EUPHORBIACE^:. 
263 
Order LXXIIT. EUPHORBIACE^E. 
Fl. usually monoecious. Perianth lobed or 0. Male flowers 
of 1 or more stamens. Anth. 2-celled. Fern. fl. of 1 superior 
2 — 3-celled ovary. Styles 2 — 3. Stigma compound or sim- 
ple. Caps, opening with elasticity; cells 2 — 3, with 1 or 2 sus- 
pended seeds in each. Embryo in fleshy albumen. Radicle 
superior. 
1. Buxus. Fl. monoecious. Male. Cal. 3-parted. Pet. 2. 
Stam. 4. Fem. Cal. 4-parted. Pet. 3. Caps, with 3 
horns, 3-celled, 6-seeded. 
2. Euphorbia. Fl. incomplete, collected into monoecious 
heads consisting of 1 female and numerous male flowers. In- 
volucre campanulate, with 5 divisions and 5 alternate glands. 
Males naked consisting of a single stamen upon a pedicel, 
intermixed with scales and surrounding the female. Fem. a 
single pistil. Styles 3. Stigmas bifid. Caps. 3-celled, 
bursting at the back. Seeds solitary, pendulous. 
3. Mercurialis. Fl. dioecious or monoecious. Perianth 
3-parted. Male. Stam. 9 — 12. Fem. Style short, forked. 
Caps. 2-celled. Cells 1 -seeded, bursting at the back. 
1. Buxus Linn. 
1. B. sempervirens (L.) ; I. ovate-oblong coriaceous shining 
above, petioles ciliated, anth. ovate-sagittate. — E. B. 1341. — A 
small bushy tree of 10 — 12 feet in height. — Dry chalky hills, 
rare. T. IV.— VI. Box. E. 
2. Euphorbia Linn. 
* Leaves with stipules. 
1 . E. Peplis (L.) ; st. procumbent branched, heads axillary 
solitary, caps, keeled, seeds smooth, 1. opposite stalked half- 
heartshaped nearly entire glabrous. — E. B. 2002. R. 4753. — 
St. usually much tinged with purple, glaucous. The only British 
species which has stipules. — Loose sand of the southern sea-coast. 
A. VII.— IX. E. 
** Stipules 0 in this and all the following sections. Involu- 
cral glands without membranous processes, roundish or 
transversely oval. 
f Seeds netted. 
2. E. Helioscopia (L.) ; umbel 5-fid then 3-fid and 2-fid, bracts 
and 1. membranous obovate-wedgeshaped serrated upwards, caps, 
smooth glabrous, seeds netted rugose. — E. B. 883. R. 4754. — 
Waste and cultivated ground. A. VI. — IX. Sun Spurge. 
