A. Very hardy.

B. Requires a sheltered position.

C. Requires protection until well established.

D. Rapid in growth.

E. Slow in growth.

F. Prefers a moist soil.

G. Thrives in any good soil.

H. Thrives best in a light warm soil.

J. Particularly good for cutting.

S. Shrub, or generally grown in bush-form.

T. Tree or generally grown in tree-form.

X. (Found in Rose-List.) Indicates best flowering varieties.

Y. (Found in Lilacs.) Indicates largest and best blooms.