102 LXXXIV. APOCYNACE (STAPF). | Pleiocarpa. 
Imperfectly known species. 
10. P. breviloba, Stapf. Young branches slender, subangular; 
lenticels scanty, minute. Leaves opposite, elliptic-lanceolate, acumi- 
nate (acumen sublinear, subobtuse), gradually narrowed into the petiole, 
43-6 in, long, 13-2 in. broad, chartaceous-membranous, shining on 
both sides; secondary nerves mixed with tertiary nerves, which (like the 
reticulating veins) are slightly raised, especially above ; petiole 3—5 lin. 
long. Flowers subsessile, in sessile compact axillary clusters. Calyx 
scarcely } lin. long; sepals ovate, acute. Corolla-tube 24-3 lin. long; 
lobes ovate, obtuse, hardly 1 lin. long. Carpels 2.—Hunteria breviloba, 
Hallier f. Kautschuklianen in Jahrb. Hamburg. Wissensch. Anstalt. 
xvii. (1899), 3. Beih. 189, and in Schlechter, Westafr. Kautschuk.- 
Exped. 306. 
Lower Guinea. French Congo: in forests near the River Sanga, between 
Woso and Benga, Schlechter, 12706, 
This is, no doubt, a true Pleiocarpa, very near P. Welwitschii and 1 . tubicina, 
if it is not identical with one of them. 
11. P. camerunensis, Stapf A shrub 3-9 ft. high; young 
branches slender, angular, green; the older rough with lenticels. 
Leaves elliptic- to lanceolate-oblong, abruptly acuminate (acumen 
obtuse, up to 7 lin. long), 34-6 in. long, 14-2} in. broad, chartaceous 
or papery, dull or pale green; midrib channelled, with a more or less 
distinct central longitudinal ridge ; secondary nerves obliquely spreading, 
about 10 on each side, faintly raised above and below; veins obscure ; 
petiole 3-4 lin. long. Flowers in few- to many-flowered axillary or 
pseudoterminal sessile compact clusters. Calyx } to almost 1 hn. 
long; sepals ovate-triangular, acute, herbaceous, with an entire oF 
lobed scale-like gland at the base within. Corolla white; tube 14 in. 
long, with a callous ring at the mouth; lobes oblong, obtuse, as long as 
the tube. Carpels 2; ovules 4 in each cell.— Hunteria camerunensis, 
Hallier f. Kautschuklianen in Jahrb. Hamburg. Wissensch. Anstalt. 
xvii. (1899), 3. Beih. 187. 
Lower Guinea. Cameroons; Bipinde, by streamlets, in shady forest, 300- 
350 ft., Zenker, 1211! 1620! 2311! 
I have little doubt that this isa Pleiocarpa ; but asthe material at my disposal is 
very scanty, I am unable to work out its affinity. Hiallier states that there 9ré 
8 ovules in 4 rows in each carpel; 1 have not been able to find more than 4 in each 
carpel. 
12. P. microcarpa, Stapf. Branches pale brown, with warty 
lenticels. Leaves ternate, oblong, abruptly acuminate (acumen linear, 
obtuse, up to 5 lin. long), acuminate at the base, 44-7 in. long, 13-2} 
in. broad, almost glaucous below; secondary nerves subhorizontal, 16- 
20 on each side, raised on both sides; veins delicate, surrounding 
horizontal areoles; petioles 4-6 in. Jeng. Flowers in sessile axillary 
