518 
Switchtail, 328 
Symphoricarpos orbiculatus, 400, 438 
Synchita parvula (associated with oak wilt), 
305-6 
Synthyris bullit, 401, 422, 437, 441 
7 
Tachinus (associated with oak wilt), 305-6 
Taenidia, 433; see also Taenidia integerrima 
Taenidia integerrima, 421, 433 
Tail, mule, 439; see also Erigeron canadensis 
Tea, New Jersey, 432; see also Ceanothus 
americanus 
Tenebrionidae (associated with oak wilt), 
305-6 
Tenebroides laticollis (associated with oak 
wilt), 305-6 
Tephrosia virginiana, 413, 419, 431 
Teucrim canadense, 436 
Thimbleweed, 429; see also Anemone virgin- 
iana 
Thoroughwort, tall, 439; see also Eupatorium 
altissimum 
Tick-clover, 430; see also Desmodium cana- 
dense 
Illinois, 430; see also Desmodium illinoensis 
sessile-leaved, 430; see also Desmodium ses- 
silifolium 
Ticklegrass, 415; see also Agrostis hiemalis 
Tickweed, 441 
Torilis japonica, 434 
Tradescantia, 393 
canaliculata, 426 
ohiensis, 417, 426 
virginiana, 417, 426 
Tragopogon 
dubius, 441 
major, 441 
pratensis, 441 
Trap, basket, 326, 329, 333-7, 343-5, 347, 364-5 
Trichocera (associated with oak wilt), 305-6 
Trichoceridae (associated with oak wilt), 
305-6 
Trichoderma (associated with oak wilt), 285 
Tridens flavus, 388, 398, 400, 417, 426 
Triodia flava, 426 
Triosteum perfoliatum, 438 
Trout 
cypress, 328 
green, 329 
Trumpet-creeper, 437 
Typha latifolia, 228 
U 
Uleiota dubia (associated with oak wilt), 305-6 
Ulmaceae, 428 
Ulmus 
alata, 428 
rubra, 428 
Umbelliferae, 421, 433 
Umbrella-wort, 428; see also Mirabilis nycta- 
ginea 
Uniola, broadleaf, 426 
Uniola latifolia, 426 
Ustulina vulgaris, 279 
ILLinois NATURAL History SurvEY BULLETIN 
Volume 26 
Vv 
Vaccinium 
arboreum, 413, 434 
vacillans, 434 
Vegetation, aquatic, 222 
Verbascum thapsus, 402-3, 437 
Verbena 
bracteata, 436 
canadensis, 421, 436 
simplex, 421, 436 
stricta, 392, 400, 421, 436, 442 
Verbenaceae, 421, 436 
Verbesina 
helianthoides, 441 
virginica, 441 
Vernonia 
baldwini, 424, 441 
missurica, +07, 424, 441 
Veronica 
arvensis, 437 
peregrina, 422, 437 
Veronicastrum virginicum, 422, 437 
Vervain, 436; see also Verbena bracteata and 
V. canadensis 
hoary, 436; see also Verbena stricta 
narrow-leaved, 436; see also Verbena sim- 
plex 
Viburnum rufidulum, 413, 438 
Viola 
kitaibeliana var. rafinesquti, 433 
pedata, 421, 433 
rafinesquil, 421, 433 
Violaceae, 421, 433 
Violet, bird-foot, 433; see also Viola pedata 
Vitaceae, 433 
Vitis spp., 414, 433 
Wafer-ash, 431 
Walleye, 329 
yellow, 329, 332, 340 
Walnut, black, 427; see also Juglans nigra 
Warmouth, 217, 236-40, 242-4, 250, 273-4, 329, 
341, 359 
Wedgegrass, prairie, 426; see also Sphenopho- 
lis obtusata 
Whitetop, 439; see also Erigeron annuus 
Whitlowcress, 429; see also Draba reptans 
Wild-rye 
Canada, 425; see also Elymus canadensis 
Virginia, 228, 425; see also Elymus virgini- 
cus 
Willow 
prairie, 427; see also Salix humilis 
sandbar, 228 
Witchgrass, 425; see also Panicum capillare 
fall, 425; see also Leptoloma cognatum 
Wood-betony, 437 
Woodpecker (associated with oak wilt), 318 
Wood-sage, 436 
Wood-sorrel 
upright yellow, 431; see also Oxalis stricta 
violet, 431; see also Oxalis violacea 
Worm, catalpa, 267 
Wormwood, 438; see also Artemisia caudata 
causa 
= re 
