198 



FLOWERS OF THE SEA-COAST 



and the pink corolla is marked with longitudinal yellowish or red 

 streaks. The capsule is large. 



Seaside Bindweed is at most I ft. high. It is usually in flower in 

 June and July, and is a perennial plant, which is increased very freely 

 by division of the roots. 



The flowers are complete and the plant is gynodioecious. The 

 flowers are as in C. arvensis, but they possess two bracts enclosing the 

 calyx, and the stigma is broad. The stamens and pistil vary in length. 



SEASIDE BINDWEED (Calystegia Soldanella, Br.) 



Being a maritime plant it is not visited to any extent by insects. In 

 C. arvensis, which is pollinated like the Seaside Bindweed, the flowers 

 are scented, opening between 7 a.m. and 10 p.m., closing at night and 

 during rain. There is honey at the base of the tube. The stamens 

 lie close to the tube and have enlarged bases. At their edge the 

 anther-stalks are interwoven by stiff projections. The anthers open 

 outwards and lie below the stigmas, which an insect touches first. 

 The corolla may have a red band, the flower may be small, and there 

 may be a pistillate type with short stamens and undeveloped anthers. 

 The capsule splits open when ripe, and is filled with black seeds, 

 which are dispersed around the parent plant being aided partly by the 

 wind. 



