THALICTRUMS OF NORTH AMERICA. 513 



to southern Colorado, Europe, northern Asia, Greenland and 

 Iceland. Bot. Mag. 2237. Lee. ^.f. 13 (f). 



T. minus LINN. Sp. PI. 546. 1753. 

 T. saxatile VILL. Prosp. 50. 1779. 

 T. purpureum SCHANG. in Pall. N. Nord. Beitr. 6: 42. 



1794. 

 T. saxat His HORT. 



Stems round, sulcate, i to 2 feet high : leaflets variable, acute 

 or obtusely lobed, often glaucous : flowers drooping in loose 

 panicles, perfect ; sepals yellow or greenish : fruit ovate-oblong, 

 sessile, striated. Summer. Europe, Asia, northern Africa. 

 A polymorphous species in the variation of the leaflets. Lee. 

 5./ 2,3, 4. 



Var. adiantifolium HORT. 

 T. adriantoides HORT. 



T. adiantifolium BESS, ex Eichw. Skizze 182. 1830. 

 Leaflets resembling those of Adtantum; a form much used 

 and admired. 



Var. Kemense TRELEASE, 1. c. 300. 1886. 

 T. Kemense FRIES, Fl. Holland, 94. 1817-18. 

 T. minus var. elatum LEG. 1. c. 283. 1885. In part. 

 Leaves thrice-ternate ; otherwise much like the type. 



T. glaucum DESF. Thai, i ed. 123. 1804. 



T. speciosum HORT. ex POIR. Encycl. 5: 315. 1804. 



Stems erect, round, striated, glaucous, 2 to 5 feet high : leaf- 

 lets ovate-orbicular, 3-lobed, lobes deeply toothed : flowers in 

 an erect panicle, perfect ; sepals and stamens yellow : fruits 4 

 to 6, ovate, striated, sessile. June, July. Southern Europe. 

 Lee. 5,/. 



T. purpurascens LINN. Sp. PI. 546. 1753. 

 T. rugosum PURSH. Fl. 2 : 389. 1814. 

 T. revolutum DC. Syst. i: 173. 1818. 

 T. CornutiMM. a HOOK. Fl. i: 3. t. 2. 1833. 

 T. dasycarpum FISCH. & LALL. Ind. Sem. Hort. Petrop. 



72. 1841. 



T. purpureum HORT. 



A polymorphous species, allied to T. polygamum: stem 3 to 

 6 feet high, branching above, leafy, pubescent or glabrous, 

 sometimes glandular ; leaflets larger than in that type : flowers 



