344 
IOWA ACADEMY OF SCIENCE Vol. XXIX, 1922 
278. Iridaceae 
Iris versicolor 
Sisyrinchium Bermudianum 
284. Orchidaceae 
Plantanthera leucophaea 
Calopogon pulchellus 
Cypripedium pubescens 
Cypripedium candidum 
Cypripedium spectabile 
Filices 
Allosorus gracilis 
Polystichum acrostichoides 
swamps 
May, prairies 
moist places on prairie 
June, bogs and moist sandy places 
hillsides and prairies 
moist banks 
June, shady hills 
shaded rocks, Davenport 
shady river banks 
Department oe Botany, 
Grin nell College. 
