216 ROCK GARDENING FOR AMATEURS 



Coronilla. Of the Coronillas (which belong to the 

 Pea family, Leguminosae) only two or three are of value 

 for the rock garden. C. iberica (synonym C. cappadocica) 

 is perhaps the best ; it is a trailing plant with greyish 

 leaves and bearing yellow flowers in July. C. varia, 

 of rambling growth, produces blush-coloured blooms in 

 June. They need a sunny spot, and well-drained soil 

 consisting of loam, peat and sand. Propagation is 

 best effected by sowing seed in September or early spring. 



Corydalis (Fumitory) The Fumitories are members 

 of the natural order Fumariaceae, which includes the well- 

 known Bleeding Heart (Dicentra or Dielytra). They 

 have prettily cut leaves and curiously spurred yellow 

 blooms in May, and are suitable for old walls, for covering 

 mounds of soil, and for grouping in odd corners of the 

 rock garden, though not choice enough for the chief 

 positions. The commonest sort is Corydalis lutea (widely 

 distributed in Europe, and wild in Britain), with yellow 

 flowers ; nobilis, native of Siberia, is even finer, with 

 blooms of deeper yellow ; cheilanthifolia and thalictrifolia 

 are newer sorts, with the same pretty foliage and yellow 

 flowers. All those above named have fibrous roots. 

 The best method of increase is by seeds sown in spring, 

 or by division of the tufts in late summer. There are, 

 however, numerous tuberous-rooted kinds, not commonly 

 grown, of which the best are probably Scouleri, rose- 

 purple flowers in May, and tuberosa, the smallest of all 

 those described, growing not more than five or six inches 

 high, and bearing purplish blooms in March. The latter 



