Convolvulacetz Convolvulus. 317 



flowers. The centre of the flower is yellow, followed by a 

 white band, and is bordered with deep blue in the common 

 variety ; but there are several garden varieties variously striped 

 with some or all of the above colours, and others in which 

 violet enters. There is also a double-flowered variety. 



C. althceoldes is a twining perennial species from the South of 

 Europe, with silvery lobed or dissected leaves and delicate rose- 

 coloured flowers borne in pairs. C. pubescens, syn. Galystegia 

 pubescens, is another twining species with hastate downy leaves 

 and large flesh-coloured flowers. The variety in cultivation 

 lias very double flowers and is very showy, but hardly suitable 

 for planting in a border on account of its running roots. It is 

 reported to come from China. C. Dahurica has cordate leaves 

 and handsome deep rose-coloured flowers. The species formerly 

 referred to Calystegia have two large bafy bracts overlapping 

 the calyx. 



2. PHARBlTIS. 



The species included under this name differ but slightly 



Fig. 178. Pharbitis hlspida. (J nat. size.) 



from the true Convolvuli. They are distinguished by having 

 the stigma capitate or lobed, not divided into slender arms, and 



