INDEX. 
Pectis, 148. 
Pedicularis, 141. 
Pentstemon, sp. nov., 79, 161, 200. 
segregate, 223, 
Persicaria, American, 24. 
————_—— amphibious, 24, 26. 
Andrews on, 105, 110. 
New England, 34, 105. 
Pacific, 27, 42-44, 49. 
Rocky Mountain, 29, 30, 40,47. 
Texan, 41. 
Wisconsin, 37, 47, 49. 
Petasites, 180. 
Phacelia, 152. 
Phiox, 152. 
Phyteuma, 61. 
Pleiocardia gen. nov., 85. 
Pneumonanthe, 68. 
Polemonium, 153. 
Polygonaceous genera, 17. 
Polygonatum, 181. 
Porterella and Porteranthus, 204. 
Potamogeton, 24. 
Potentilla, 48, 188, 243. 
Psedera, 220. 
Psychrobatia, gen. nov., 245. 
Ptelea, 222. 
Radicula, 113. 
Rafinesque, genera, 90, 94. 
Ranunculus, 211. 
Rhamnus, 63. 
Rhoeidium gen. nov., 143. 
Rhus, segregates of, 114-144. 
Roripa, 113. 
Rubacer, 210, 230. 
Rubus, 238, 245. 
Rumex, 17. 
— 
Sehmaltzia, Eastern, 128. 
Californian, 139. 
Mexican, 138. 
Rocky Mountain, 131. 
Texan, 133. 
Senecio, 212, 221. 
253 
Serpentaria, 17. 
Sida, 208. 
Sidalcea, 75. 
Sieversia, 4. 
segregates, 174. 
Silene, sp. nov., 75, 153. 
Menziesii, 97. 
Sophia, 96. 
Sphaeralcea, 206. 
Sprengeria gen. nov., 198. 
Streptanthus, 81, 88, 225. 
Swertia 72, 77, 91. 
Taravalia gen. nov., 222. 
Thelypodium, 81, 227. 
Thyrsanthema, 158, 
Tiniaria, 23. 
Torrey, on names, 203. 
Touteria, 209. 
Townsendia, 213. 
Toxicodendron, 114. 
Californian, 119. 
Eastern, 115. 
Mexican, 123. 
Western, 118. 
Southern, 125. 
Texan, 124. 
Japanese, 127. 
Tracaulon, 21. 
Traganthes, 12. 
Tridophyllum, 188. 
Trifolium, 154. 
Tumionella gen. nov., 173. 
Tussilago, 155 
Unamia gen. nov., 6. 
Uncasia gen. nov., 13. 
Uropappus, 213. 
Viola, sp. nov., 2, 184, 247. 
mutations, 182. 
hybrids, 182. 
Virgaria, 5. 
Vitis, 219. 
Washingtonia, 204. 
Wittia, 204. 
