AMBROSINIA (commemorative of Professor Giacinti Ambrosini, of Bologna). ORD. Aroideae (Araceae). A curious, half-hardy, tuberous perennial, thriving in any light soil, with protection in winter. Increased by seeds, and by divisions. The former should be sown, as soon as ripe, in a cool house; and the latter should be made just previous to new growth in spring. AMBROSINIA Bassii (Bass's).* fl., spathes prolonged into a long tail, and a tongue-shaped spadix, with the male flowers on one side, and so placed as to preclude the access of pollen to the stigma on the other side of the spathe, save by insect agency. l. oblong, stalked h. 4in. Corsica, Sardinia, 1879.