Edmund C. Snodgrass, Lucie L. Snodgrass Green roofs have gone from horticultural curiosity to booming growth industry in urban and suburban settings alike-primarily because their environmental benefits are now beyond dispute. Concise, accurate, and easy to use, this is the first reference devoted to the drought-tolerant plants most likely to succeed, covering moisture needs, heat tolerance, hardiness, bloom color, foliage characteristics, and height of 200 species and cultivars.