Lake Maxinkuckee, Physical and Biological Survey l'.»l 



Orpine Family, 322. 

 Orthoptera, Order, 27. 

 oryzoides, Homalocenchrus, 229. 

 Oscillatoria major, 144. 



tenuis, 143. 

 Osmundaceae, 199. 

 Osmunda cinnamomea, 199. 



claytoniana, 200. 



regalis, 199. 

 Ostrya virginiana, 281. 

 ovalis, Amphora, 163. 

 ovata, Hicoria, 273. 

 Ovate-leaved Violet, 369. 

 Oxalidaceae, 348. 

 Ox-eye, 437. 

 Ox-eye Daisy, 445. 

 oxyacanthoides, Grossularia, 326. 

 Oxycoccus macrocarpus, 387. 

 Oxypolis rigidus, 379. 



Pachydiplax longipennis, 16. 

 Padus nana, 336. 



virginiana, 337. 

 Paint-brush, Indian, 413. 

 Painted-cup, Scarlet, 413. 

 Palaemonetes exilipes, 78. 

 Pale Persicaria, 294. 



Plantain, 446. 



Touch-me-not, 349. 

 Pale-leaved Wood Sunflower, 440. 

 pallens, Sphenopholis, 236. 

 pallida, Impatiens, 349. 

 pallidus, Lepomis, 80. 

 palmata, Coreopsis, 440. 



Viola, 368. 

 palustre, Comarum, 330. 

 palustris, Caltha, 309. 



Dirca, 370. 



Eleocharis, 189, 242. 



glaucescens, Eleocharis, 189. 



Isnardia, 371. 



Lathyrus, 344. 



Proserpinaca, 374. 



Quercus, 284. 



Radicula, 317. 



Scheuchzeria, 219. 



Stachys, 404. 

 Panax quinquefolium, 376. 



trifolium, 377. 

 pandurata, Ipomoea, 347, 396. 

 Panic-grass, Barbed, 226. 



Panic-Grass, Scribner's, 226. 



Velvety, 227. 

 Panicled Cornel, 382. 



Tick-trefoil, 342. 

 Panicularia nervata, 237. 



septentrionalis, 2:!7. 

 paniculata, Meibomia, 342. 

 Panicum capillare, 225. 



microcarpon, 226. 



scoparium, 227. 



scribnerianum, 226. 



virgatum, 226. 



Tall Smooth, 226. 

 Papaveracese, 317. 

 Paper-shell, 60. 

 Papilio glaucus turnus, 38. 



marcellus, 38. 



polyxenes, 38. 



troilus, 38. 

 papilionacea, Viola, 369. 

 paradoxa, Cuscuta, 397. 

 parallelus, Helicodiscus, 75. 

 Parasites, Copepod, 79. 



Enemies and diseases of Mussels, 

 49. 

 Parasitic Copepods, 77. 

 parasitica, Placobdella, 92. 

 parietina, Prasiola, 155. 

 Parks, Chicago, 324. 



Washington, D. C, 324. 

 Parnassiacese, 323. 

 Parnassia caroliniana, 323. 

 Parrot's Feather, 375. 

 Parsnip, Hairy-jointed Meadow. 379. 



Wild, 378. 

 Parthenium integrifolium, 437. 

 Parthenocissus quinquefolia, 3<>". 

 Partridge Pea, 338. 

 Partridge-berry, 418. 

 parva, Dina, 95. 

 parviflora, Agrimonia, 331. 



Galinsoga, 444. 

 parvus, Planorbis, 73. 

 Pastinaca sativa, 378. 

 Pasture Rose, 333. 

 patens, Aster, 433. 

 patula, Solidago, 430. 

 pauciflora, Strophostyles, 348. 

 paupercula, Agalinis, 412. 

 pauperculum, Pisidium, 7 1. 



crystalense, Pisidium, 74. 



