CRASSULACE^J. 41 



a. S. arvensis. It. Seeds with minute raised points. 

 Alperton. (Flor. Midd.) 



ft. S. vulgaris. Boeningh. Seeds with white or brown 



club-shaped papillae. 



Corn-fields, Ruislip ; Woodridings, Pinner. Stanmore 

 Heath, Harrow Weald Common. (Flor. Midd.) 



ORDER XXXV. CRASSULACE^E. (HOUSE LEEK TRIBE.) 



TILL^SA. 



i. T. muscosa. L. (Mossy Tillsea.) 

 Barren sandy heaths. 6, 7. 

 On an old wall near Kingsbury. (Wharton.) 



SEMPERVIVUM. (House Leek.) 



I. S. tectorum.* L. (Common House Leek.) 



House tops and on walls. 7, 8. 



Not unfrequent on the roofs of cottages. A question- 

 ably indigenous plant. 



SEDUM. (Stonecrop.) 



1. S. Telephium. L. (Orpine. Livelong.) 

 Hedgebanks and thickets. 7, 8. 



Stanmore. (Varenne.) Copse in Headstone Lane, 

 Pinner ; plentiful. Not unlikely the S. Fabaria, Koch. 



2. S. album.* L. (White Stonecrop.) 

 Calcareous rocks and walls. 7, 8. 



Stanmore, probably not wild. (Varenne.) Introduced 

 from Westmoreland into several Gardens in Pinner. 

 E 2 



