INDEX 



319 



Flowering Plants — Continued 



— Potent ilia: 



Anscrina, cinquefoil, 117, 118 

 canadensis, beach cinquefoil, 118 

 fruticosa,shYnhhycmqueio\\,i8j,iS4 



— Prcnanthes alba, rattlesnake root, 

 138, 140, 142, 264, 269 



— Proserpinaca palustris, mermaid 

 weed, 247, 248 



— Ranuncidus aqtiat His, water buttercup, 

 102, 236 



— Rudheckia hirta, brown-eyed Susan, 

 248, 251 



— Sagittaria latifolia, arrowhead, 2 3 7, 238 



— Sanguinaria canadensis, q2, 209 



— Sarracenia purpurea, pitcher plant, 

 iq8, 199 



— Saxifraga pennsyhanica, swamp saxi- 

 frage, 178, 180 



— Scirpus: bulrush or club rush 

 atrovircns, 235, 237 

 Torreyi, 235, 237 

 validus, 23 s, 2J7 



— Scutellaria galericulata, skull cap, 247, 

 248 



— Silphium: 



laciniatum, compass plant, loi 

 perfollatum, cup plant, 107, 108 

 terebinthinaceum,Yo^in\veed, 249, 252 



— Sisyrinchiuni angustifolium, blue-eyed 

 grass, 124, 128, 182 



— Smilacina racemosa, false Solomon's 

 . seal, 124, 128, i2g 



— Sparganium eurycarpum, bur reed, 

 237, 238 



— Spartina Michauxiana, slough grass, 

 244, 246 



— Spiranthes Romanzoffiana, fragrant 

 ladies'-tresses, 197, 198 



— Sporobolus cryptandrus, 249, 252 



— Steironema ciliatnm, fringed loose- 

 strife, 273, 275 



— SymphocarpHS foetidus, skunk cab- 

 bage, 273, 274 



— Tcphrosia virginiana, hoary pea, 132, 



134, 135 

 — Thaliclniim dasycarpum, meadow rue, 



266, 267 



— Tradescantia virginica, spiderwort, 



132, 133, 134, 269 

 — Trientalis americana, star flower, 1 24, 



127, 128 

 — Trillium: 



grandiflorum , triUium, 92, 209 _ 



recurvatiim, red or purple trillium, 

 92, 209 



— Typha: 



angustifolia, narrow-leaved cat- tail, 



lOI 



latifolia, cat-tail, lor, 238 

 — Utricularia vulgaris, bladdcrwort, 



102, 103, 178, 236 

 — Uvularia gratidijlora, bellwort, 124, 



126, I JO 

 — 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 



palmata, wood ^'iolet, 209 



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



pedatafida, 248 



rostrafa, long-spurred violet, 138, 

 140, 142, 209 



sagittata, arrow-leaved violet, 132, 

 135, 182 

 — Xant Ilium echinatum, cocklebur, 118 

 — Xyris caroloniana, 3'cllow-e}'ed grass, 



182 

 — Zizania aquatica, \\'ild 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, 5 ^ 53 



Frost, 27 



Fracture, yo 



Fraction Run, 3, 8 



Frog, hibernation of, 105 



Frogs, s.ce Amphibians 



Frogs' eggs, 94 



Gabbro, 7S, 76 



Galena-Platteville limestone, 34, 38, 46, 



52, 54 

 Galenite, 68, 7/ 



Galls of oak, 1O3, 164 



Gentian, Gentiana Andrcicsii 



Geologic ages, 30 



Geranium, wild, Geranium carol in ia- 

 num; G. maculotum 



Ginger, wild, Asarum canadensc 



Ginseng, Panax Irifolium 



