32 
IOWA ACADEMY OF SCIENCES 
151. G. longirostris Torr. 
152. C. grisea Wahl. Scarce in woods. 
153. C. conoidea Schk. 
154. C. oligocarpa Schk. In woods. 
155. 0. MtchcocMana Dewey. In woods. 
156. C. meadii Dewey. 
157. G. Jaxiflora, 'blanda (Dewey) Boott. Scarce in thickets. 
158. G. digitalis Willd. In woods. 
159. G. alhursina Sheldon. Plenty in woods. 
160. G. setifolia (Dewey) Britton. 
161. G. pennsylvanica Lam. In' dry soil. 
162. G. puhescens Miihl. In woods. 
163. G. stipata Muhl. Common. Fields and marshes. 
164. G. rosea Schk. Common in woods. 
165. G. rosea, radiata Dewey. Scarce in woods. 
166. G. gravida Bailey. 
167. G. vtilpinoidea Michx. Ahundant. 
168. G. sparganioides Muhl. In woods. 
169. G. cephalophora Muhl. In dry soil. 
170. G. deiceyana Schwein. Rare. 
171. G. cristatella Britton. Abundant in meadows. 
172. G. straminea Willd. In dry soil. 
172. G. festueaeea Willd. Plenty in meadows. 
174. G. hicJcneUii Britton. 
ARACEAE. 
Arisaema. 
175. A. triphyllum (L) Torr. Abundant in moist woods. 
176. A. dracontium (L) Schott. Scarce in rich woods. 
LEMNACEAE. 
Sl’lRODEEA. 
177. S. polyrhiza (L) Schleid. Scarce in ponds. 
Lemka. 
178. L. trisulca L. Common in ponds. 
COMMELINACEAE. 
Tradescantia. 
179. T. virginiana L. Abundant. 
180. T. reflexa Raf. Some rather doubtful specimens apparently 
belong to this species but were too old when found. 
pontederiaceae. 
Heteraathera. 
181. H. duhia (Jacq) MacM. Rare in swamps. 
