Alstonia
(in honour of Dr. Alston, once Professor of Botany at Edinburgh). ORD. Apocynaceae. Usually tall, lactescent, or milk-bearing stove evergreen shrubs or trees, with small white flowers, which are disposed in terminal cymes. Leaves entire, opposite or often whorled. Of easy culture, thriving best in a mixture of peat, loam, and sand. Cuttings root readily in sand, in heat. Besides the one mentioned, there are eleven other species. A. scholaris (school). fl., corolla salver-shaped, white; cymes on short peduncles. March to May. l. five to seven in a whorl, obovate-oblong, obtuse, ribbed; upper surface glossy, under white, and having the veins approximating the margin. h. 8ft. India, 1803. SYN. Echites scholaris.