Monarda allophylla, iv, 56. ---- Bradburiana, x, 260. ---- scabra, x, 260. Mosses and Ferns of the United States, by _L. C. Beck_, xv, 287. Mucedinea, on vines, xxix, 367. Muhlenbergia filipes, xliv, 83. Mylocarium ligustrinum, xxvi, 319. Myosotis inflexa, xlvi, 98. ---- macrosperma, xlvi, 98. ---- stricta, xlvi, 98. ---- verna, xlvi, 97. Myosurus Shortii, i, 379. Myrrhis canadensis, xi, 175. ---- longistylis, xi, 175. Nelumbium luteum, iv, 64. Nemopanthus, i, 377. Nemostyles cælestina, xlix, 130. ---- gemmiflora, xlix, 131. Neottia gemmipara, xlvii, 185. Oakesia Conradii, xlv, 215. Œnothera sinuata, xi, 180. Olea americana, northern limit of, _H. B. Croom_, xxvi, 315. Oligostachyum, iv, 58. Orchis tribe, synonymy of some species of, _A. Gray_, xxxviii, 306. Orchis spectabilis, monstrous flower of, _J. W. Bailey_, xxxv, 117.^f Oxyria reniformis, xlv, 29. Panicum longisetum, iv, 58. Passiflora Warei, v, 297. Peaches growing on an almond tree, ii, 363. Penstemon Nuttalli, xiv, 120. Petalostemon roseum, v, 298. ---- villosum, iv, 66. Peucedanum ternatum, xxviii, 165. Phacelia brevistylis, xlv, 172. ---- fimbriata, xlv, 171. ---- Purshii, xlv, 171. ---- pusilla, xlv, 172. Philadelphus hirsutus, xlix, 130. Phalangium esculentum, iv, 60. Phlox bifida, xi, 170. ---- divaricata, xi, 169. ---- glutinosa, xlv, 177. ---- pilosa, xi, 169. Physalis pubescens, xi, 170. Piper leptostachyum, v, 287. Planera or Siberian elm, xx, 377. Plumbago floridana, v, 290. Poa modesta, xlv, 45. Polanisia, i, 378. Potamogeton Claytoni, xlv, 38. ---- pulcher, xlv, 38. Potentilla supina, xiv, 114. Prenanthes aphylla, v, 299. Primula farinosa, iv, 59. Prinos coriaceus, v, 293. Prosartes maculata, xlvii, 201. Protococcus kermesinus, analogies of, with the red particles of the blood, xxxvi, 206. Prunus pennsylvanica, xiv, 112. Psychotria lanceolata, v, 290. Pteris alabamensis, xlv, 177. Pycnanthemi, conspectus of, xlii, 44. Pycnanthemum albescens, xlii, 45. ---- aristatum, xlii, 44. ---- clinopodioides, xlii, 45. ---- dubium, xlii, 45. ---- hyssopifolium, xlii, 44. ---- incanum, xlii, 45. ---- lanceolatum, xlii, 46. ---- linifolium, xlii, 46. ---- montanum, xlii, 47. ---- muticum, xlii, 46. ---- nudum, xlii, 47. ---- pilosum, xiv, 117; xlii, 46. ---- Torrei, xlii, 46. ---- Tullii, xlii, 45. Rafflesia, iii, 377. Ranunculus, new species, near collinus, xiv, 116. Rosa rubifolia, xiv, 113. Rottböllia ciliata, i, 357. ---- corrugata, i, 355. Ruellia ciliosa, xiv, 119.