UMBELLIFERE. 43 



OKDER XXXVIII. UMBELLIFER.E. (UMBELLIFEROUS OR 

 HEMLOCK TRIBE.) 



HYDROCOTYLE. ( White-rot.) 



I. H. vulgaris. L. (Common White-rot, or Marsh 

 Pennywort.) 



Bogs and marshes. 5-8. 



Frequent at Harrow Weald and Ruislip Commons ; 

 also in the wet ground round Ruislip Reservoir. Stan- 

 more Heath. (Flor. Midd.) 



SANICULA. (Sanicle.) 



i. S. europea. L. (Wood Sanicle.) 

 Woods and thickets. 6, 7. 

 Woods at Bentley Priory, Stanmore, Pinner Wood. 



APIUM. (Celery.) 



i. A. graveolens.* L. (Smallage, or Wild Celery.) 

 Wet places, generally near the sea. 6-8. 

 Railway Bank, near Railway Bridge. (Farrar.) Green- 

 ford, and between Peri vale and Harrow. (Lees.) All 

 likely garden escapes. 



PETROSELINUM. (Parsley.) 



i. P. sativum.* Hoffm. (Common Parsley.) 



Old walls. 6-8. 



On an old garden wall in the rear of houses in Crown 

 Street, Hog Lane, Harrow, now nearly extinct there. 



HELOSCIADIUM. (Marsh Wort.) 



i. H. nodiflorum. Koch. (Procumbent Marsh Wort.) 

 Sides of rivulets and ditches. 7, 8. 

 Side of Canal, Greenford ; streams at Pinner. 



