The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California

American Rock Gardens

Those plants which are found to be not hardy should be supplanted by those which are more enduring. Not only are hay and manure certain to rot the plants, but they bring in weed seeds and harbor mice, which chew the plants. A few pieces of evergreen boughs may be laid on exposed spots, but a little coarse sand about the crowns is better. The rock plants really difficult of culture will be treated in Chapter VIII, for there are many rock plants which tax the skill of expert gardeners.

Lists

EVERY enthusiast wants lists of plants, and rock garden descriptions are full of them. So here are more, compiled with special reference to conditions of northeastern United States. All these plants are obtainable in the American trade or as seeds from abroad. These lists are not intended to be complete, but suggest a start for anygarden. The names marked with an * are native American plants. As suggestion for native rock plants, you are referred to the lists in "Horticulture"

1927-1928:
Nov. 1, 1927 — New England Rock Plants, p. 434.
Dec. 15, 1927 — From the North, p. 479.
Jan. 1, 1928 — From the Middle States, p. 19.
Jan. 15, 1928 — From Southern Alleghenies, p. 35.
Mar. 1, 1928 — From the Prairies and Plains, p. 115.
Apr. 15, 1928 — From Colorado and the Central Rocky Mountains, p. 200.
May 1, 1928 — From the Southern Rockies, p. 234.
June IS, 1928 — From the Northwest, p. 305.

A.—EVERGREEN FOLIAGE

For best effect all the year a good part of the rock plants should have evergreen foliage. These are really small shrubs but are usually classed as perennials. Even if they never bloom, the neat mats of foliage give interest the year through. There are more than two hundred species which are evergreen and hardy in the latitude of Boston—
Achillea clavennae, Silver Alpine Yarrow
—tomentosa, Woolly Yarrow Alyssum argenteum, Silver Alyssum
—gemonense, German Alyssum
—saxatile, Goldentuft
—spinosum, Spiny Alyssum Arabis albida, Wallcress
—aubrietioides, Aubrietia Wallcress Artemisia lanata, Alpine Wormwood
—glacialis, Glacier Wormwood Aubrietia deltoidea, Aubrietia
Dianthus alpinus, Alpine Pink
—arenarius, Sand Pink
—brevicaulis, Shortstem Pink
—caesius, Cheddar Pink
—neglectus, Smaller Ice Pink
—petraeus, Ledge Pink
—zonatus, Banded Pink, etc.
*Dryas octopetala, White Mountain Avens
—*drummondii, Drummond Mountain
Avens
—sundermannii, Sundennann Mountain
Avens