Rosacece Rubus. 147 



neath. Flowers very large, purplish rose. Fruit orange-red. 

 This is a very showy plant, from North America. 



4. R. spectdbilis. An unarmed or spiny shrub about 6 feet 

 high. Leaves dense, ternate or trilobate; leaflets or lobes 

 serrulate. Flowers bright red, axillary, solitary, on long 

 pendulous peduncles. P'ruit orange-red. Native of North- 

 western America. 



5. R. ctrcticus. This is an interesting little species about 

 6 inches high, with trifoliolate leaves and deep red flowers. 

 Arctic regions. 



TRIBE IV.POTENT1LLEJE. 



Calyx persistent, bracteolate. Carpels usually numerous, 

 with one ascending seed in each. 



6. G^UM. 



Perennial herbs with tufted pinnate radical leaves, the 

 terminal lobe very large. These plants differ from the 

 Potentillas in their pinnate leaves and elongated styles after 

 flowering. About thirty species, from temperate regions of 

 both hemispheres. Name from ysva), to stimulate, from the 

 aromatic roots. 



1. G. Chiloense, syn. G. coccineum of Lindley. An erect 

 branching herb about 2 feet high. Flowers in terminal leafy- 

 branched loose panicles about 1^ inch in diameter. There 

 are two varieties, one with bright scarlet, and the other with 

 dark crimson flowers ; both of them very pretty where there is 

 plenty of space. Native of Chiloe. 



7. POTENTlLLA. 



Herbs or rarely shrubs, those in general cultivation with 

 digitate leaves. Stipules adnate to the petiole. Flowers 

 showy, white, yellow, crimson, or scarlet. Calyx with 5 or 4 

 bracteoles, and as many sepals, valvate in bud. Petals of the 

 same number. Stamens many. Styles not elongating after 

 flowering. About 120 species, nearly all within the north 

 temperate zone, a few on the mountains of the tropics, and 

 two in the south. So named from potens, powerful, effective, 

 from their reputed medicinal properties. 



1. P. atrosanguinea. A hairy branching herbaceous plant 

 about 2 feet high with petiolate digitately trifoliolate leaves ; 



L 2 



