Tragia.] 



CXXIl. EUPHORBIACE^ (PRAIN). 



967 



^Leaves never lobed or partite. 

 Letives rounded, truncate or 

 very shallow-cordate at 

 the base ; stems erect or 

 suberect. 

 Leaves densely bristly with 

 stinging hairs; racemes 

 terminal,upto3in.long 28. T. ukamhentU. 

 Leaves without, or with 

 very few stinging 

 hairs ; racemes not ex- 

 ceeding 1 in. in length. 

 Racemes terminal and 

 lateral ; leaves ovate, 

 always distinctly pe- 

 tioled . . . 29. r. impedita. 

 Racemes all lateral ; 

 leaves lanceolate to 

 ovate-lanceolate, of- 

 ten subsessile . . 30. T. angolensis. 

 Leaves distinctly cordate at 

 base ; stems, except in 

 T. arabica^ var. parvifo- 

 lia, long, slender, twining. 

 Pedicels in both sexes dis- 

 tinctly longer than their 

 bracts ; female calyx- 

 segments 2-3-lobulate 

 on each side, little ac- 

 crescent . . . 27. r. Preussii. 

 Pedicels not longer than 

 their bracts in either 

 sex. 

 Female calyx-segments 

 3-4-lobulate on each 

 side. 

 Bracts wide-ovate, gla- 

 brous ; leaves tri- 

 angular - ovate, 



hardly bristly . 25. T. glahrescens. 

 Bracts narrow-lanceo- 

 late or subulate ; 

 leaves o v at e, 

 armed with nu- 

 merous pungent 

 stinging hairs. 

 Leaves narrow-cor- 

 date, pubescent 



and bristly . 20. T. hrevipes. 

 Leaves wide-cordate, 



bristly only . 2L T. Benthamii. 

 Female calyx-segments 

 5-7-lobulate on each 

 side. 

 Leaves ovate-lanceo- 

 late, copiously 



