APOCYNACEAE 871 
Species more than 100 in all tropical regions, about 10 in the Philippines. 
1. Quite glabrous. 
2. Flowers double; cultivated only........-..2.2-....ccccc0ccceceeeeoes 1. T. divaricata 
2. Flowers single. 
3. Follicles oblong, prominently longitudinally ridged or keeled. 
2. T. pandacaqui 
3. Follicles, subglobose, not or obscurely ridged............ 3. T. subglobosa 
1. Leaves uniformly puberulent ....................2...:sessceceeeseeeeeeeseeee 4. T. puberula 
*1. T. DIVARICATA (L.) R. Br. (T. coronaria R. Br.). 
An erect, glabrous, much-branched shrub 2 to 3 m high, with abundant 
milky sap. Leaves opposite, those of each pair unequal, glossy, elliptic- 
ovate to elliptic-oblong, acuminate, 6 to 15 cm long. Peduncles axillary, 
solitary or in pairs, short, few-flowered. Flowers usually double, white, 
fragrant, the corolla-tube about 2 cm long, the limb spreading, about 5 
em in diameter, the center yellow. 
Occasional in cultivation, fl. more or less all the year. Original home 
unknown, but now cultivated in most tropical countries; of recent introduc- 
tion in the Philippines. 
2. T. pandacaqui Poir. Pandacaqui (Tag.). 
An erect, branched, glabrous shrub 1 to 4m high. Leaves elliptic-lan- 
ceolate to oblong-elliptic, narrowed at both ends, acuminate, 5 to 12 cm 
long, green, shining, short-petioled. Cymes axillary and terminal, pedun- 
cled, rather few-flowered. Calyx green, ovoid, short. Corolla white, the 
tube slender, about 1.7 em long, tinged with green, slightly enlarged up- 
ward, the limb 2 to 2.5 cm in diameter, of 5, spreading, falcate, lanceolate 
lobes. Follicles oblong, usually acuminate, longitudinally ridged or keeled, 
2 to 4 cm long, red or yellowish-red. (FI. Filip. p. 41.) 
In thickets etc., common, fl. all the year; widely distributed in the Phil- 
lippines. Endemic. 
8. T. subglobosa Merr. Pandacaqui (Tag.). 
A glabrous shrub 2 to 5 m high. Leaves oblong, 9 to 18 cm long, shortly 
blunt-acuminate. Cymes in the upper axils, 5 cm long or less, few-flowered. 
Flowers white, the tube about 1.4 cm. long, the lobes shorter. Follicles in 
pairs, ovoid to subglobose, red, fleshy, 4 cm long or less, not or but ob- 
securely keeled. (FI. Filip. pl. 283, T. globosa.) 
In thickets, Malate, rare, fl. in June and probably in other months; 
widely distributed in the Philippines. Endemic. 
4. T. puberula Merr. Pandacaqui (Tag.). 
A shrub about 2 m high. Leaves oblong to elliptic-ovate, acuminate, 
puberulent, 4 to 10 cm long. Cymes axillary, few-flowered. Flowers slen- 
der, white, about 1 cm long. Follicles red, ovoid to oblong, somewhat curved, 
ridged, acuminate, 1 to 2 cm long. 
In dry thickets near Fort McKinley, fl. May-June; known only from 
Rizal Province, Luzon. 
6. ALSTONIA R. Brown 
Trees with opposite or whorled leaves. Inflorescence of terminal or 
subterminal corymbose cymes. Calyx short, 5-lobed. Corolla salver-shaped, 
tube cylindric, the throat naked, annulate, or with reflexed hairs, the lobes 
short. Stamens inserted near the top of the tube, included, the anthers 
