330 List of Shrubs 
This genus furnishes one excellent ornamental shrub, a dwarf, 
indigenous to the northern temperate zone and found in the turfy 
hillocks of northern bogs, from Newfoundland to Alaska and south. 
A. polifolia Linn. (1), Wald Rosemary, rarely over twelve to fifteen 
inches in height, with very fine, linear leaves, dark green above and 
white beneath, and tiny, delicate white to pink flowers in nodding 
clusters (spring). Most suitable for borders. 
A. arborea (2), see Oxydendron, Tree List C. 
Azalea. A genus with a large number of species and varieties and 
endless hybrids, native, from the Mediterranean and from Asia; many 
only fit for hot-house use; prized for their wealth of early, variously 
colored, beautiful flowers (April to July). All but one are deciduous, 
very shade-enduring, hence fit for under-shrubs, but they thrive also in 
sunny and moist places (ravines and borders). Various sizes can be 
had. For remarks regarding their treatment, see under Rhododendron, 
Three or four native species and two or three exotics, from which many 
varieties are derived, are adapted for outdoor use. For best effects, 
rich soil is desirable, ample moisture, and partial shade. 
* A. arborescens Lursh. (3), the native Tree Azalea, from Pennsyl- 
vania to North Carolina, is the largest of the family (twelve to twenty 
feet), with less brilliant (white to reddish) flowers than the others, the 
latest in blooming. It is the easiest to cultivate in any situation. It 
fits well in the center of a group of its congeners. 
* A. calendulacea Michx. (4) (lutea), the Flame Azalea, native of 
the Atlantic Coast, is next in size (six to fifteen feet), and one of the 
most showy, with a profusion, of yellow to scarlet or orange-red flowers 
(May, June), which justify its name. 
A. Canadensis Ktze. (5) (Rhodora), is probably the hardiest, being 
native from Newfoundland south, a low shrub (one to two feet), with 
glaucous foliage and early, rose-purple flowers in variegated shades, 
appearing before the leaves. No success in Ottawa. 
A. nudifiora Linn. (6), the native, common Wood Honeysuckle, or 
Pinter, from Maine to Texas, grows to a height of six feet or more, 
with pink flowers appearing in profusion before and with the leaves, in 
May, and is perhaps the most adaptive; hardy into Canada. 
A. Vaseyi Rehder. (7), from the mountains of North Carolina, only 
lately introduced into gardens; in cultivation may attain a height of 
four to six feet. It excels in its delicate pink or rose-colored flowers, 
* Stars denote the most desirable forms. 
