ALPHABETICAL LIST OF PLANTS 325 



high. Flowers white and of a good size. The variety commutatum 

 grows as high as 7 feet, and is glabrous throughout. 



P. multijiorum. — The common "Solomon's Seal." Grows 2 to 4 

 feet high, with bright, glaucous green leaves and white flowers. 



P. officinale. — Only grows about 12 to 18 inches high, and is 

 otherwise similar to the last-named. 



P. oppositifolium. — Requires rather a sheltered spot. It has 

 arching stems 2 to 3 feet high, with bright, glossy green leaves. 

 Flowers white, marked with reddish lines and dots, and borne in 

 bunches, followed by red berries in the autumn. 



P. punctatum. — Angular, arching stems about 2 feet high. Hard, 

 leathery leaves, and white flowers with lilac dots. A handsome 

 plant. 



P. roseum. — Arching stems 2 to 3 feet high. Leaves in whorls, 

 and flowers rose-coloured, borne in pairs at the axils of the leaves. 

 Very pretty species. 



Polygonum (Polygonaceae) 



A very large genus, of which a few are suitable for planting in the 

 rock garden, and even those, with a couple of exceptions, not of the 

 highest value. They can all be propagated by division. 



P, affine. — Likes a moist, though well-drained position in loam. 

 It grows from 6 to 8 inches high, and has spikes of rosy flowers in 

 the autumn. It is a very pretty plant. 



P. Brunonis. — Similar to the above, with pale rose-coloured flowers, 

 borne in dense spikes, 12 to 18 inches high. 



P .sphaerostachyum. — Dwarf- growing, with spikes of deep crimson 

 flowers. Very handsome, and one of the best. 



P. vaccinifoliion. — Of neat, trailing habit and rapid growth. 

 Spikes of bright rose-coloured flowers in the summer and autumn. 

 A good plant for covering rocks or banks, and is not particular as 

 to aspect or soil. The best of the genus. 



P. viviparum. — Very dwarf habit, with spikes of creamy-white 

 flowers. Quite a pretty little plant, and not so encroaching as 

 many of the genus are. 



POTENTILLA (RoSACEAE) 



Of this large genus there are only a few that should find a place 

 in the rock garden, but amongst these few are some of the best plants 

 we have. Propagated by seed, cuttings, or division. 



P. a7nbigua. — Well-drained, open position in sandy soil. Dwarf 

 and creeping habit, only about 3 inches high, forming a compact 

 mass. Large, clear yellow flowers. Of moderate, though not 



