516 Ittinois NaruraAL History SURVEY BULLETIN 
Quercus—continued 
marilandica, 428 
montana, +13 
muhlenbergii, 397, 410, 413, 428 
stellata, 413, 428 
velutina (oak wilt of), 280; 423 
Quillback, 328 
R 
Ragweed 
common, 438; see also Ambrosia elatior 
giant, 438; see also Ambro ia tri{da 
west’rn, 438; see also Ambrosia coronopi- 
folia 
Ragwort, 440; see also Senecio pauperculus 
prairie, 440 (see Emendations, reference for 
p. 440); see also Senecio plattensis 
Ranunculaceae, 418, 428 
Ranunculus fascicularis, 419, 429 
Raspberry, black, 430 
Ratibida pinnata, 424, 440 
Rattlebox, 430; see also Crotalaria sagittalis 
Reboulia hemisphaerica, 414, 416 
Redbud, 430; see also Cercis canadensis 
Redhorse, 340, 358 
common, 328 
northern, 328 
silver, 328 
Reefer, 328 
Rhamnaceae, 420, 432 
Rhizophagidae (associated with oak wilt), 
305-6 
Rhizophagus bipunctatus (associated with oak 
wilt), 305-6 
Rhus 
aromatica, 388-9, 393, 420, 432 
aromatica var. arenaria, 420, 432 
copallina, 388-9, 420, 432 
glabra, 392, 396, 392-9, 401, 405-6, 420, 432 
radicans, 432 
Ribes missouriense, 429 
Roach, 328 
Robinia pseudo-acacia, 431 
Rock-cress, 429 
Rodent (associated with oak wilt), 280, 310 
Rooter, 328 
Rosa 
arkansana var. suffulta, 430 
carolina, 419, 429 
setigera, 430 
suffulta, 419, 430 
Rosaceae, 419, 429 
Rose, 430; see also Rosa 
climbing, 430 
pasture, 429; see also Rosa carolina 
Rose-pink, 435; see also Sabatia angularis 
Rosinweed, 440; see also Silphium integrifo- 
lium 
Rotifers, 229 
Rubiaceae, 423, 437 
Rubus 
flagellaris, 430 
frondosus, 430 
occidentalis, 430 
Rudbeckia 
hirta, 440 
Volume 26 
missouriensis, +14, 423, 440-1, 443 
serotina, 423, 440 
Ruellia, hairy, 437; see also Ruellia humilis 
Ruellia humilis, 388-9, 392, 422, 437 
Rush, 426; see also Juncus dudleyi 
Rutaceae, 431 
S 
Sabatia angularis, 421, 435 
Sage, blue, 436; see also Salvia pitcheri 
Sagittaria 
latifolia, 228 
spp., 228 
Salicaceae, 418, 427 
Salix 
humilis, 393, 418, 427 
interior, 228 
Salmon, jack, 329 
Salvia 
azurea var. grandiflora, 436 
pitcheri, 422, 436, 441 
Sandpike, 329 
Santalaceae, 418, 428 
Saponaria officinalis, 428 
Sassafras, 412-3, 429; see also Sassafras albi- 
dum 
Sassafras albidum, 405, 413, 429 
Sauger, 329, 332, 340, 358, 362-4 
eastern, 329 
Saxifragaceae, 419, 429 
Scaphirhynchus platorynchus, 328; see also 
Hackleback; Sturgeon, sand and shoy- 
elnose; Switchtail 
Scirpus atrovirens, 228 
Scolytidae (associated with oak wilt), 305-6, 
309, 318 
Scouring-rush 
smooth, 415; see also Equisetum 
tall, 415; see also Equisetum 
Scrophularia marilandica, 437 
Scrophulariaceae, 422, 437 
Scutellaria 
leonardi, 422, 436 
ovata, 422, 436 
parvula, 422, 436 
parvula var. leonardi, 436 
Sedge, 228, 426; see also Carex 
Seine, 326, 329, 331-3, 364-5 
Selaginella, rock, 414; see also Selaginella 
rupestris 
Selaginella rupestris, 401, 414, 416 
Selaginellaceae, 414, 416 
Selfheal, 436 
Semotilus atromaculatus, 237; see also Chub, 
creek 
Senecio 
pauperculus, 424, 440 
plattensis, 378, 383, 387-9, 393, 404-5, 423, — 
440 (see Emendations, reference for 
p. 440) 
Serviceberry, 429 
Setaria 
glauca, 425 
lutescens, 425 
viridis, 405, 425 
Scymeria macrophylla, 437 
