221 



Pinus strubtts 154. 164. 

 Pinweed. I'M 

 I'.psissewa. 197. 

 Plane tree, 166 

 Plantago major, 158, 

 ;» (/./,. L6Q 



Plantain, 169, 160, 170, 174, 208, 211. 

 Plants of Winneshiek county, 147. 

 riatnnus occidentaHs, 186. 

 By-root, 198. 



I'limi. lv 



Poa pratetuia, 160, 167. 



I'oilniilii/lhni' pritiilinii, 168, 162, 183 

 Poison ivy. 192. 



Potentate trachyspermo, 185. 

 Pnlcnuiniuni rcptans, 158, 199. 

 Polypate siiiifiainea, 192. 

 s< n(7/(7, 162, 192. 

 rcrticillata, 191. 

 viridsccns, 192. 

 Polygonum atnphibium, 179. 

 aviculare, 179. 

 camporum, 179. 

 ftHtroliulus, 159. 180 

 douglassii, 180. 

 dumctorum, ISO. 

 emersum, 179. 

 hydropipcr. 179. 

 incarnation. 179. 

 lapathifohum. 179. 

 mulili'nbergii, 179. 

 pcnnsylvanicum, 16n. 179. 

 persicaria, 179. 

 sagittatum. 180. 

 scandens, 180. 

 (enue, 180. 

 virginianum, 180. 

 Polytnnia canadensis, 209. 



uvedalia, 209. 

 Polypodium vulgar e, 163. 

 Polypody, 163. 

 Pondweed, 170. 

 Poplar, 155, 156, 174. 

 Po-pulns alba, 174 



balsamifcra. 174 

 candicans, 154, 174. 

 deltoides, 153, 174. 

 grandidentata, 154. 171 

 monilifera. 174. 

 tremuloidcs, 154, 174. 

 Portulaca oleracea. 159, 181. 

 Potamogeton fluitans. 170. 

 foliosus, 170. 

 lonchites, 170. 

 pauciflorus, 170. 

 Potato vine, wild, 198. 

 Potentilla arguta, 187. 



canadensis. 187. 

 fruticosa, 187. 

 monspeliensis, 187. 



norvcgica, 187. 

 Iridentata, 187. 

 Prenanthcs alba, 205. 



racemo.vu, 20r. 

 Primrose, evening, 160. 195. 

 Prunella vulgaris, 201. 

 Primus amen* una. 189. 



p< iinsiili (tnica, 155, 189. 

 pumila, 153, 189. 

 serotimi. 154, 162, 189. 

 viriliniana, 154, 162 

 Ptciiiiiuin aqvilinum, 164. 

 I'tcris aguilina, lo4. 

 Puccoon, 200. 



Pulsatilla liirsiitissima. 157. 161, IK!!. 

 Purslane, 159, 181, 192. 

 Putty root, 174. 



Pycnanthemum lanceolatum, 201. 

 linifoliu m. 201. 



- nipt i< a, l <* t. 

 secunda, 197. 

 Pyrtts arbutifolia, 188. 

 coronaria, 188. 



Querctts rtZ/Ja, 154, 162. 177. 

 borealis, 177. 

 coccinca. 177. 

 macrocarpa, 177. 



rMfo/Y/, 154, 17.. 

 s'/nirrkii. 176. 

 texana, 176. 



rclutiiia. 177. 



Ragweed. 160, 206. 

 Ranunculus abortivus, 183 

 aquatiUs, 183. 

 fascicularis. 157. 183. 

 ovalis, 183. 

 pfitnsplvanit us. 183. 

 ra urratus, 183. 

 rhomboideus, 183. 

 septentrionahs. 183. 

 Raspberry. 154, 161. 186. 

 Ratibida pinnata. 209. 

 Red-root, 154, 193. 

 Red-top, 166. 

 Reed-grass, Indian, 166. 

 Reforestation, method of, 15.'. 

 ff/u<.9 glabra. 154. 161, 192. 

 hirsuta. 154, 192. 

 radicans. 153, 161. 192. 

 toxicodendron. 161. 192, 

 ti/phina. 192. 

 Ribes 'i/ixjsixiti. 153, 186. 

 rloridum. 153, 186. 

 gracile. 186. 

 missouriensis. 153, 186. 

 rubrion, 155, 186. 

 Rice, mountain. 166. 



