IOWA ACADEMY OF SCIENCES. 159 



TJCUPULIFERAE. 



Corylus americana Walt. 



Ostrya virginica Willd. 



Quercus macrocarpa Mx. High prairie and bluffs along river. 



Q. rubra L. 



Q. alba L. 



Q. coccinea Wang. All four species common along larger streams. 



SALICAGEAE. 



Salix amygdaloides And. 

 S. alba L. 

 5. 7iigra Marsh. 



5. Cordata Muhl. Not common. Discovered on Middle river 

 near Madison county line. 



Populus monilifera Ait. 



OKCHIDACEAE. 



Spirattthes gracilis Bigelow. Very rare. Collected by Mr. J. 

 G. Culver on the road between Greenfield and Orient. 



Cypripedium candiduni Willd. Very rare. 



Habenaria leucophea Gray. Once very common. Now almost 

 extinct. 



IRIDACEAE. 



Sisyrinchium augustifolium Mill. 



AMARYLLIDACEAE. 



Hypoxis ere eta L. 



LILIACEAB. 



Allium canadense Kalm. Abundant in two or three restricted 



localities. 



Polygonatum biflortini Ell. Low woodlands or brush. 



Asparagus officinalis L. Escaped from gardens. 



Uvularia granditlora Smith. Woodlands. Not very common. 



Erythronium ajnericatium Ker. Woods. 



Lilliuvi philadelphicum L. 



Trillium nivale Riddell. Woods. 



Melanthium virginicum L. 



Smilacena racemosa Desf. Woods. 



MAYACEAE. 



Tradescantia virginica L. 



TYPHACEAE. 



Typha lali folia L. 



ARACEAE. 



Arisaema triphylluin Tou. 



ALISMACEAE. 



Sagittaria variabilis Eng. 



UThe birch occurs in Guthrie county but has not been discovered in Adair. 



