220 Class XIII. Order VI. 



Syn. CLEMATIS VF.RTICILLARIS. Decandolle. 



An eleg-mt climbing 1 vine with large flowers. The stem gives* 

 off opposite axillary buds, out of each of which proceed two 

 ternate leaves and a fine purple flower. Petals four, oblong- 

 ovate, ciliate, an inch or more in length. In Brooklyn, Con- 

 necticut, and in Vermont. June. 



225. THALICTRUM. 



THALICTRUM DIOICUM. JL. Early Thalictrum. 



Flowers dioecious ; filaments filiform ; leafets round- 

 ish, with obtuse lobes. 



A small species, flowering in woods early in May. Stem 

 smooth, very slightly furrowed, jointed. Leaves compounded 

 twice or more ; leafets smooth, thin, roundish or reniform, paler 

 beneath, with rounded lobes and teeth. Flowers panicled. Co- 

 rolla of about five oval, obtuse, purplish petals. The barren 

 flowers have many stamens with capillary filaments, and oblong, 

 brown or purplish, and sometimes yellow anthers. The fertile 

 flowers are smaller and less crowded. Germs from four to twelve, 

 with curved stigmas. Seeds oval, furrowed, tipt with the 

 style. 



THALICTRUM CORYNELLUM. Decand. -Meadow Thalictrum. 

 Flowers polygamous ; filaments clavate ; fruit ses- 

 sile, striate ; leafets obtusely three lobed, pale under- 

 neath. 



Sijn. THALICTRUM poLrcAMUM. Muhl ? 



A tall plant, common in meadows. Stem erect three or four 

 feet high, smooth, furrowed, jointed. Leaves more than decom- 

 pound, with jointed petioles ; leafets rounded, obtuse or hearted 

 at base, smooth, green above, pale underneath, ending in several 

 obtuse lobes. Flowers panicled. Corolla of four or five white 

 or greenish petals, deciduous. The barren plants contain about 

 forty stamens in each flower ivith white, club shaped filaments 

 and oblong yellow anthers. The fertile plants have a few sta- 

 mens of the same kind, surrounding a bunch of oval greenish 

 germs, each of which bears a white recurved stigma. Seeds 

 oval, ribbed, June, July. 



