84 
EUPHOR’BIA. 
Leaves opposite on the stem. 
Plant prostrate on the eround; leaves one-sided at | 
L their base. Pep'lis ) 
Plant tall and erect; leaves long, equal-sided, in — 
on the stout stem. 
| Lath’yris. Caper Spurge? 
Leaves not opposite (except just under the flowering 
branches). 
The 4 projections, or “ glands,” surrounding the ovary ) 
( and stamens, rounded, without points. 
Leaves quite entire; ovary and fruit covered with 
longish cylindrical projections. ) 
hiber'na./ 
| ~Leaves finely toothed towards their apex. 
Leaves very wide and blunt at their apex; ovary 
and fruit smooth. 
Heliosco’pia. Sun Spurge. 
Leaves narrowed or pointed at their apex. 
Leaves hairy; ovary and fruit with minute 
projections, usually hairy. 
Nr 
pilo’sa. 
Leaves not (or scarcely) hairy; fruit with wart- 
like projections, not hairy. 
L platyphyl'los. 
The “ glands” surrounding the flowers crescent-shaped, | 
with fine, projecting points. 
Leaves (or bracts) at the base of the flowering ~ 
branches joined together across the stem. 
amygdaloi'des. Wood Spurge? 
Leaves not joined across the stem. 
Upper leaves not much longer than wide; ovary 
( and fruit with deep furrows at the angles. ) 
[ Pep'lus. Petty Spurge J 
Leaves narrower; fruit scarcely furrowed at the 
angles. 
Bracts under the flowers narrow; (leaves on the 
stem very narrow). 
ae | ae ee 
exig’ua.? 
Bracts nearly or quite as wide as long. 
Stem ending in an umbel of 8-12 branches 
springing together from its apex ; (plant | 
of northern woods). F'sula./ 
~Not more than 7 branches in the umbel. 
