EUPHORBIACEAE. 



75 



greenish: sepals 1-1.5 mm. long: wings oval to suborbicular-oval, 2-2.5 mm. 

 long: keel 2-2.5 mm. long: capsules oval-elliptic, about 2 mm. long. — Pinelands 

 and palmlands, L. keys. 



4. P. Carteri Small. Plants 1-5.5 dm. tall: leaf -blades various, those of the 

 lower leaves spatulate, those of the upper linear-oblong to almost linear: 

 racemes acute, greenish: wings oblong, sometimes broadly so, abruptly pointed: 

 capsules fully 1 mm. wide: seeds oval, about 1 mm. long. — Low pinelands, L. 

 keys.— [E. K.] 



Order EUPHORBIALES. 



Herbs, shrubs or trees. Leaves various, sometimes reduced to scales 

 or almost wanting. Flowers mainly monoecious or dioecious, regular. 

 Calyx of several sepals. Corolla of several petals, or often wanting. 

 Androecium of more than one stamen, except when the staminate flowers 

 are scattered over the inside of an involucre. Filaments distinct or united. 

 Anthers opening by longitudinal or transverse valves. Gynoecium 2- 

 several-carpellary or 1-carpellary, superior. Styles or stigmas usually 

 distinct and cleft, or foliaceous. Ovules 1, 2 or 3 in each cavity. Fruit 

 capsular, sometimes achene-like. 



1. Savia. 



Xylophylla. 



PHYLLAN'THIIS. 

 CiCCA. 



Dkypetes. 



Family 1. EUPHORBIACEAE. Spurge Family. 



Plants often with a milky sap. Leaves opposite, whorled or alter- 

 nate: blades entire, toothed, or lobed. Flowers solitary or variously 

 clustered, or much reduced and borne in an involucre. Fruit usually de- 

 pressed or slightly elongate. 



Flowers not in an involucre : calyx of several sepals. 

 Ovules and seeds 2 in each cavity. 

 Stamens 5 : corolla present. 

 Stamens 2 or 3 : corolla wanting. 



Monoecious or rarely dioecious : ovary 3-celled : fruit 

 capsular or baccate. 

 Anthers opening horizontally : fruits capsular. 

 Flower-bearing branches dilated, leaf-like, 



leafless or nearly so. 

 Flower-bearing branches not dilated, leafy. 

 Anthers opening vertically : fruits baccate. 

 Dioecious : ovary 1-2 celled : fruit drupaceous. 

 Ovules and seeds solitary in each cavity. 



Flowers either staminate or pistillate or both in more 

 or less elongated spikes or racemes (pistillate 

 basal). 

 Corolla present in either staminate or pistillate flow- 

 ers or in both (except in Croton piinctatus). 

 Stamens 5-6 : filaments distinct. 

 Stamens 10 : filaments monadelphous. 

 Corolla wanting. 



Styles 2-3 : ovary 2-3-celled. 



Stamens numerous, 8-20, rarely few in some 



flowers. 

 Stamens 1-5. 



Pistillate flowers and capsules pedicelled. 

 Calyx manifest. 



Calyx obsolete or rudimentary. 

 Pistillate flowers and capsules sessile. 

 Styles 6-8 : ovary 6-8-celled. 

 Flowers either staminate or pistillate, or both, in cymes 

 or corymbs. 

 Leaf-blades peltate. 

 Leaf-blades not peltate. 



Flowers in forking cyme-like nanicles. 

 Stamens 10 or more : petals wanting. 



G. 

 7. 



CliOTON. 

 DiTAXIS. 



8. ACALTPHA. 



9. 



10. 

 11. 

 12. 



Tragia. 

 Gymnanthes. 

 Stillingia. 

 Hippo MANE. 



13. RiciNcs. 



14. Cnidoscolus. 



