72. EUPHORBIACE.E. 367 



1. EMPE'TRTJM Linn. Crowberry. 



1. E. nigrum (L.) ; procumbent, 1. linear-oblong their mar- 

 gins meeting in a white line beneath. E. B. 526. A small 

 leafy heathlike shrub. Fl. axillary, small, purple. Stigma 

 with 9 rays. Berries black. Mountain heaths. Sh. V. -E. 8. 1. 



Order LXXII. EUPHORBIACE^E. 



Fl. monoecious or dioecious. Perianth lobed or 0. Male 

 flowers of 1 or more stamens. Anth. 2-celled. Fern. fl. of 1 

 superior 2 3-lobedand2 3-celled ovary. Styles 2 3. Stigma 

 compound or simple. Caps, opening with elasticity ; cells 2 3, 

 with 1 or 2 suspended seeds in each. Embryo in fleshy albu- 

 men. Radicle superior. Stip. often present, but very de- 

 ciduous. 



1. Biixus. Fl. monoecious. Male. Cal. 3-parted. Pet. 2. 

 Stam. 4.- Fern. Cal. 4-parted. Pet. 3. Caps, with 3 horns, 

 3-calied, 6-seeded. 



2. EUPHORBIA. Fl. incomplete, collected into monoecious 

 clusters consisting of 1 female and many maleflowers. Invo- 

 lucre bellshaped with 4 or 5 divisions and 4 or 5 alternate 

 glands. Males consisting of a single stamen upon a pedicel, 

 intermixed with scales and surrounding the female. Fern, 

 of 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 16. Fern. Two barren fila- 

 ments. Style short, forked. Caps, ^-celled. Cells 1-seeded, 

 bursting at the back. 



1. Bux'us Linn. Box. 



1. E. semper vir ens (L.) ; 1. ovate-oblong coriaceous shining 

 above, petioles ciliate, anth. ovate-sagittate. E. B. 1341. A 

 small bushy tree 10 12 feet in height. Dry chalky hills 

 especially in Surrey and Kent, rare. T. IV. VI. E . 



2. ETJPHOR'BIA Linn. Spurge. 

 A. Leaves with stipules, opposite. Clusters axillary. 

 1. E. Pep' Us (L.) 5 st. procumbent forked, heads solitary, caps. 



