58 LXXXIV. APOCYNACEE (STAPF). | Landolphia. 
Mtigua, Stuhlmann, 472; Oalle (Wala) River, Stuhlmann, 515, and Tabora, Stuhl- 
mann, 567 ; these specimens probably belong to LZ. Thollonii. 
26. L. Thollonii, Dewevre, Caoutch. Afr. Monogr. Landolph. 50. A 
dwarf shrub, rising scarcely more than } ft. above the ground; young 
branches brown, shortly pubescent, finally sometimes glabrescent ; old 
stems rough from small lenticels. Leaves narrowly oblong to lanceolate, 
obtusely subacuminate, rounded at the base, 1-24 in. long, 4—9 lin. 
broad, scantily pubescent or villous in bud, very soon quite glabrescent 
(except the midrib) or finally quite glabrous; midrib sunk above, 
prominent below; secondary nerves 17-20 on each side, straight, 
connected close to the margin by flat arches, like the fine reticulation 
slightly raised above, less so below; petiole pubescent, 1-2 Jin. long. 
Corymbs small, 4—5-flowered, shortly peduncled, dense, terminal ; 
peduncle }—4 lin. long ; bracts pubescent ; pedicels 2 lin. long, or hardly 
any. Calyx 14 lin. long; sepals very broad, obovate, rounded or trun- 
cate, densely fulvo-tomentose, obscurely keeled. Corolla-tube widest 
between the middle and the mouth, 2-2} lin. long, finely velvety with- 
out, pubescent within down to the middle; lobes broadly oblong, over 
3 lin. long, fulvo-velvety without, margins wavy. Stamens inserted in 
the upper } of the tube ; anthers apiculate, } lin. long. Ovary ovoid, 
villous, chiefly above. Fruit globose, over 1 in. in diam. ; seeds sub- 
globose, 3 lin. in diam.—Warb. Kautschukpfl. 120.  Z. owariensis, 
var. parvifolia, Hallier f. Kautschuklianen in Jahrb. Hamburg. 
Wissensch. Anstalt. xiv. (1899), 3. Beih. 41, 74, partly. 
Lower Guinea. French Congo: Brazzaville, Brazza & Thollon, 145! Lower 
Congo: Kisantu, Gillet, 69! Tampa, Laurent! Angolat Kuango River, Mechow, 
510! 
This is one of the plants yielding “root 1ubber.” A very similar but evidently 
distinct plant has recently been distributed as Carpodixus chylorrhiza, K. Schum. 
MS. It was collected by Baum (714) in Angola, above Sakkemecho on the River 
Quiriri. The leaves are ‘on the whole longer and narrower and the midrib is much 
broader, and flatter below. There are no flowers with the specimens. The fruit 1s 
globose or pyriform, 1 in, in diam, 
Imperfectly known species. 
27. L. Foreti, Jumelle in Compt.-rend. Acad. Sc. Paris, exxiv. 
(1897) 1539-1541. A quite glabrous climber by means of hook- 
branched pseudo-axillary tendrils; young branches reddish-brown, 
covered with yellowish lenticels. Leaves ovate, long acuminate, rounded 
at the base, very large, 14 in. long, 8 in. broad ; secondary nerves 12-14 
on each side, slightly oblique, connected by submarginal arches, promi- 
nent below ; petiole 74 lin. long. Cymes dense; flowers small, white, 
inodorous. Fruit globose, up to 6 in. in diam.; seeds about 60.— 
Pierre in Bull. Soc. Linn. Paris, 1898, 14; Jumelle, Pl. & caoutch. et 
a gutta, 45, figs. 5 and 6; Mikosch in Wiesner, Rohstoffe, ed. 2, i. 362 ; 
Hallier f. Kautschuklanen in Jahrb. Hamburg. Wissensch, Anstalt. 
xvii. (1899), 3. Beih. 79; Warb. Kautschukpfl. 119, 
