CLASS XX. ORDER XIII. 61 



ORDER VI. HEX AND RI A* 



Zixania. Staminate flowers calyx : corol -glume 

 -valved, awnless, with pistillate flowers intermixed. Pis- 

 tillate flowers calyx : cored-glume 2-vahed, cowled, 

 awned : styles 2-parted ; seed 1 invested in the plaited 

 corol. 



ORDER XIII, POLYAXDSIA. 



Sagittaria. Starninatc flowers calyx 3-Ieaved : corol 

 8-petalled : filaments mostly 24. Pistillate flowers 

 calyx and corol as in the staminate : pistils many : cap- 

 sules aggregate, 1 -seeded. 



Calla Spathe ovate becoming expanded : spadix cov- 

 ered with the fructification : stamens intermixed. Stam- 

 inate flowers calyx arid corol : anthers sessile. Pis- 

 tillate flowers calyx and corol : herries 1 -celled 

 crowned with the short style. 



*ftnnn. Spathe cowled : spadix not entirely covered 

 with the fructification ; being more or less naked above, 

 \vitli pistillate flowers beneath and staniinatc in the mid- 

 die ; (sometimes a few are staminate beneath :) berry 

 mostly 1 -seeded : generally cirrose-glamhiiar beneath 

 (often dioecious.) 



Querciis. Staminate flowers calyx sub-5-cleft : sta- 

 mens 5 to 10. Pistillate flowers calyx 1 leafed, entire, 

 scabrous, a woody cup : styles 2 to 5 : nut coriaceous, 

 surrounded at the base by the permanent calyx. 



Juglans. Staminate flowers ament imbricate : calyx 

 a scale : corol 6-parted : filamentes A- to 18. Pistillate 

 flowers calyx 4 -cleft superior : corol 4-cleft styles 2 : 

 drupe coriaceous or woody : nutsulc ate. 



Castanea. Polygamous. Staminate flowers ament 

 naked, linear : corol 5-petalled : stamens 10 to 20. Pis- 

 tillate flowers calyx 5 or 6-leaved, muricate : germs 3 : 

 stigmas pencil -form ; nuts 3, -with coriaceous putamen, 

 inclosed iit the calyx becoming cchinate. 



Setul a. Staminate flowers ament imbricate, scales 

 peltate S-fiowered : calyx a scale : stamens 10 to 12. 

 Pistillate flowers calyx a 2 -flowered scale : seed 1, 

 \\inged, 



Carpinus. Ament imbricate. Staminate flowers ca- 

 lyx-scales ciliate : stamens 10. Pistillate flowers calyx- 

 scales 2-flowered : corol 3-cleft : nut ovate sulcate; 



F 



