Index to Hosts. 
185 
INDEX TO HOSTS. 
Acer dasycarpum, 291. 
Acer saccharinum, 34, 44, 291, 
326, 346. 
AciTda 'tuberculata, 6. 
Actaea, 481. 
Agrimonia Eupatoria, 17, 45, 
281, 396. 
Agropyrum repens, 397. 
Allium Canadense, 349. 
Alnus incana, 44. 
Alopecurus geniculatus, 200. 
Althaea rosea, 296. 
Ambrosia trifida, 48, 256. 
Amelanchier Canadensis, 328. 
Ampelopsis quinquefolia, 297, 
332, 358. 
Amphicarpaea monoica, 303a. 
Andorpogon furcatus, 172. 
Anemone nemorosa, 263. 
Angelica atropurpurea, 331. 
Apios tuberosa, 318. 
Apocynum androsaemifolium, 
322. 
Apples, 340. 
Aquilegia Canadensis. 49, 137. 
Arctostaphylos uva-ursi, 479. 
Aralia, 474. 
Asclepias Cornuti, 299. 
Asclepias incarnata, 299, 399. 
Asclepias phytolaccoides, 299. 
Aspidium Thelypteris, 341. 
Asprella Hystrix, 199. 
Aster corymbosus, 48. 
Aster macrophyllus, 401. 
Aster puniceus, 48. 
Aster sagittifolius, 13, 48, 400. 
Aster Shortii, 450. 
Aster umbellatus, 357. 
Astragalus Canadensis, 49, 372. 
Atriplex patulum, 95. 
Avena sativa, 249. 
Barbarea vulgaris, 373. 
Berberis vulgaris, 336. 
Betula papyrifera, 44, 402a. 
Bctula pumila, 40. 
Bidens chrysanthemoides, 10. 
Bidens frondosa, 242. 
Bromus ciliatus, 170, 199. 
Brunella vulgaris, 374. 
Cakile Americana, 4. 
Oalamogrostis Canadensis, 171, 
199, 494. 
Caloptenus, 486. 
Campanula Americana, 403. 
Cardamine rhomboidea, 16, 126. 
Carex cephaloidea, 405. 
Carex gracillima, 462. 
Carex, 405. 
Carpinus Caroliniana, 40, 345. 
Carya, 44, 77. 
Cassandra calyculata, 480. 
Celastrus scandens, 40. 
Cenchrus tribuloides, 253. 
Ceplialanthus occidentali’s, 278. 
Cerastium, 350, 406. 
Cicuta maculata, 323, 456, 490. 
Claytonia Virginica, 465. 
Clematis Yirginiana, 47, 49, 
317, 482. 
