CLASS XX. ORDER XIII. roi 



pistils many: capsules aggregate, l-seeded. 5. 13 

 — sagittifulia-t (arrow-head) leaves lanceolate acu- 

 minate sagittate with strait lanceolate hind lobes. 

 %. w. 



Calla. Spathe ovate becoming expanded : spa- 

 dix covered with the fructification : stamens inter- 

 mixed. Staminate flowers — calyx and corol ; 

 anthers sessile. Pistillate flowers— -calyx and corol 

 : berries 1 -celled croAvned with the short style. 

 2. 7 — palustrist (water arum) leaves cordate, spathe 

 ovate. 11 . w. 



Arum. Spathe cuculate : spadix not entirely 

 covered with the fructification ; being more or less 

 naked above, with pistillate flowers beneath and 

 staminate in the middle ; (sometimes a fev/ are 

 staminate beneath :) berry mostly I -seeded : gen- 

 erally cirrose-glandular beneath. 2. 7 — tri/ihyllum^ 

 (Indian turnip) leaves ternate, with ovate entire 

 leafets, naked part of spadix very long clavate. JJ.. 

 p. y. g. Near Williams* college mostly dioecious. 

 ^^virginicum, leaves heart-sagittate acute with ob- 

 tusish hind lobes, naked part of spadix very short. 

 In wet places. 



PoTERiuM. Staminate flowers — calyx 4-leaved : 

 corol 4-parted : stamens 30 to 50. Pistillate flow- 

 ers — calyx and corol like the staminate : pistils 2 : 

 berry from the indurated tube of the corol. 54. 92 

 —-sanguisorbai (burnet) stem sub-angled, filaments 

 exsert. %■ e. 



QuERcus. Staminate flowers — calyx sub-5- 

 cleft : stamens 5 to 10. Pistillate flowers — calyx 

 1 -leafed, entire, scabrous, (a woody cup :) siyies 2 

 to 5 ; nut coriaceous, surrounded at the base by 

 the permanent calyx. I2 50. 99 — Leaves obo- 

 VATE, TOOTHED — viiontana, (rock-oak, or chesnut 

 oak) leaves nearly equal-toothed. — bicolor, (swamp 

 oak) leaves unequally toothed with entire base. — 



K 2 



