rOLYPETALOUS EXOGENOUS PLANTS. 143 



*♦ Flowers i)e)fect ; sepals longer than the stamens ; stiginadejyi-essed ; achenia 

 sessili', libbed ; slem-lmves whorled, flowers umbdled. 



T. ANEMONOIDES, Miclix. Radical leaves bitemate, 

 long-petioled ; leaflets oval or roundish, cordate, 3-5-lobed; 

 stem-leaves 2-3, sessile, ternate ; the long-stalked leaflets 

 forming an involucre apparently of 6-9 simple leaves ; 

 umhel 3-6-flowered; sepals 6-10, white; roots tuberous, 

 stem 6-10' high. Flowers |^'-}' in diameter. Woods. 

 April-May. 



6. TEAUTVETTERIA, Fisch. and Mey. 



Sepals 3-5, orbiculas imbricated in the bud, colored, cadu- 

 cous. Petals none. Stamens indefinite ; fllaments clavate ; 

 ovaries numerous, 1-ovuled. Stigma recurved. Achenia 

 capitate, gibbous, 4-sided, beaked by the hooked persistent 

 stigma. Seed erect. Erect, perennial herbs, with alternate, 

 palmately-lobed leaves and corymbose flowers. 



7. MYOSURUS, L. Mouse-tail. 



Sepals 5-7, imbricated in the bud, spurred at the base. 

 Petals 5-7, linear, spatulate. Stamens 5-10; filaments 

 filiform. Ovaries numerous, 1-ovuled, style subulate. 

 Achenia 3-angled, imbricated on the filiform, elongated re- 

 ceptacle. Seeds suspended. Small annuals, with linear 

 radical leaves, and small solitary yellowish flowers on a 

 naked scape. 



M. MINIMUS, L. Sca2)es 2-6' long, longer than the 

 leaves ; achenia beakless. Fruiting-sinhe linear, 1-2' long. 

 April. Flower pale-yellow ; prairies and bottom-lands. 



8. RANUNCULUS, L. Buttercup. 



Calyx of 5 ovate sepals ; corolla of 5 roundish shining 

 petals, each with a nectariferous scale or pore at the base 

 inside ; filaments indefinite. Achenia flattened, beaked, 

 with the smooth persistent style. — Herbs. Leaves alter- 



