UMBELLIFER^E 123 



indehiscent carpels (mericarps) separated by a commis- 

 sure, and each containing a single seed ; the pericarp often 

 deeply furrowed and furnished with vittae or oil-glands; 

 leaves almost always deeply and compoundly divided, and 

 with dilated leaf-stalk enclosing the stem. A very large 

 order, belonging chiefly to the cooler parts of the Northern 

 and Western Hemisphere ; but there are comparatively few 

 alpine species. Owing to the many characters which are 

 >mmon to the whole order, the distinctions between the 

 ;nera and species often depend on minute points. 



Tribe HYDROCOTYLE^:. Umbels simple or flowers 

 jry few ; fruit compressed laterally ; commissure narrow ; 

 rittae o or obscure. 



i. HYDROCOTYLE, L. 



Flowers small, very few; leaves entire or only lobed. 

 Not alpine. 



H. vulgaris, L., Pennywort; with orbicular peltate 

 leaves and minute pinkish-green flowers; marshes and 

 bogs. 



Tribe SANICULE^E. Umbels simple or very irregularly 

 compound ; fruit subterete or compressed dorsally ; com- 

 missure broad ; vittae o or obscure. Genera 2-5. 



2. SANICULA, L. 



Umbels small, crowded, nearly globular, with both 

 general and partial involucre; calyx -teeth as long as 

 petals ; petals minute, deeply notched, with long inflexed 



