INDEX 



319 



Flowering Plants Continued 



Potentilla: 



Anserina, cinquefoil, 117, 118 

 canadensis, beach cinquefoil, 118 

 fruticosa, shrubby cinquefoil, 183, 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, 2 3 7, 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,rosmweed, 249, 252 



Sisyrinchium angustifolium, blue-eyed 

 grass, 124, 128, 182 



Smilacina racemosa, false Solomon's 

 seal, 124, 128, 129 



Sparganum eurycarpum, bur reed, 

 237, 238 



Spartina Michauxiana, slough grass, 

 244, 246 



Spiranthes Romanzoffiana, fragrant 

 ladies'-tresses, 197, 198 



Sporobolus cryptandrus, 249, 252 



Steironema ciliatum, fringed loose- 

 strife, 273, 275 



Stellaria aquatica, chickweed, 247 



Symphocarpus foetidus, skunk cab- 

 bage, 273, 274 



Tephrosia mrginiana, hoary pea, 132, 



134, !35 

 Thalictrium polygonum, meadow rue, 



266, 267 

 Tradescantia virginica, spiderwort, 



132, 133, 134, 269 

 Trientalis americana, star flower, 124, 



127, 128 

 Trillium: 



grandiflorum, trillium, 92, 209 



recurvatum, 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 

 Uwdaria grandifiora, bellwort, 124, 



126, 130 



Vallisneria, tape grass, 236 

 Verbascum Thapsus, mullein, 119, 120 

 Veronica virginica, Culver's root, 248, 



250 

 Viola: 



blanda, white violet, 179, 248 



canadensis, Canada violet, 138, 

 140, 142, 209 



lanceolata, arrow-leaved violet, 132, 

 135, 182 



palmata, wood violet, 209 



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



pedatafida, 248 



rostrata, long-spurred violet, 138, 



140, 142, 209 



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. maculatum 

 Ginger, wild, As arum canadense 

 Ginseng, Panax trifolium 



