 lanceolate, subacute, J lin. long. Ovary ovoid, gradually passing into 

 the short style, upper part long villous ; stigma cylindric from a 

 thickened base, bifid. 



South Central. Congo Free State, Dewevre, 888 ! 



