Alyssum argenteum (syn. rostratum) has fiat clusters of Alyssum 
small yellow flowers and in July is a mass of bloom eighteen Argenteum 
inches high. (I) 
A. saxatilis compactum. with heavy grey, leaves, has golden 
flowers in April and is indispensable. Other Alyssums are also 
good. 
Androsace sarmentosa and its varieties form tiny tufts of Androsace 
silvery rosettes, from the center of which Verbena-like clusters sarmentosa 
of pink flowers on three inch stems appear in April. Later these 
plants throw runners on the tips of which is a new rosette, form- 
ing roots where it touches the ground. (II) 
A. lanuginosa form loose mats of silvery-grey shoots with 
low Verbena-like pink clusters, blooming in September. (II) 
Aquilegia canadensis is orange and scarlet. 
A. coerulea, exquisite blue and white. 
Aquilegia 
canadensis 
Arabis alpina has white flowers in March or April, 8 inches Arabis 
high, mat of grey leaves; one of the earliest. (I) alpina 
A. alpina fl. pi. Double white flowers in April and May more 
effective than the above and lasting longer in flower. 
Armeria maritima. Thrift. Close tufts of grass-like foliage Armerii 
from which appear in May round clusters of pale pink flowers maritima 
six inches high. There is a variety alba, and splendens has 
brilliant pink flowers. 
Aster alpinis. A fine lavender (also white) Daisy with Aster 
yellow center; blooms in April; 6 inches high. Leaves in tufts, alpinis 
A. alpinis specious. Blooms two weeks later; 10 inches high. 
A. sub-coerideus. Blooms two weeks later than specious. 
18 inches high. 
Aubrietia Hybrids in shades of lavender and purple (avoid Aubrietia 
those tending to pink) are indispensable plants forming close 
mats of small grey leaves. A mass of color when in flower and 
lasting long in bloom. Plant with sufficient drainage. A north 
wall is a good exposure. 
Campanula carpatica forms ten-inch mounds of green leaves ; 
in July covered with large cup-shaped flowers in shades of blue 
and white. Its named varieties are also good. 
C. garganica has star-shaped flowers in sprays rising from the 
tuft of pointed heart-shaped leaves. (II) Its varieties are 
excellent. C. W. G. Paine larger and deeper in color. (II) 
C. hirsuta, a hairv-leaved variety, flowers of a clear true 
blue. (II) 
C. Port ens chlagiana (syn. muralis) is indispensable for all 
rock gardens, large or small. It has good neat tufts of smooth 
leaves, with upright purple bells in sprays four to six inches high. 
Campanula 
carpatica 
41 
