210 ALPINE FLOWERS AND ROCK GARDENS. 



stems bearing white flowers in spring. The specific 

 name comes from the division ot the leaves into three 

 and the popular one from the yellow roots. It is a 

 great lover of moisture, and may be planted in peaty 

 soil in the bog or marsh garden. It is propagated by 

 division between autumn and spring, or by seeds 

 sown in spring. There are several other species, but 

 the only one that need be considered is occidentalism 

 which produces white flowers in May. It is taller than 

 trifoliata. They should have a sheltered place. 



corns MONSPELIENSIS.—A pretty but not 

 largely grown Primulaceous plant, bearing Hlac flowers 

 with orange anthers in June. It enjoys a warm, sunny 

 spot, and sandy, well-drained soil. It may be raised 

 from seed under glass in spring, and is best treated as 

 a biennial, being sown afresh every year. 



CORONILLA IBERICA (Iberian Crown Vetch). 

 — ^This is the most popular rockery species of a rather 

 large genus. It is now called cappadocica by the 

 botanists, but is generally listed as iherica. It is of 

 trailing habit, and is therefore suitable for the rock 

 garden. It bears yellow flowers in umbels in July. 

 The foliage is glaucous. It will interest lovers of the 

 Pea family. It is not safe in an exposed place. It 

 likes a good loamy soil, the more if a little peat is added. 

 Propagation is by seed. C. varia, with rosy flowers, 

 is also grown, but this is a stronger plant, not suited 

 for small rockeries. 



CORTUSA. — A small genus of Primulaceous plants, 

 of which two species are offered in the catalogues : 

 Matthioli and pubens. The former bears crimson 



