50 POPULAR FIELD BOTANY. 
has been known to cause illness. "This species makes its 
appearance in March, the others rather later. 
PENTANDRIA. DIGYNIA. 
MoyocHLAMYDES. ULMACE. 4 
ULMUS. (E1m.) 
Generic Character. Calyx of one leaf, wrinkled and permanent, 
divided into from four to six segments, internally coloured. No 
corolla. Stamens projecting beyond the calyx. Seeds solitary. 
The Elm comes into flower in this month, and seven 
species are mentioned in botanical works as natives of this 
country ; but some are very doubtful, and only sparingly 
found. They are large handsome trees; but their timber is 
of less value than Oak, Chesnut, or Fir. It is tough and 
strong, but apt to warp and shrink. 
Uxmus campestris. Common small-leaved Elm. Its leaves 
are oval and acute, doubly serrated or cut, smooth above and 
downy beneath. Flowers in dense heads, each having a 
small scale or bractea. Calyx of one leaf divided into seg- 
ments, internally coloured. It is a large tree, with rugged 
bark and spreading branches, and grows in woods in the 
rs 
