Mercurialis, Euphorbia, [Croton, Ricinus, Hevea, 
Manihot, Codiceum, Poinsettia.'] 
Family 50. CALLITRICHACB^.^ Herbs, ± 
submerged. Lea. opposite, entire. Flow, axillary, 
monoecious, naked; of i terminal sta., 9 (2) 
carp., with 2 styles, divided by false partitions into 
4 cells, each with i ovule. Fr. separating into 4 
mericarps. Seeds endospermous. Callitriche. 
Order 15. SAPIN DALES. 
Trees or shrubs (exc. Impatiens). Characters as 
of Geraniales, but ovule with dorsal raphe (or, if 
with ventral raphe, ascending with the micropyle 
directed downwardsj.f 
Family 51. BUXACB^. Bvergreen shrubs. 
Lea. entire, leathery, exstipulate. Flow, monoecious, 
actinomorphic. Per. single, generally 4; sta. 4 (in 
Brit. sp.). Carp, usually (3), with 3 styles; each 
carp, with i or 2 pendulous anatropous ovules. Fr. 
a loculicidal capsule [or drupe]. Seeds endosper* 
mous. Buxus. 
Family 52. BMPBTRACB^. Small heath-like 
shrubs. Lea. linear, evergreen, exstipulate, with 
strongly recurved margins. Flow, small, axillary, 
i-sexual, dioecious (occasionally ^), actinomorphic. 
Per. double. Sep. 2 — 3. Pet. 2 — 3. Sta. 2 — 3. 
Carp. (2 — 9), each with i ascending anatropous 
ovule with ventral raphe. Fr. a drupe. Seeds endo- 
spermous. Empetrum, 
* The position of this family is quite uncertain. 
tin other words, if an ovule is looked at on the right 
of the plac., the direction of the axis of raphe and ovule 
is always curved clockwise in Sapindales and anti-clockwise 
in Geraniales. 
26 
