71. EMPETRACE^ 72. EUPHORBIACE^. 289 



2. AsARUM Linn. Asarabacca. 



1. A. europ(Bum (L.); 1. reniform obtuse. — E. B. 1083. St. 2. 7- 

 — St. short, with 2 leaves, between which there is a solitary 

 drooping dull green fl. Segments of the perianth ovate and in- 

 curved. Filaments extending beyond the anthers. — Woods in 

 the north, rare. P. V. E. 



Order LXXI. EMPETRACE^. 



Dioecious. Perianth of hypogynous scales imbricated in several 

 rows. Stam. equal in number to the inner row of scales and 

 alternate with them, free. Ovary free, on a fleshy disk, 2 — 9- 

 celled. Ovules solitary, ascending. Style 1. Stigma radiant. 

 Fr. fleshy with bony cells. Embryo in the axis of fleshy albumen. 

 Radicle inferior. 



1. Empbtrum. Cal. 3-parted. Pet. 3. Stam. 3 in the 



male fl. Style short ; stigma dilated, peltate, with 6 — 9 



rays. Berry globose, 1 -celled. Seeds 6 — 9. — G.F. G. Mo- 

 nochl. 42. 



1 . Empetrum Idnn. Crowberry. 



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

 meeting in a white line beneath.— S. B. 526. — A small procum- 

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

 with 9 rays. Berries black. — Mountain heaths. Sh. V. 



Order LXXII. EUPHORBIACE^. 



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 simple. 

 Caps, opening with elasticity ; cells 2—3, with 1 or 2 suspended 

 seeds in each. Embryo in fleshy albumen. Radicle superior. — 

 For tig. of genera see G. F. O. Monochl. 36. 40. 41. 



1. Buxus. Fl. monoecious. — Male. Cal. 3-parted. Pet. 2. 

 Stam. A. — 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 many male flowers. Invo- 

 lucre campanulate, with 5 divisions and 5 alternate glands. 

 Males consisting of a single stamen upon a pedicel, inter- 

 mixed with scalesand surrounding the female. — Fem. a single 

 pistil. Styles 3. Stigmas bifid. Caps. 3-celled, bursting 

 at the back. Seeds soUtai-y, pendulous. 



