52 LXXXIV. APOCYNAVE& (STAPF). | Landolphia. 
diam.; rind hard; seeds over 50, compressed oblong to almost square 
in outline, 14in. long—Jumelle, Pl. 4 caoutch. et a gutta, 48 ; Mikosch 
in Wiesner, Rohstoffe, ed. 2, 362; Hallier f. Kautschuklianen in Jahrb. 
Hamburg. Wissensch. Anstalt. xvii. (1899), 3. Beih, 43-45, and in 
Bot.Centralbl. Ixxxiii. (1900) 255; Warb. Kautschukpfl. 119; Schlechter, 
Westafr. Kautschuk-Exped. 81, 82, 229, 306, 83 with fig. L. owariensis 
Dewévre, Caoutch. Afr. Monogr. Landolph. 36 (the Gaboon plant). 
Upper Guinea. South-eastern Cameroons : banks of the Jah River, Schlechter, 
12770. 
Lower Guinea. Gaboon, Klaine, 850! French Congo: near Lake Ouanga or 
Ionanga, Griffon du Bellay; binks 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 Z. Klainei. It consists only of 
a few leaves and some fruits, not quite so large as in the figuie 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 Z. Klainei is the principal rubber 
vine in the Gaboon district. Z. Mannii has been quoted very frequently (Moloney, 
Forestry West Afr. 382; Kew Bulletin, 1892,68 ; K.Schum. in Engl. Jahrb. xv. 409 ; 
L. Planchon, Prod. Apocyn, 320; Dewévre, Caoutch. Afr. Monogr. Landolph. 56 partly ; 
Morris in Journ. Soc, Arts, xlvi. 775; Jumelle, Pl. & 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. L. 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, 14-14 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, 1}-2} lin. long. Corymbs terminal or pseudo-axillary, very 
shortly peduncled, contracted, small; peduncle fulvo-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, } 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, Dew2vre, 888! 
