354 List of Shrubs 
Philadelphus. Mock Orange, misnamed Syringa and Jasmine, a 
genus with some thirty species and a large number of varieties and 
hybrids of tall to medium-sized shrubs, from Europe, Asia, and native; 
hardy and easily propagated, vigorous growers, and apt to assume 
rather coarse form, with broad, ornamental foliage and medium to large 
flowers. For best form and flowering, severe cutting back after flo wer- 
ing is essential, the flowers forming on the wood of last year. They are 
adaptive and shade-enduring. 
P. coronarius Linn. (131), from southern Europe, a shrub of twelve 
to fifteen feet, of upright habit, with creamy-white, strongly fragrant 
(objectionable to some), medium to large, orange-like flowers (May), 
in racemes, and sharply-pointed, bright green foliage. Varieties with 
double flowers and variegated foliage, and of lower stature, exist; the 
species is, however, best used for border planting. 
P. Gordontanus Lindl. (132), a native of our northwest, with scent- 
less flowers in racemes, blooms in July. 
P. inodorus Linn. (grandiflorus) (133), of southern habitat, hence 
not quite hardy, has round leaves and much larger, scentless flowers 
(May). 
P. microphylius Gray (134), from the Rocky Mountains, is a dwarf, 
with slender, rigid branches, dense foliage of small leaves, and large 
terminal, very fragrant flowers in threes. It is adapted for sunny, 
dry sites, and excellent for rock gardens. 
STORAX FAMILY 
This family with small, open, bell-like, delicate flowers, as a rule 
white, blooming early, contains seven genera, consisting mostly of 
tropical species, three of which, however, furnish ornamental values for 
northern use. 
Halesia (Mohrodendron). Snowdrop or Silver Bell Tree. Is a genus 
of six or eight species, of which two are native through the South, in 
nature growing into tree form. These are among the finest ornaments, 
with their profusion of early clusters of delicate white, ‘‘silver-bell”’ 
flowers two to four in a cluster, on long stalks, appearing with the 
foliage; and their graceful form, with many long, slender branches, and 
with rather large, light green foliage, making a pleasing round bush, 
which is best used singly. They are adaptive to soils, prefer shade, 
and are easily handled, but are only half hardy north of Philadelphia. 
