HARDY PLANTS, 
201 
species, namely, P. capitatum, pink, 4m. ; and P. orientale, 
rosy-purple, 3ft. The former is suitable for rockery and the 
latter for border culture. Sow seeds in April where required 
to grow. 
Potentilla (Cinquefoil). — Hardy perennials of a showy 
character, and members of the Rose order (Rosaceae). The 
most showy plants of this genus are the lovely double-flowered 
forms obtained by crossing P. argyrophylla atrosanguinea with 
varieties of P. nepalensis. These grow about i8in. to 2ft. 
high, and bear double flowers of many rich shades of colour 
throughout the summer and autumn months. They are 
specially adapted for massing in beds or in sunny borders, 
and require a rich, well-drained soil. Plant in autumn or 
spring. The following is a good representative dozen varie- 
ties. For a larger selection see trade lists : Congo, maroon- 
crimson ; Fantasie, scarlet, edged gold; Mont d’Or, canary- 
yellow ; Mordoree, crimson, shaded gold ; William Rollison, 
scarlet, shaded orange-yellow ; Toussaint l’Ouverture, velvety 
crimson ; Melpomene, yellow, shaded orange-scarlet ; Pano- 
rama, yellow, striped purple ; Vulcan, deep crimson ; Feu 
Follet, orange-scarlet, orange margin; Don Quixote, yellow, 
splashed scarlet ; Marron d’lnde, maroon and yellow ; Dyck, 
yellow, striped red. With regard to the species, the following 
are worthy of culture on sunny rockeries or the margins of 
borders : P. alba, white, single, spring and summer, 6in., 
Alps; P. alchemilloides, white, single, summer, 3m., Pyrenees; 
P. alpestris, golden-yellow, summer, 6in., Britain ; P. ambigua, 
yellow, sing'e, June, 6in., Himalayas; P. argyrophylla atro- 
sanguinea, single, crimson, summer, ift. ; P. hopwoodiana, 
salmon-apricot and rose, single, hybrid, June, i8in. ; P. nepal- 
ensis, cherry, single, summer, i8in., Nepaul ; P. recta, yellow, 
single, summer, iSin., Europe; P. reptans fl. pi., golden- 
yellow, double, summer, 6in. ; P. rupestris, white, single, 
summer, i8in., S. Europe; and P. fruticosa, yellow, June, 
2 to 4ft., a native shrub. The foregoing species will thrive 
in good ordinary, well-drained soil. Plant in autumn or 
spring. Increased by seeds sown in sandy soil in a cold frame 
in spring ; also by division in autumn or spring. 
Pratia. — The Pratias are dwarf trailing perennials, be- 
longing to the Harebell order (Campanulaceae). The only 
species worthy of note here is P. angulata (Syn. Lobelia littor- 
alis), a native of New Zealand. It grows about 2in. high, 
trails along the surface, and bears white lobelia-like flowers 
in summer, followed by violet-coloured berries. It requires 
to be grown in good ordinary soil on a sunny rockery, where 
its shoots can creep over stones. Plant in spring. Increased 
by division and seeds. 
