KNOT-GRASS TRIBE. 



231 



white flowers, with 3 stamens. The lower leaves grow 

 in fours, the upper in pairs. Fl. May August. An- 

 nual. 



5. SPERGULARIA (Sandwort Spurrey). 

 1. S. rubra (Field Sandwort Spurrey). Leaves linear, 

 somewhat fleshy, pointed with a minute bristle ; stipules 

 chaffy ; stems prostrate ; seeds rough. A small branching 

 annual, with purple flowers, common in sandy fields. 

 Fl. June August. Annual. 



SP^RGULA ARV^NSIS (Corn Spurrey). 



