GENERAL INDEX, XV 
Populus heterophylla, L., note on the flowers 
of, Xv., 114. 
Populus, Notes on, xiv., 57. 
Portulaca oleracea, note on, vili., 115. 
Potamogeton Curtisii, n. sp., xlil, 145. 
“ Wrightil, n. sp., xili., *153. 
Potamogetons in W. New York, x., 93. 
Potato, a curious, xiii., *39. 
Potentilla congesta, var. lobata, n. var., xvi., 
221. 
Potentilla laxiflora, n. sp., xvi., 151. 
Preserving Plants for Herbaria, Schwein- 
furth’s method of, xv., 292. 
Presque Isle, flora of, vii., 19. 
Prolification in Daucus, ix., 151. 
‘e “ "rigeron, ix., 141. 
be ** Gratiola, 139, 
5 “ Plantago, ix., 10. 
te * Ranunculus, X., 141. 
* “ Symplocarpus, ix., 10. 
“ “ Verbena, ix., 141. 
“ “ Phleum, xi., 120. 
Prize, de Candolle, xii., 13 
Proterogyny in Spartina, x., 75. 
Protium Bolivianum, spec. nov., Xvi., 189. 
Protoplasm, continuity of, x., 133; xi, 107; 
xil., 55. 2 
Psilocarya nitens (Vabl.), Britton, xv., 101, 
Psilotum triquetrum, new station, ix., 128. 
Ptelea, wingless-fruited, x1., 10. 
Pteridophyta of Litchfield, xi., 7. 
Pteris with caudate pinnules, vii , 114. 
Puccinia, n. sp., xi, 49; xii., 34. 
Purslane, night-closing of leaves, ix., 153. 
Pyrenophora, 0. sp., xi., 28. 
Pyrenothamnia, n. gen. of lichens, X., 22. 
Quercus, n. Sp., X., 91. 
*s_ alba, peculiar leaves in, viil., *126. 
ba “plurality of embryos in, xili., 
*95. 
*¢ — Muhlenbergii, note on, xilii., 40. 
es nigra, xii., 115. 
. ™ — palustris, striped acorns, Ix., 57. 
= polyphylly of gyncecium in, xil., 101. 
‘* _ prinoides, xii., 119. 
«© rubra, aromatic leaves, x1., 117. 
Racomitrium Macounii, n. sp., Xvi., 93. 
Ramalina, 0. sp., X., 43. 
Ramularia, n. sp.,. xi, 122. 
Rangely Lakes, A trip among the, xvi., 263. 
_ Ranunculus aquatilis, var. hispidulus, n. var., 
Xvi., 150. 
~ Cymbalaria, hirsute, viil., 59 
ate petalody of stamens in, vii., 113. 
“ some Californian, xtv., 116. 
Rauia, new genus of the Musci, vii., 16. 
Redfleldia, a new genus of grasses, xiv., *133. 
oe flexuosa, n. sp., xiv., *133. 
Redwood, qualities of, xii., 90. 
Reliquiz Rafinesquiane, xli., 37. 
~— 
Reviews of Foreign Literature, xv., 86, 116, 
129, 169, 194, 237, 268, 320; xvi., 25, 79,113, 
187, 165, 197, 222, 248, 279, 331. 
Rhabdonema Atlanticum, n. sp., xvL, *75. 
Rhexia, fertilization of, vili., *102. 
Rhinotrichum, n. sp., xi., 18. 
Rhizocarpex, The systematic position of, xv., — 
258. 
Rhode Island, floras of, viii., 8. 
Rhododendron of Pontus, xi., 10. 
ss Vaseyi, Another station for, 
XV.. 164. 
be Notes on two, xvi., 220. 
Rhubarb culture, xii., 90. 
Rhus, adventitious leaves in, vii., 91, 98. 
*<  cotinoides, rediscovery of, ix., 153. 
Ricinus, a tree in California, vii , 97. 
Robinia, irritability in, vil., 92. 
Robinson, J. F., death of, xii., 10. 
Reestelia, n. sp., X., 74. 
Rondeletia cordata, note on, Vili., 71. 
Rosa humilis, var. lucida, n. var., xiv., 256. 
ée ate * villosa, n. var., Xiv.. 256. 
“ minutifolia, fruit of, ix., 127. 
“  proliferous, vii., 68. 
‘‘ Remarks on the group Carolinz of the 
genus, xiv., 255; xvi., 161. 
“ new North American, ix., 97. , 
Rosellinia, n. sp, XL, 74. 
Rot, dry, xil., 92. 
Rourea Bakerana, spec. nov., Xvi., 192. 
Rubus, phyllody of calyx in, vii., 56. 
‘*  petallody of stamens in, vii., 68. 
“  fasciation in, x., 48. 
Rudbeckia Missouriensis, xv., 94. 
Sabal umbraculifera, xiv., 72. 
Sagittaria with dark purple flowers, vii , 28. 
Salicornia, note on, vili., 130, 
Salisburia adiantifolia, x1., 134. 
Salix balsamifera, Barratt, xv., 121. 
“ prittle branches of, ix., 82, 89, 90. 
“*  pistillody of stamens in, vil., 55, 56, 
‘¢ stamens within ovary of, vill., 76. 
** synopsis of Northern species, vii., 89. 
Salviniaces, xv., 261. 
Sam’s Point, N. Y., flora of, x., 105, 121. 
San Francisco Peninsula, changes in plant- 
life, vii., 35. 
Sanguinaria Canadensis, notes on, xiv., *74. 
Sarracenia, hexamerous, vii., 83. 
Sarracenia variolaris, note on, xiv., 229. 
Sassafras tree, a large, vii., 67. 
Saurauja Rusbyi, spec. nov., xvL, 64. 
Savoyanne, the word, xii., 72. 
Saxifraga, petalody of stamens in, vil., 69. 
“ Virginiensis, some anomalous 
forms of, xiv., 122, 
sa Virginiensis, var. pentadecandra, 
n. Var., Xiv., 124; Xv., 166. 
Scirpus heterocarpus, xv., *103. 
