— 227 



The capsule often (always?) contains only one seed with 

 short woolly hairs and a hard shell. 



I have not examined the anatomy of the leaf. The primary 

 cortex of the branches is similar to that of the two species of 

 Convolvulus described above, as will be seen from fig. 53. 

 The inner cortex, as in these species, includes secreting cells 

 (fig. 53, A. 1.), which as seen in 

 longitudinal section stand in 

 long rows like piles of barrels, 

 (comp. Halher). Similar cells 

 are found in the pith which 

 also encloses leptome tissue 

 (a generic character). 



Convolvulus 

 fruticosus Pall. 



Grows on clayey or stony 

 soil. An undershrub with stiff, 

 spiny branches. The year- 

 shoots issuing from the low 

 knotted perennial parts are 

 branched once, twice or three 

 times. The branches, more 

 especially the ones of second- 

 ary order, are spread out or 

 bent backwards; the branches 

 of tertiary order and also the 

 upper ones of secondary order 

 are spines, of which the lower 

 ones bear flowers. Each bears 

 only one terminal flower with small foliage-like prophylls 

 each subtending a branch-spine which is generally leafless. 

 After the flower and the two leaves have fallen off, a fork- 

 shaped spine remains behind, (fig. 54 B, C). The upper thorns 

 are unbranched. 



The leaves are small and lanceolate; the lower ones are 

 the larger and may attain a length of about 2V2 centimetres, 

 while higher up they are shorter and narrower. In the 



15* 



Fig. 54. Convolvulus fruticosus. Upper 



(A) and middle part (B) of a shoot. 



C: Sclieme of branclied year-shoot. 



August. 



