240 



GEOLOGY OF OHIO. 



Melanthium, 512. 

 Melastornace-Ae, XXXVI. 

 Melica, 580. 

 Melilotus, 303. 

 Melissa, 95. 



Menispermaceae, LXXVIII. 

 Menispermum, 387. 

 Mentha, 86. 

 Menyanthes, 1T8. 

 Mertensia, 118. 

 Micrampeles, 65. 

 Microstylis,, 473. 

 Milium, 554. 

 Mimulus, 141. 

 Mitchella, 79. 

 Mitella, 346. 

 Mohria, 183. 

 Mollugo, 430. 

 Monarda, 97. 

 Moneses, 207. 

 Monotropa, 192. 

 Monotropaceae, XXX. 

 Moraceae, XCVI. 

 Morus, 449. 

 Muhlenbergia, 555. 

 Muscari, 499. 

 Myosotis, 119. 

 Myrica, 469. 

 Myricaceae, CHI. 

 Myriophyllum, 283. 



n 



Naias, 601. 

 Napaea, 264. 

 Nasturtium, 35S. 

 Neckeria, 377. 

 Negundo, 280. 

 Neillia, 325. 

 Nelumbo, 417. 

 Nemopanthes, 276. 

 Nepeta, 100. 

 Nesaea, 249. 

 Nicaudra, 156. 

 Nigella, 402. 

 Nuphar, 415. 



Nyctaginaceae, LXXXVII. 

 Nymphaeaceae, LXXXIV. 

 Nymphaea, 415. 

 Nyssa, 239. 



Oakesia, 504. 

 Obolaria, 176. 



Oenothera, 242. 

 Oldenlandia, 77. 

 Oleaceae, XXVI. 

 Onagraceae, XXXV. 

 Onopordon, 49. 

 Onosmodium, 120. 

 Opuntia, 253. 

 Orehidaceae, CVI. 

 Orchis, 484. 

 Origanum, 91. 

 Orobanchaceae, XVII. 

 Oryzopsis, 553. 

 Osmorrhiza, 223. 

 Ostrya, 463. 

 Oxalidaceae, LXII. 

 Oxalis, 295. 

 Oxybaphus, 433. 

 Oxycoccus, 195. 

 Oxydendrum, 199. 

 Oxypolis, 232. 



Panax, 237. 

 Panicum, 542. 

 Papaver, 379. 

 Papaveraceae, LXXV. 

 Parietaria, 458. 

 Parnassia, 349. 

 Parthenium, 21. 

 Paspalum, 541. 

 Passiflora, 254. 

 Passifioraceae, XLI. 

 Pastinaca, 231. 

 Pedaliaceae, XVI. 

 Pedicularis, 152. 

 Peltandra, 527. 

 Penthorum, 355. 

 'Pentstemon, 139. 

 Peramium, 480. 

 Periploca, 165. 

 Petalostemon, 306. 

 Phacelia, 124. 

 Phalaris, 548. 

 Phaseolus, 318. 

 Philadelphus, 351. 

 Phleum, 557. 

 Phlox, 160. 

 Phoradendron, 416. 

 Phragmites, 574. 

 Phylianthus, 286. 

 Phryma, 83. 

 Physalis, 155. 

 Physostegia, 103. 

 Physocarpus, 325. 



