Yucca.--This plant, popularly known as Adam's Needle thrives best in dry, sandy loam. It is quite hardy, and does well on rock-work, to which it imparts a tropical aspect, Yucca Recurva has fine drooping leaves, and is suitable for vases, etc. It bears a white flower. Yuccas are mostly evergreen shrubs, are very beautiful, and have the habit of palm-trees. A light, rich soil suits them all. They are increased by suckers from the root. They make handsome plants for lawns, terraces, ornamental vases, the centre of beds, or sub-tropical gardens, and bloom in September. Height, 2 ft. Z Zauschneria.--A Californian half-hardy perennial plant which bears a profusion of scarlet tube-shaped flowers from June to October. It grows freely in a sunny position in any dry, light, gravelly, rich soil, and is increased by division of roots or by cuttings. Height, 1 ft. Zea (_Indian Corn_).--This is best raised in a hotbed early in spring, but it will germinate in ordinary soil in May. It requires a sunny situation. Height, 2 ft. to 3 ft. Zea Japonica Variegata (_Striped Japanese Maize_).--A fine half-hardy annual ornamental grass, the foliage being striped green and white, and growing to the height of 3 ft. The cultivation is the same as the foregoing. Zephyranthes (_Swamp Lilies_).--Plant on a warm border in a rather sandy, well-drained soil. Give protection in severe weather, and supply with water during the growing season. Take up and divide every second or third year. The flowers are produced in July. Height, 9 in. Zinnia.--A genus of very pretty annuals, well deserving of cultivation. The seeds must be raised on a gentle hotbed in spring, and planted out in June 1 ft. apart in the richest of loamy soil and warmest and most sheltered position. Height 1 ft. to 11/2 ft. End of Project Gutenberg's Gardening for the Million, by Alfred Pink