Index to Hosts. 
187 
Iris versicolor, 295. 
Juglans cinerea, 77. 
Juglans, 77. 
Juncus nodosus, 67. 
Juncus tenuis, 154. 
Juniperus Virginiana, 315. 
Xactuca Floridana, 45. 
Xactuca Scariola, 421. 
Xappa, 422. 
Xathyrus ochroleucus, 37, 277. 
Xathyrus venosus, 277. 
Xedum latifolium, 476. 
Xespedeza, 89, 376. 
Xobelia cardinalis, 424. 
Xobelia inflata, 424. 
Xobelia spicata, 424. 
Xobelia syphilitica, 424. 
Xonicera glauca, 38. 
Xonicera obiongifolia, 352. 
Xonicera Sullivantii, 298. 
Xonicera, 298-352. 
Xudwigia palustris, 425. 
Xychnis vespertina, 427. 
Melilotus alba, 300. 
Mentha Canadensis, 192. 
Mimulus ringens, 428. 
Mitella diphylla, 469. 
Muskmelon, 413. 
Negundo aceroides, 334 
Nepeta cataria, 429. 
Onoclea sensibilis, 341. 
Osmorrhiza longistylis, 191, 
306, 395. 
Osmorrhiza, 384. 
Ostrya Virginica, 44, 430a. 
Oxalis, 382. 
Pseony, 432. 
Pea, 293. 
Pedicularis lanceoiata, 45. 
Pentstemon pubescens, 307. 
Phleum pratense, 392. 
Phlox divaricata, 48, 139, 305. 
Phragmites communis, 393. 
Phryma Xeptostachya, 423. 
Physostegia Virginiana, 434. 
Pilea pumila, 435. 
Pimpinella integerrima, 310. 
Pisum sativum, 293. 
Plantago major, 436. 
Plantago Rugelii, 21, 80. 
Poa, 199. 
Podophyllum peltatum, 69, 437. 
Polygonum aviculare, 387. 
Polygonum Hydropiper, 311. 
Polygonum Muhlenbergii, 387 
Polygonum, 311. 
Polymnia Canadensis, 242. 
Populus angulata, 31. 
Populus tremuloides, 31, 275, 
354. 
Potentilla anserina, 82. 
Potentilla palustris, 281, 343. 
Prenanthes alba, 45. 
Prenanthes, 438. 
Proserpinaca palustris, 468. 
Prunua serotina, 117, 367, 369. 
Prunus Virginiana, 274, 342. 
Ptelea trifoliata, 440. 
Pyrus coronaria, 43, 244, 309, 
353, 368. 
Quercus alba, 41, 337, 366. 
Quercus macrocarpa, 41, 337. 
Quercus palustris, 41. 
Quercus rubra, 351. 
Ranunculus abortivus, 394. 
Ranunculus fascicularis, 272. 
Ranunculus recurvatus, 272. 
Ranunculus repens, 78, 261. 
Rhamnus alnifolia, 485. 
Rhus glabra, 441. 
Ribes aureum, 402. 
Ribes floridum, 282, 344. 
Ribes oxyacanthoides, 227. 
Ribes, 144, 344. 
