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UMBELLIFEILE. 



1. HYDROCOTYL^ (White-rot). 



1. H. vulgdris (Common White-rot, Marsh Penny- 

 wort). The only British species ; common in marshes 

 and bogs. A small creeping plant, -very unlike the rest 

 of the umbelliferous tribe, with round, smooth, crenate 

 leaves, 1 1^ inch across, and inconspicuous heads of 

 about 5, minute, reddish-white flowers, which never rise 

 above the leaves, and require a close search to be de- 

 tected at all. Each leaf is attached by its centre to the 

 stalk, and resembles a little platter. Fl. May, June. 

 Perennial. 



