104 ALPINE PLANTS 
and purple flowers, all of which have silvery silky foliage. 
P. nepalensis, more frequently called P. formosa, is of 
free and easy growth, flowers rosy red, and borne with 
great profusion and continuity. There are many other 
Potentillas of merit, and with those already named as a 
nucleus, the reader may add to the number at will, and 
derive great pleasure from a collection of these handsome- 
foliaged and pretty-flowered plants. 
PRUNELLA.—Wherever a very easily grown plant is 
required to quickly cover a broad area of rock-work, and 
to bloom for several months, the prunellas lay claim to 
attention. Neat spikes of bloom are freely thrown up 
over a dense carpet of foliage, and one may have the 
choice of purple in P. grandiflora, violet in P. grandi- 
flora pyrenaica, white in P. laciniata, or rosy purple 
in P. webbiana, the last named being a particular showy 
variety. 
-PULMONARIA.—Just as easy to grow as the prunellas, 
provided they are given a spot where they will not be 
burnt by the full heat of the summer’s sun, the Pulmon- 
arias have a quiet and quaint beauty both in flower and 
leaf. The foliage of P. officinalis is spotted with white 
in a very conspicuous manner, P. saccharata being another 
species with prettily mottled leaves. The latter has rose- 
coloured flowers, those of officinalis being red, both show- 
ing some violet in the older blossoms There are white 
and bright red varieties of P. officinalis, and other desirable 
kinds are P. arvernense, deep blue, and P. angustifolia, 
the flowers of which are first pink, changing later to blue. 
Division of the roots is a simple matter, and with plenty 
