SYNOPSIS 0? THE GENERA. 



pieces. Stamens with the anthers sessile, opposite 

 pieces of the perianth. Pistils four, alternating with 

 stamens, becoming compressed. Nuts, each contain 

 a suspended, curved, more or less spiral seed. 



20. RUP'PIA, [Page 217.] Flowers two, from the base of the lea^ 



Calyx and corolla wanting. Seeds four, convex at < 

 side, slightly keeled on the other, and elevated on a si 

 peduncle. 



21. SAGI'NA, [Page 217.] Calyx inferior, of four perman 



leaves. Petals four, shorter than the calyx, sometir 

 absent. Capsule of one-cell, and four equal valves. St 

 numerous, each attached to the receptacle by its own sti 



22. MCEN'CHIA, [Page 218.] Calyx inferior of four perman 



equal pieces. Petals four, shorter than the calyx. Capi 

 of one-cell, opening at the summit, with eight or 

 minute teeth. Seeds numerous, attached to the recepta 



23. TILLE'A, [Page 218.] Calyx of three or four segmei 



Capsules three or four oblong, recurved, bursting leng 

 wise, two-celled, two-valved, two-seeded. 



24. RADIOLA, [Page 219.] Calyx or four pieces united toget 



half way up each, mostly three-cleft. Petals f< 

 undivided. Capsule of eight cells, and eight valves. St 

 ovate, solitary, compressed. 



(See Cerastium tetrandum in Class X.} 



