Flora of the Malayan Peninsula. 435 



Subtribe 3. — Euplumeriin^. 

 11. Alstonia, Br. 



Trees or erect shrubs ; branches often in whorls. Leaves usually 

 whorled, rarely opposite, frequently with numerous nearly horizontal 

 nerves ; stipules sometimes represented by glands or a ridge between 

 the leaf-petioles. Inflorescences of terminal or pseudo-terminal corym- 

 bose or umbelliform cymes, sometimes verticillate on the rachises. 

 Calyx-t\xhe short, sometimes urceolate, sometimes almost none ; lobes 

 5, short, eglandular. Corolla hypocrateriform ; tube cylindric, dilated 

 opposite the stamens, usually at the top, the throat naked, annulate 

 or with reflexed hairs ; lobes overlapping either to the right or 

 left. Stamens usually at the top of the tube, sometimes lower, 

 included ; anthers free, usually lanceolate ; filaments short, filiform. 

 Disk none, or annular or lobed ; the lobes 2 alternate with the 

 carpels. Carjpels 2, distinct ; style filiform ; stigma oblong or cylindric, 

 usually bifid at apex ; ovules in each cell many, pluriseriate. Fruit of 

 2 follicular mericarps, usually long, cylindric, slender. Seeds oblong, 

 compressed, peltate on flattened tough placentas, ciliate and usually 

 with tufts of long hairs at the ends ; testa membranous, often papillose ; 

 albumen fleshy, rather scanty ; cotyledons oblong, flat ; radicle about 

 as long as the cotyledons, superior.— Disteib. Species about 30 ; 

 found in India, Malaya, tropical Australia and Polynesia, one in 

 tropical Africa. 



Leaves with close parallel nerves, apex usually obtuse ; corolla- 

 lobes overlapping to the left ; follicles over 6 in. long, 

 equally broad throughout ; seeds rounded at both ends (Sub- 

 genus I. Pala) : — ■ 



Ovary villous ; corolla-tube pubescent without ; leaves 3 to 



7 in. long .. .. .. .. ..1. A. scholaris. 



Ovary glabrous ; corolla-tube glabrous without : — 



Corolla-tube rather broad ; follicles glabrous ; leaves 2 to 



4 in. long .. ,. .. .. ..2. A, spathulata. 



Corolla-tube slender ; follicles pubescent ; leaves 2-o to 



5 in. long .. .. .. .. .. S. A, angustiloba. 



Leaves with close parallel nerves, apex usually acute ; corolla- 

 lobes overlapping to the left ; follicles under 6 in. long, 



broadest in the middle ; seeds oblong, dentate at the ends 



(Subgenus II. Blaberopus) . . . . ,, 4. A. Gurtisii. 



Leaves with distant more or less parallel nerves ; corolla-lobes 



overlapping to the right ; follicles long, slender, equally broad 



throughout ; seeds acute or acuminate at one end, rounded at 



the other (Subgenus III. Dissukaspekmum) : — • 



Stamens inserted at the top of the corolla-tube, which is 



4 



