CHOICE PLANTS FOR ROCK GARDENS 175 
foliage is glaucous and elegant. It blooms amid the 
showers of early April and continues in bloom until the 
height of summer. R. montanus, although but a few 
inches high, produces quite large flowers of richest yellow, 
and there is a variety of this species named geranifolius 
that has foliage finely lacerated and of almost fern-like 
elegance. R. alpestris is a delightful little gem with pure 
white flowers, but its variety Traunfellneri is smaller still, 
sometimes flowering at less than an inch from the soil. 
I must not, however, attempt to name and describe all 
the buttercups that are worthya place among our alpines, 
but with these few to start with the readers may always 
find descriptions of others in catalogues which will guide 
him in the selection of additional varieties. 
SANGUINARIA CANADENSIS.—This is a plant of uncom- 
mon appearance and quaint character, but is extremely 
beautiful, and it surprises me that one does not frequently 
see a good clump of it in rock gardens. Its roots are 
tuberous, fleshy, and brittle. The flowers, which appear 
in early spring, in advance of the leaves, are like glistening 
white anemones of considerable size. When the leaves 
appear they are beautifully glaucous, and are prettily 
cut at the edges, somewhat after the style of the foliage 
of Bocconia cordata. The plant is eminently suitable for 
pan culture for the alpine house. Propagation may be best 
effected by division of the tuberous roots immediately after 
flowering. A form named major is of much larger propor- 
tions than the type, and an exceedingly beautiful plant. 
SAPONARIA.—The ‘‘ Soapworts ”’ include several varieties 
that are suitable for rock gardening, S. ocymoides being 
