II PRIMULACE^ 273 



quantity, by the base of tlie flower. The single species, 

 G. maritima, is widely spread in the temperate parts 

 of the northern hemisphere. 



Anagallis 



Creeping herbs. The flowers are homogamous and 

 without honey. The capsule opens transversely by a 

 circular fissure across the middle. Along the line of 

 dehiscence the cells are elongated transversely (Fig. 

 173, c), and are but slightly attached, while above and 

 below they present irregular outlines, which tend to 

 keep them together. We have two species : one 

 perennial, with a campanulate pale-pink corolla, A. 

 tenella ; the other annual, with a rotate deep-red, pink, 

 blue, or white corolla, A. arvensis. The seeds are dark 

 brown, biconvex, flattened on the dorsal aspect by 

 pressure against the wall of the pericarp, and covered 

 with obtuse, broad-based teeth, which give them the 

 appearance of being deeply pitted. 



A. arvensis. — The flower is open from about 9 a.m. to 

 3 P.M., and it is interesting from this point of view that 

 the only insect visitor yet 

 recorded (Halictus morio) 

 belongs to a genus which also 

 goes to rest early. When 

 the corolla closes, the stigma 

 would probably come in 

 contact with the anthers. 

 Moreover, the corolla drops 

 early, and in slipping over 

 the pistil can hardly fail to 

 dust the stigma with pollen. 

 The blue form, which, though 

 rarer with us, is equally 

 common in the South of ^'^°- ^^^.--jMsraMi, a™ms. Waii 



. „ • T 1 " ™^ capsule, c c, elongated cells 



Europe, is often considered, along the Une of dehiscence. 



as, for instance, by Bentham 



and Hooker, to be merely a variety. Clos, however, 



finds that the two are infertile together, in which 



T 



