INDEX 



319 



Flowering Plants Continued 



Potentilla: 



Anscrina, cinquefoil, 117, 118 

 canadensis, beach cinquefoil, 118 

 frulicosa, shrubby cinquefoil, 1^3,184 



Prenanthes alba, rattlesnake root, 

 138, 140, 142, 264, 269 



Proserpinaca palustris, mermaid 

 weed, 247, 248 



Ranunculus aquatilis, water buttercup, 

 102, 236 



Rudbeckia hirta, brown-eyed Susan, 

 248, 251 



Sagittaria latifolia, arrowhead,237, 238 



Sanguinaria canadensis, 92, 209 



Sarracenia purpurea, pitcher plant,. 

 198, 199 



Saxifraga pennsyhanica, swamp saxi- 

 frage, 178, 1 80 



Scirpus: bulrush or club rush 

 atrovirens, 235, 237 

 Torreyi, 235, 237 

 validus, 235, 237 



Scutellaria galericulata, skull cap, 247, 

 248 



Silphium: 



laciniatum, compass plant, 101 

 perfoliatum, cup plant, 107, 108 

 terebinthinaceum, rosinweed, 249, 252 



Sisyrinchium angustifolium, blue-eyed 

 grass, 124, 128, 182 



Smilacina racemosa, false Solomon's 

 .seal, 124, 128, 129 



Sparganium eurycarpum, bur reed~, 

 237, 238 



Spartina Michauxiana, slough grass, 

 244, 246 



Spiranthes Romanzoffiana, fragrant 

 ladies'-tresses, 197, 198 



Sporobolus cry ptandrus , 249, 252 



Steironema ciliatum, fringed loose- 

 strife, 273, 275 



Symphocarpus foetidus, skunk cab- 

 bage, 273, 274 



Tephrosia mrginiana, hoary pea, 132, 

 134, 135 



Thaliclnum dasycarpum, meadow rue, 

 266, 267 



Tradescantia virginica, spiderwort, 

 132, 133, 134, 269 



Trientalis americana, star flower, 124, 

 127, 128 



Trillium: 



grandiflorum, trillium, 92, 209 

 recnrvatum, red or purple trillium, 

 92, 209 



Typha: 



angustifolia, narrow-leaved cat- tail, 

 101 



latifolia, cat-tail, 101, 238 

 Utricularia vulgaris, bladderwort, 



102, 103, 178, 236 

 Uvularia grandiflora, bellwort, 124, 



126, jjo 



Vattisneria, tape grass, 236 

 Verbascum Thapsus, mullein, 119, 720 

 Veronica virginica, Culver's root, 248, 



250 

 Viola: 



blanda, white violet, 179, 248 



canadensis, Canada violet, 138, 

 140, 142, 209 



palmata, wood violet, 209 



pedata, bird's-foot violet, 132, 135 



pedatafida, 248 



rostrata, long-spurred violet, 138, 

 140, 142, 209 



sagittata, arrow-leaved violet, 132, 



135, 182 



Xanthium echinatum, cocklebur, 118 

 Xyris caroloniana, yellow-eyed grass, 



182 



Zizania aquatica, wild rice, 237, 238 

 Zizia aurea, golden old man, 248, 250 

 Fold of rock in Illinois, 52, 54 

 Food supply and distribution, 106 

 Fore-dune association, 115, 119 

 Forest margin association, 228, 261 

 Forest succession, 202 

 Fossils, 28, 49, 51, 53 

 Frost, 27 

 Fracture, 70 

 Fraction Run, 3, 8 

 Frog, hibernation of, 105 

 Frogs, see Amphibians 

 Frogs' eggs, 94 



Gabbro, 75, 76 



Galena-Platteville limestone, 34, 38, 46, 



52, 54 



Galenite, 68, 71 

 Galls of oak, 163, 164 

 Gentian, Gentiana Andrewsii 

 Geologic ages, 30 

 Geranium, wild, Geranium carolinia- 



num; G. maculatttm 

 Ginger, wild, Asarum canadense 

 Ginseng, Panax trifolium 



