SYNOPSIS or THE GENERA. 



pieces. Stamens with the anthers sessile, opposite the 

 pieces of the perianth. Pistils four, alternating with the 

 stamens, becoming compressed. J^ats, each containing 

 a suspended, curved, more or less spiral seed. 



20. Rcp'piA, [Page 217.] Flowers two, from the base of the leaves. 



Calyx and corolla wanting. Seeds four, convex at one 

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

 peduncle. 



21. Sagi^na, [Page 217.] Calyx inferior, of four permanent 



leaves. Petals four, shorter than the calyx, sometimes 

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

 numerous, each attached to the receptacle by its own stalk. 



22. M(En'chia, [Page 218.] Calyx inferior of four permanent 



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

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

 minute teeth. Seeds numerous, attached to the receptacle. 



23. TiLL^'A, [Page 218.] Calyx of three or four segments. 



Capsules three or four oblong, recurved, bursting length- 

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



24. Radiola, [Page 219.] Calyx or four pieces united together 



half way up each, mostly three-cleft. Petals four, 

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

 ovate, solitary, compressed. 



(See Cerastium tetrandum in Class X.) 



