VI. SOLANACEAE, PRIMULACEAE, POLYGONEAE, ETC.

Petunia violacea, crossed and self-fertilised plants compared for four generations.—Effects of a cross with a fresh stock.—Uniform colour of the flowers on the self-fertilised plants of the fourth generation.—Nicotiana tabacum, crossed and self-fertilised plants of equal height.—Great effects of a cross with a distinct sub-variety on the height, but not on the fertility, of the offspring.—Cyclamen persicum, crossed seedlings greatly superior to the self-fertilised.—Anagallis collina.—Primula veris.—Equal-styled variety of Primula veris, fertility of, greatly increased by a cross with a fresh stock.—Fagopyrum esculentum.—Beta vulgaris.—Canna warscewiczi, crossed and self-fertilised plants of equal height.—Zea mays.—Phalaris canariensis.