148 Rosacecz Potentilla. 



leaflets obovate, serrate, with a silvery tomentum beneath. 

 Flowers \\ to 2 inches in diameter, dark crimson. A native 

 of Nepal, blossoming from May to July. 



2. P. Nepalensis 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. Russelliana, insignis, Menziesii, striata^ and 

 many others ; some with double yellow and crimson flowers. 



There are many yellow and white flowered species. P. splen- 

 densy with silvery foliage, and P. Pyrenaica, with yellow 

 flowers ; and P. rupestris and P. alba, with white flowers, are 

 amongst the best. P. fruticosa is an indigenous shrub 2 to 4 

 feet high with 3- to 5-foliolate leaves and yellow flowers. 



TRIBE V.POTEEIE^E. 



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 (Alchemilld) entitles it to 

 a place in the mixed border ; and some of the Burnets (San- 

 guisorbd) have pretty pinnate foliage and dense spicate white, 

 pink, or red flowers. 



TRIBE VLROSE^. 

 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 



