156 Annals of the Carnegie Museum. 



Family EUPHORBIACE^. 



Key to the Species Enxjmerated. 



Flowers not in an involucre; caljTc of several sepals. 

 Ovules or seeds two in each cavity. 



Stamens in the staminate flowers 5; staminate flowers densely clustered; 

 shrubs. 

 Leaves lance-oblong or lance-oval, sublustrous on upper surface. 



368. Savia sessiliflora. 

 Leaves obovate or elliptic-obovate, strongly lustrous above. 



369. Savia perlucens. 

 Three stamens; fruit a three-celled capsule; leaves entire {Phyllanlhus). 

 Staminate flowers with 5 sepals; styles slender. 



Stipules scarious; filaments free 372. Phyllanthus heliotropus. 



Stipules withered dark-brown in upper half; filaments connate into a 



column 370. Phyllanthus nanus. 



Stipules never scarious; filaments connate into a column. 

 Flowers monoecious. 



Anthers not opening in one continuous rift; seeds longitu- 

 dinally ridged 371. Phyllanthus Niruri. 



Anthers opening in one continuous circular or triangular rift; 

 seeds not longitudinally ridged. 



375. Phyllanthus cyclanthera. 

 Anthers not opening in one continuous rift; seeds not longi- 

 tudinally ridged 376. Phyllanthus diffusus. 



Flowers dioecious; style bifid; seeds dorsally and faintly sub- 



costate, transversely striolate 374. Phyllanthus junceus. 



Staminate flowers with four sepals; styles short and thick; a tall climber. 



373. Phyllanthus scandens. 

 Ovules and seeds solitary in each cavity. 



Filaments inflexed in the bud; staminate flowers mostly with a corolla; 

 flowers spicate or racemose, in axils or terminal (Croton). 

 Receptacle of the staminate flowers hairy. 



Lobes of the calyx equal in the pistillate flowers. 



Leaves with scurfy-scales; stamens about 6; styles 4-parted. 



377. Croton cerinus. 

 Leaves not scurfy-scaly. 



Lower leaves orbicular, 3-s-nerved. 



383. Croton craspedotrichus. 

 Leaves mainly pinnately veined; if with 3-5 nerves, these 

 short; leaves longer. 



Seeds smooth 385. Croton discolor. 



Seeds minutely foveolate-impressed. 



381. Croton SagrcEanus. 

 Two lobes of the calyx of the pistillate flowers larger than the others. 



381. Croton Sagraanus. 

 Receptacle of the staminate flowers smooth; calyx-lobes all equal. 



379. Croton lobatus. 



