164 . POPULAR FIELD BOTANY. 
long, to enable it to reach this point. It is a small plant, 
from three to six or eight inches long, lying on the ground. 
The flowers are long, very slender, and nearly white. It is 
found in dry gravelly walks. 
TriroLtium scaBRruM. ough rigid Trefoil. A small 
spreading species in chalky and dry sandy fields in several 
parts of England, but not very common. The oval heads 
of flowers are small, and not on long footstalks, as is usual 
with the rest. Flowers very small, and yellow. Leaves like 
the other species, divided into three parts, silky and strongly 
nerved. 
DIADELPHIA. DECANDRIA. 
CALYCIFLOR&. FaBACEA. 
MEDICAGO. (MzpiIcx.) 
Generic Character. Seed-vessel with one cell, one or many 
seeds, and spirally twisted. 
Mepicaco macunatTa. Spotted Medich. This has the 
leaves similar to the Trefoils, divided into three, and with a 
purplish spot in the centre. The seed-vessel is curious, and 
causes it to be readily distinguished. The pod is rolled up 
so as almost to resemble a little shell, the whole bunch 
