100 LXXXIV. APOCYNACEZ (STAPF). [ Plecocarpa. 
subelliptic, obtusely acuminate (acumen linear, obtuse, up to 9 lin. long), 
acute or acuminate at the base, 3-6 in. long, 1—2 in. broad, chartaceous, 
glossy above; secondary nerves about 20 on each side, straight, sub- 
horizontal, very fine, slightly raised on both sides, with very similar 
tertiary nerves between them, which are (like the delicate veins) quite 
obscure below and faintly raised above ; petioles 2-4 lin.long. Flowers 
few to many in axillary clusters, often from the axils of fallen leaves, 
rarely from those of the uppermost pair and then apparently terminal. 
Calyx ? lin. long ; sepals ovate, acute or subacuminate. Corolla white, 
fragrant ; tube 34—7 (usually 4-5) lin. long; lobes more or less oblong, 
obtuse, 24-35 lin. long. Carpels 2, 2-ovuled. Berries fig-shaped, 8-9 
lin. long, 5—6 lin. in diam.—K Schumann in Engl. & Prantl, Pflanzen- 
fam. iv. ii. 135. Hunteria ambiens, K. Schum. in Engl. Jahrb. xxiii. 
223; Hallier f. Kautschuklianen in Jahrb. Hamburg. Wissensch. 
Anstalt. xvii. (1899), 3. Beih. 191. 
Upper Guinea. Cameroons: Cameroon Mountain, 4000 ft., Mann, 1213! 
Barombi, 1300 ft., Preuss, 44! Johann Albrechts Héhe, 1300-1400 ft., Staudt, 
573! 683! 794! Bipinde, 360 ft., Zenker, 1658! 1660! 1728! Bijoka, 500 ft., 
Zenker! Lolodort, 1500 ft., Staudt, 93! Yaunde, Zenker, 501! 753! Zenker § 
Staudt, 611! Efulen, Bates, 368! Ra 
6. P. Welwitschii, Stapf ex Hiern in Cat. Afr. Pl, Welw. i. 665. 
A tree, 10-18 ft. high; branches spreading, flexuous. Leaves mostly 
ternate, rarely opposite, oblong, obtuse or obscurely acuminate, subacute 
or obtuse at the base, 4—6 in. long, 1-24 in. broad, coriaceous, glossy 
above, dull green beneath, almost glaucous; secondary nerves subhori- 
zontal, about 10-15 on each side, very faint; veins obscure; petioles 
6 lin. long. Flowers in small axillary clusters, sessile. Calyx } lin. 
long ; sepals broadly ovate, very obtuse. Corolla-tube white, 34 lin. long, 
slightly widened above the middle ; lobes yellow, spreading, roundish- 
ovate, } lin. long. Carpels 2, 2-ovuled. Berries obovoid or pear-shaped, 
5-6 lin. long.—Hunteria pycnantha, Hallier f. Kautschuklianen in 
Jahrb. Hamburg. Wissensch. Anstalt. xvii, (1899), 3. Beih. 191 partly, 
not of K. Schum. 
dake Guinea. Angola: Golungo Alto; by the Cuango stream, Welwitsch, 
ie 
South Central. Angola: Lunda; Luachim River, Buchner, 621! 
Welwitsch states (in MS.) that this tree is extremely rich in a milky juice which 
dries to an elastic rubber. 
A plant collected in Lunda, on the Lulua River, by Pogge (1630 !) was referred 
by Hallier f., l.c., to Hunteria pyenantha, which it certainly is not, but the specimen 
is too defective for determination. 
7. P. micrantha, Stapf. A small tree, 20 ft. high; young 
branches slender, terete; old bark grey. Leaves opposite or ternate, 
oblong, abruptly and shortly acuminate (acumen subacute), acute at 
the base, 4—6 in. long, 14—24 in. broad, chartaceous, dull green, slightly 
shining above ; secondary nerves about 20 on each side, very fine, sub- 
horizontal, straight, faintly raised on both sides, but more distinctly 
