Ten of the most popular rock plants: Baby's Breath, Gypsophila re pens. Bluebells, Campanula rotundifolia. Columbine, Common, Aquilegia Canadensis. Daphne Cneorum. Foxglove, Digitalis purpurea. Gas-plant, Dtctamnus albus. Golden-tuft, Alyssum saxatile. Moss-pink, Phlox subulata. Poppy, Iceland, Papaver nudicaule. Saxtfraga crassifolia.

Four rock plants, annuals: Clarkia elegans.

Daisy, Swan River, Brachycome iberidifolia. Gilia micrantha. Linaria alpina.

Four rock plants, herbaceous perennials: Harebell, Carpathian, Campanula carpatica. Lamp Flower, Lychnis Alpina. Poppy, Alpine, Papaver Alpinum. Rock-cress, Aubrietta deltoidea.

Four shrubby rock plants:

Barberry, Creeping, Berberis repens. Crowberry, Empetrum nigrum. Daphne Cneorum. Laurel, Mountain, Kalmia latifolia.

Four rock plants that bloom in April 0n earlier: Anemone blanda.

Bluebells, Mertensia pulmonarioides. Daphne Cneorum. Whitlow-grass, Draba Alpina.

Four rock plants that bloom in May: Rock-cress, Arabis albida. Moss-pink, Phlox subulata. Alpine Anemone, Anemone Alpina. Stellaria graminea.

Four rock plants that bloom in June: Bunchberry, Cornus Canadensis. Columbine, Alpine, Aquilegia Alpina. Easter Bell, Stellaria Holostea. Rock-cress, Aubrietia deltoidea.

Four rock plants that bloom in July: Blazing-star, Liatris spicata. Catchny, German, Lichnis Viscaria. Lobelia syphilitica. Stonecrop, Sedum acre.

Four rock plants that bloom in August: Anemone Japonica. Poppy, Iceland, Papaver nudicoule. Sedum ternatum. Spraguea umbellata.

Pour rock plants that bloom in September: Alder, White, Clethra alnifolia. Anemone Japonica. Cardinal Flower, Lobelia cardinalis. Sedum, Showy, Sedum spectabile.

Four rock plants that bloom in October or later: Goldentuft, Alyssum saxatile. Poppy, Iceland, Papaver nudicaule. Poppy-mallow, Cauirhoe involucrata Sedum, Showy, Sedum spectabile.