TETRANDRIA TETRAGYNIA. 43 



3. S. apetala, stems nearly upright, hairy ; leaves bristle- 

 pointed, fringed ; petals very small, or wanting. Annual Pearl- 

 wort. 



Hab. Dry barren places, rare. On the parapet of the 

 Walls at Fisher's Fort, plentiful. May, June. 



55. RADIOLA. 



1. R. millegrana, 1-2 inches high, repeatedly dichotomous, 

 bushy ; leaves sessile, opposite, ovate, smooth ; flowers axillary, 

 solitary, stalked, numerous, white. All-seed. 



Hab. Wet sandy ground rare. Ancroft Moor. July, 

 Aug. 



