Davis: THALICTRUMS OF NORTH AMERICA. 515 



flowers in a corymbose panicle, dioecious ; sepals white ; sta- 

 mens purple or white : fruit 3-angled, winged at the angles. 

 May-July. Europe, northern Asia. Bot. Mag. 1818; 2025 

 (as \tt.formosum). Garden 47, p. 357 ; 50, p. 117. Lee. 3. 



f-5- 



The old name, T. Cornuti L. Sp. PI. 545, may be a syn- 

 onym of this, and, if so, it is the older name being published 

 on a preceding page ; but T. Cornuti was described as an 

 American plant which T. aquilegifolium is not. As the descrip- 

 tion and old figures of T. Cornuti L. do not agree with any 

 American plant the name may well be dropped, as Robinson 

 and DeCandolle have suggested. Those plants advertised as 

 T. Cornuti are probably T. aquilegifolium, 



T. debile BUCKLEY, Am. Journ. Sci. 45: 175. 1843. 



Root a cluster of fusiform tubers : stem decumbent, ^ to i 

 foot long, glabrous, simple or branched, few-leaved : leaves 

 2 to 3 times ternate ; petioles long and slender ; leaflets nearly 

 y, inch across, thin, rotund, the 3 rounded lobes entire or again 

 lobed, bases variable : flowers remote, in long, simple panicles, 

 direcious ; stamens often 10, filaments little longer than the an- 

 thers : akenes 2-5, nearly sessile, spreading, oblong, not flat- 

 tened, 8-io-ribbed ; style minute. Moist or shady places. 

 Georgia to Texas. Lee. 2.f.i (f). 



Var. Texanum GRAY, Cat. Coll. Hall, PI. Tex. 3. 1873. 

 Name only. 



Stems more rigid and erect; leaflets smaller, thicker and 

 nearly sessile. A Texas form of the above (t). Described in 

 Syn. Fl. i: 18. 1895. 



T. dioicum LINN. Sp. PI. 545. 1753. 



T, Icevigatum MICHX. Fl. I : 322. 1803. 



T. Carolinianum Bosc. in DC. Syst. I : 174. 1818. 



Rather slender, i to 2 feet high, glabrous : leaves 3 to 4 times 

 3-parted; leaflets thin, orbicular, several-lobed or revolute, 

 bases variable : flowers in a loose, leafy panicle with slender 

 pedicels, dioecious ; stamens much longer than the greenish 

 sepals : anthers linear, obtuse, exceeding their filaments in 

 length : akenes ovoid, nearly or quite sessile, longer than their 

 styles, with about 10 longitudinal grooves. Early spring. 

 Woods. Labrador to Alabama, west to the foot of the Rockies. 

 Introduced sometime before 1891. Lee. 3. f. 2,3. 



