62 POPULAR FIELD BOTANY. 
out earlier than others on the same branch. The pods are 
something like those of the Garden Wall-flower. They are 
formed of three pieces, one in the centre, and two at the 
sides the latter, when the seeds within are ripe, open at the 
bottom, and suddenly rolling themselves up, throw off the 
seeds to a considerable distance, thus dispersing them. 
Plant from three inches to a foot high, varying in luxuri- 
ance according to soil and situation. More or less hairy. 
Growing in loose soil in shady places from March to July, 
and very common. 
CARDIMINE PRATENSIS. Cuckhoo-flower. This plant I 
have found occasionally in February and always in March, 
though the botanical books mention May. Leaves pinnate 
or divided, leaflets of the root-leaves roundish, and toothed, 
those of the stem-leaves lance-shaped. Flowers iarge, in 
clusters, pale-purple, lilac, or white. Sometimes found 
double and of a pretty delicate colour. It grows in moist 
fields and lanes, and in watery places. 
TETRADYNAMIA, SILICULOSA, 
THALAMIFLOR. CRUCIFERZ. 
DRABA. (WuHITLOW-GRaSS.) 
Generic Character. Calyx of four, somewhat spreading egg- 
