120 LXXXIV. APOCYNACEZ (STAPF). [ Plumeria. 
1. P. rubra, Linn. Sp. Pl. 209. A shrub or small tree. Leaves 
crowded near the ends of the branches, oblong or elliptic-oblong, acute 
at both ends, or the tips subacuminate, 6-12 in. long, 2-4 in. broad, 
herbaceous, quite glabrous; secondary nerves 25-40 on each side, 
horizontal in the lower, slightly oblique in the upper part ; petiole 
puberulous, 1-2 in. long. Corymbs many-flowered, umbelliform ; 
peduncle 2-6 in. long, stout, puberulous; pedicels up to } in. long. 
Calyx scarcely 1 lin. long. Coroila pink ; tube }—3 in. long ; lobes obo- 
vate-oblong, 1-1} in. long. Follicles 8 in. long, 14 in. wide.— Bot. Mag. 
t. 279; Lam. Encycl. ii. 308,’t. 173, fig. 1; DC. Prod. viii. 390 ; Bot. 
Reg. t. 780; Reichb. Fl. Exot. t.175; Hiern in Cat. Afr. Pl. Welw. 
i. 667. Plumiera rubra, K. Schum. in Engl. & Prantl, Pflanzenfam. 
iv. ii. 136. P. rosea, (error for P. rubra), K. Schum. in Engl. Pf. Ost- 
Afr. C. 315. 
Lower Guinea, Angola: Loanda, cultivated, Welwitsch, 5985. 
Mozamb. Dist. Zanzibar, Stuhlmann. 
Probably a native of Central America; frequently cultivated in the trop‘es. 
Imperfectly known species. 
2. P. africana, Will. Gard. Dict. ed. 8, No. 5. Leaves linear- 
lanceolate, 9-10 in. long, 2 in. broad, rather succulent, acute, slightly 
rounded at the base. Flowers yellow. 
Upper Guinea. Senegal, Adanson. 
This was described from specimens raised from seeds brought home by Adanson. 
It has not been observed again. 
16. ALSTONTIA, R. Br.; Benth. et Hook. f. Gen. PI. ii. 705. 
Calyx small, eglandular within; sepals 5, almost free or distinctly 
united at the base, imbricate, more or less ovate. Corolla salver- 
shaped; tube cylindric, slightly widened below the mouth (or near the 
middle in short-flowered species), more or less callous at the mouth ; 
lobes rounded to lanceolate, contorted, overlapping either way. Stamens 
in the widened part of the corolla-tube, included ; filaments filiform, 
short. Anthers free from the stigma, ovate to ovate-oblong, subacute, 
2-lobed at the base; anther-cells polliniferous and dehiscing to the 
base. Disc 0, or obscurely annular, or (Sect. Blaberopus) tubular, 
adnate to the base of the ovary and produced into 2 lobes, alternating 
with the carpels. Carpels 2, free or coherent in flower, frequently 
slightly immersed in the torus; style filiform, often very short ; stigma 
oblong, 2-lobed or 2-tid, with a ring or reflexed frill at the bases 
ovules numerous, pluriseriate. Mericarps 2, follicular, usually long 
cylindric, slender. Seeds oblong, compressed, attached by the cent? 
with long hairs all round the edges, but chiefly at both ends, of 
shortly ciliate on the sides, glabrous or pubescent on the faces; te - 
very thin; endosperm fleshy. Embryo in the longitudinal axis of the 
seed; cotyledons oblong, flat, foliaceous; radicle about as long as the 
