240 MINNESOTA BOTANICAL STUDIES. 



Washingtonia longistylis (Torr.) Britton, 111. Fl. 2: 530. 

 1897. Sweet cicely. 

 Osmorrhiza longistylis DC. Prodr. 4: 232. 1830. 

 Myrrhis aristata (Thunb.) MacM. Met. Minn. Val. 398. 

 1892. 

 Common in woods throughout. 

 Herb. : Numerous specimens. 

 Conium maculatum L. Sp. PI. 243. 1753. Poison hemlock. 

 A European species reported from the Red river valley by 

 Upham. There are no Minnesota specimens in the University 

 Herbarium. 



Zizia aurea (L.) Koch, Nov. Act. Caes. Leop. Acad. 12 : 129. 



1824. Early meadow-parsnip. 



Thasfiium aureum afiterum Gray, Man. ed. 2, 156. 1856. 



Very common throughout except northeast. Confused by 



many authors and collectors with Thasfiium trifoliatum aureum 



(Nutt.) Britton and Thasfiium barbinode (Michx.) Nutt. 



Herb. : Very numerous collections. 

 Zizia cordata (Walt.) Koch in DC. Prodr. 4: in. 1830. 

 Heart-leaved meadow-parsnip. 

 Thasfiium trifoliatum afiterum Gray, Man. ed. 2, 156. 



1856. 

 Thasfiium aureum cor datum (Walt.) B.S.P. Cat. N. Y. 

 1888. 

 Common throughout except northeast. 

 Herb. : Numerous collections. 

 Cicuta maculata L. Sp. PI. 1 : 256. 1753.*,- Water hemlock. 

 Cicuta virosa maculata C. & R. Rev. N. A. Umbell. 

 131. 1888. 

 Common throughout, especially south. 

 Herb. : Numerous specimens. 

 Cicuta bulbifera L. Sp. PL 1: 255. 1753. Bulb-bearing 

 water-hemlock. 

 Common in moist soil throughout. 

 Herb. : Many collections. 

 Deringa canadensis (L.) Kuntze, Rev. Gen. PI. 1 : 266. 1891. 

 Honewort. 

 Cryfitotamia canadensis DC. Prodr. 4: 119. 1830. 

 Common in woods throughout. 

 Herb. : Numerous collections. 



