CLASS II. ANGIOSPERM^E. 171 



Arisaema dracontium (L.) Schott. Dragon-root. Less abund- 

 ant, in alluvial woods. Decorah (Cratty). 



Spathyema foetida. (L.) Raf. (Symplocarpus foetidus 

 Salisb.) Skunk Cabbage. Common in shaded bogs. Decorah 

 (Cratty), Bluffton, etc. 



Acorus calamus L. Calamus. Locally common in swamps and 

 bogs. Decorah (Cratty), Hesper, said to be introduced. 



Family 2. Lemnacea. Duckweeds. 



Spirodela polyrrhiza (L.) Schleid. Greater Duckweed. Float- 

 ing on still water, abundant locally. Decorah (Cratty). 



Lemna trisulca L. Duckweed. Not rare, in still water. Decorah 

 (Cratty). 



Order 5. Xyridales 

 Family 1. Commelinacece , 



Tradescantia bracteata Small. (T. virginica L., in part.) 

 Long-bracted Spiderwort. Common in sandy soil. Decorah 

 (Savage) ; Ft. Atkinson. 



Tradescantia reflexa Raf. (T. virginica L., in part.) Reflexed 

 Spiderwort. Common, in sandy soil. Calmar. 



Order 6. Liliales. 

 Family 1. Juncacece. Rushes. 



Juncus tenuis Willd. Slender Rush. In hard soils, common. 

 Calmar; Decorah (Goddard). 



Juncus vaseyi Engelm. Vasey's Rush. Not rare. In moist 

 open places. Ft. Atkinson. 



Juncus nodosus L. Knotted Rush. Common along edges of 

 ponds and in open boggy places. Ft. Atkinson. 



Family 2. Melanthacecz. 



Zygadenus elegans Pursh. Glaucous Zygadenus. Not com- 

 mon. Decorah (Goddard). 



Uvularia grandiflora J. E. Smith. Common Bell-wort. Com- 

 mon in rich woods. Hesper, Ft. Atkinson; Decorah (Goddard). 



Uvularia sessilifolia L. (Oakesia sessilifolia Wats.) Sessile- 

 leaved Bell-wort. Reported by Fitzpatrick. 



Family j. Liliacece. Lilies. 



Allium tricoccum Ait. Wild Leek. Locally common in rich 

 woods. Hesper. 



Allium cernuum Roth. Nodding Wild Onion. On shaded 

 banks, etc. Not rare. Hesper; Decorah (Arthur). 



