Macaranga.] 



CXXII. EUPHORBIACEiB (pRAIN). 



938 



clustered ; female flowers solitary ; bracts distinct or minute, entire or 

 lobed or fimbriate. 



Species about 100, spread throughout the tropics of the Eastern hemisphere. 



Leaves more or less distinctly lobed. 



Lobes large, separated by narrow sinuses. 



Stipules converted into deep flask -shaped sacs 1. M. saecifera. 

 Stipules not saccate. 



Lobes of leaves with short acute tips. 



Basal sinus of leaf narrow . . .2. 

 Basal sinus of leaf open . . .3. 



Lobes of leaves with long caudate-acumi- 

 nate tips. 

 Leaves glabrous on both sides when 



mature . . . . .4. 



Leaves pubescent on the nerves on both 



sides . . . . . .5. 



Lobes small, separated by wide shallow sinuses. 

 Leaves when mature glabrous on both sides 6. 

 Leaves persistently pubescent on nerves and 

 veins beneath. 

 Stipules narrow, lanceolate . . .7. 



Stipules wide, ovate . . . .8. 



Leaves not lobed. 



Leaves palmately 5-7-nerved from the often 

 slightly peltate base. 

 Leaves membranous, denticulate, acuminate, 



peltate ...... 9. 



Leaves subcoriaceous, entire, acute, only 



slightly and not always peltate . . 10. 



Leaves 3-nerved from the base, or penni- 

 nerved. 

 Leaf -margins more or less sinuate or toothed. 

 Leaves shallowly repand; bracts large, 



orbicular, entire . . . .11. M. Standi ii. 



Leaves distinctly toothed. 

 Bracts toothed or lobed. 



Stipules more or less persistent, 1 in. 

 long or longer; bracts obtuse. 

 Bracts dee])ly laciuiate; segments 



linear 12, M. Beilleu 



Bracts crenate ; segments obtuse . 13. M. Faxii. 

 Stipules caducous, ^ in, long or less ; 

 bracts acute, serrate. 

 Leaves with long white hairs on the 



nerves beneath . . .14. M. togoensis. 



Leaves without long white hairs. 

 Leaves on nerves beneath and 



young twigs rusty-pubescent 15. M» fnotiandra. 

 Leaves and young twigs quite 



glabrous . . . .16. M. Zenkeri. 



Bracts entire, small ; stipules caducous, 



under |- in. long . . . .17. M. Dawei. 



Leaf margins always entire. 



M. Schweinfurthii, 

 M. rosea. 



M. heterophylla. 

 M, dibeelensis. 

 M. occidentalis. 



M. angolensis. 



M, magnistijpulosa. 



M. rutvenzorica. 



M, Jcilimandscharica. 



