514 MINNESOTA BOTANICAL STUDIES. 



in a long, loose, leafy panicle, polygamo-dicecious ; filaments 

 narrow, anthers rather long, taper pointed : akenes slightly 

 stalked, ovoid, glabrous or pubescent with 6 to 8 longitudinal 

 wings; style slender, persistent; stigma long and narrow, 

 Canada to Florida, west to the Rockies. June, Aug. Intro- 

 duced 1883. 



Var. ceriferum AUSTIN, Gray Man. 5 ed. 39. 1867. 

 T. revolutum LEG. 1. c. 146. /. 3,f* i - 



This is a variety with waxy glands. 



T. polygamum MUHL. Cat. 54. 1813. 

 T. corynellum DC. Syst. I: 172. 1818. 

 T. Cornuti var ,9 HOOK. 1. c. 3. 

 T. CornutiToKK. & GRAY, Fl. i: 38. 1838. 

 T. leucostemon KOCH. & BAUCHE, Ind. Sem. Hort. Berol. 



App. 13. 1854. 



Erect, 3 to 8 or more ft. high, branching and leafy, smooth or 

 pubescent, not glandular : leaves 3-4 times ternate or terminally 

 pinnate ; leaflets oblong to orbicular, bases variable, 3-5 apical 

 lobes : flowers in a long, leafy panicle, polygamo-dioecious ; 

 sepals white ; filaments broadened when young ; anthers short: 

 akenes ovoid, stipitate, 6-8-winged or ribbed ; with stigmas as 

 long, which become curled. July-August. Low or wet 

 grounds, Canada to Florida, west to Ohio. Introduced 1881. 

 Lee. 2. f. 12, T. pubescens Pursh, Fl. 2: 388, 1814, is 

 probably a very pubescent form of this and might be called 

 var. -pubcscens. 



Var. macrostylum ROBINSON, Syn. Fl. i : 17. 1895. 

 T, Cormiti var. macrostylum SHUTTLE, in Dist. PL 



Rugel, 1845-6. 



T. Cornuti var. monostyla BOT. ZEIT. 3: 218, 219. 1845. 

 T. macrostylum SMALL & HELLER, Mem. Torr. Club, 



3: 8. 1892. 



Slender; leaflets small, nearly entire: fertile flowers less 

 numerous and in a more spreading panicle : akenes in a small, 

 dense, spherical head. Mountains of western North Carolina 

 to Georgia. 



T. aquilegifolium LINN. Sp. PI. 547. 1753. 



Stem large, hollow, i to 3 feet high, glaucous : leaves once or 

 twice 3-5 -parted ; leaflets stalked or the lateral ones nearly ses- 

 sile, slightly lobed or obtusely toothed, smooth, suborbicular : 



