130 POPULAR FIELD BOTANY. 
TETRANDRIA. ‘TETRAGYNIA. 
THALAMIFLORZ. CARYOPHYLLACES. 
MENCHIA. (Mencuata.) 
Generic Character. Calyx of four leaves. Petals four, as long 
as the calyx. Seed-vessel opening with eight teeth. 
Mencuia ERECTA. Upright Menchia. ‘This small weed 
resembles greatly the Saginas m form and flower; but its 
white and narrow petals are as long as the calyx. The stem 
is from two to four inches high, erect, occasionally a little 
reclining at the base. The leaves are long, pointed, and 
smooth. Calyx leaves large, pointed, and having a thin 
white membrane at the edge. 
TETRANDRIA, TETRAGYNIA. 
CALYCIFLORA. CRASSULACEZ. 
TILLAA. (Tr1Ha.) 
Generic Character. Calya divided into three or four parts. 
Petals three or four. 
Trrt#a muscosa. Mossy Tillza. This very minute 
plant is frequent on gravel walks, dreary sands, and moist 
barren heaths, in various parts of the country, particularly 
