148 Rosacea—Potenti la. 
leaflets obovate, serrate, with a silvery tomentum beneath. 
Flowers 14 to 2 inches in diameter, dark crimson. A native 
of Nepal, blossoming from May to July. 
2. P. Nepalénsis of Hooker, not of Don (P. formosa of 
Don).— Very much like the foregoing, but with quinate radical 
leaves. There are several handsome varieties of these two 
species in cultivation, either of hybrid origin or from natural 
variation.  Russellidna, insignis, Menziésit, striata, and 
many others; some with double yellow and crimson flowers. 
There are many yellow and white flowered species. P. splén- 
dens, with silvery foliage, and P. Pyrendica, with yellow 
flowers; and P. rupéstris and P. diba, with white flowers, are 
amongst the best. P. fruticdsa is an indigenous shrub 2 to 4 
feet high with 3- to 5-foliolate leaves and yellow flowers. 
Trins V.—POTERIEA. 
Petals often absent. Carpels 1 to 3, included within calyx- 
tube. 
This tribe furnishes few ornamental species. The elegant 
plaited foliage of the Lady’s Mantle (Alchemilla) entitles it to 
a place in the mixed border; and some of the Burnets (San- 
guis6rba) have pretty pinnate foliage and dense spicate white, 
pink, or red flowers. 
Trisz VI.— ROSE. 
This tribe includes only one genus, as characterised below. 
8. ROSA, 
This favourite genus is distinguished as follows: Calyx 5- 
lobed; lobes simple or compound, inserted upon the top of a 
spherical or pear-shaped calycinal tube, generally considered 
as a mere dilatation of the flower-stalk ; corolla normally of 5 
petals alternating with the calyx-lobes, but very susceptible 
of duplification through the transformation of some or all of 
the stamens into petals; stamens indefinite in number, often 
exceeding a hundred, inserted around the circumference of the 
receptacle, within the petals; carpels more or less numerous, 
according to the species (5 to 60), uniovulate, inserted at the 
base and upon the walls of the calycinal tube, each with a 
