378 



PRACTICAL GUIDE TO GABDEN PLANTS potentilla 



P. argentea. — A slender - growing 

 species 6-12 in. high, native of the dry 

 mountainous regions of Europe, Asia 

 Minor, Siberia, and N. America. The 

 leaves are composed of 5 obovate leaflets, 

 greyish-green above, silvery-white beneath. 

 The small yellow flowers are borne in a 

 terminal panicle from June to September. 



There are several forms of this species, 

 and a hybrid between it and P. verna also 

 exists. P. coUina, a native of Bohemia, is 

 closely related. 



Culture dc. as above, p. 376. 



P. argyrophylla (P. insignia). — A 

 pretty Himalayan species 1^3 ft. high, 

 with silky, silvery, sharp-toothed leaves. 

 Flowers in summer, yellow, over 1 in. 

 across. The variety atrosanguinea has 

 beautiful dark crimson flowers, and there 

 is also a fine double-flowered form of it 

 from which most of the garden forms are 

 derived. 



Culture dc. as above, p. 376. 



P. aurea. — A very dwarf tufted species 

 scarcely more than 1-2 in. high. It is a 

 native of the European mountain ranges 

 at elevations of 3000 to 6000 ft. The 

 palmate leaves have 5 oblong lobes edged 

 with silky silvery hairs. The large 

 golden-yellow flowers, spotted with orange 

 at the base of each petal, are borne in 

 loose panicles from May to July. 



P. haldensis from the Tyrolese Alps 

 is closely related, but may be distinguished 

 by its denser habit, smaller and more 

 numerous yellow flowers, and hairy 

 leaves. 



Culture (fc. as above. Suitable for 

 the rock garden, or for making a carpet 

 in the flower border, in open sunny situa- 

 tions in sandy soil, with a, little peat or 

 leaf-mould added. 



P. bifurca. — A Caucasian species in 

 the way of P. anserina, having thread- 

 like rooting runners, and pinnate leaves 

 composed of 3-7 pairs of oblong very 

 downy leaflets. The bright yellow flowers 

 are borne on an erect panicle 9-12 in. 

 high from May to July. 



Culture rfc. as above, p. 376. 



P. Calabra. — A native of S. Europe, 

 with very silvery 5-lobed leaves, and 

 lemon-yellow flowers about f in. across, 

 produced in early summer. This is closely 

 related to P. argentea, and is practically 

 only a form of it. 



Culture i(-c. as above, p. 376. 



P. canescens. — An erect-growing per- 

 ennial 1-2 ft. high, native of the European 

 mountain ranges. The grey-green leaves 

 are composed of 5-9 leaflets, and are 

 covered with a silvery down on the under 

 surface. The yellow flowers are borne in 

 broad clusters from May to July. 



Culture do. as above, p. 376. 



P. caulescens. — A pretty species, 

 native of the Alps, Apennines, Pyrenees 

 &c., with leafy stems 6-9 in. long. The 

 lower leaves are composed of 5 leaflets, 

 the under surface and the margins of 

 which are furnished with silky hairs. 

 The white flowers appear in great profu- 

 sion firom June to August. 



Culture dc. a,B above. Asunny crcs-ice 

 in the rockwork or in stony well-drained 

 soil suits this species best. 



P. chrysantha. — A native of the moim- 

 tains of Central Europe, 1-2 ft. high, with 

 downy leaves composed of 5-7 pairs of 

 oblong toothed leaflets. The light yellow 

 flowers are borne on a large panicle from 

 May to August. 



Cjilture do. as above, p. 376. 



P. cinerea. — A dwarf creeping species, 

 native of the mountains of S. Europe and 

 Asia Minor. The leaves are covered with 

 a whitish down, and are composed of 4-5 

 thick leathery leaflets. The small bright 

 yellow flowers are produced with great 

 freedom from May to August. 



Culture dc. as above, p. 376. 



P. clusiana. — A small species 2-3 in. 

 high, native of the chalky rocks of the 

 Tyrol and Carpathian Mountains at an 

 elevation of 3000-6000 ft. The 3-5 

 oblong leaflets which compose the leaves 

 are covered with silky down, and the 

 white flowers appear in May and June, 

 2 or 3 together at the top of the leafy 

 stems. 



Culture dc. as above, p. 376. 



P. congesta (Horhelia congesta). — A 

 Californian species 1-2 ft, high, with 

 wedge-shaped oblong leaflets cut at the 

 apex. Flowers in August, white, crowded 

 on the stalks. 



Culture dc. as above, p. 376. 



P. delphinensis. — A dwai-f tufted 

 species 9-18 m. high, with digitate leaves 

 made up of 5-7 lobes, green on both sides. 

 The numerous bright yellow flowers aj-e 

 borne in summer, closely arranged on the 

 panicle. 



Culture dc. as above, p. 376. 



