INDEX TO YOL. lY. 



Abronia Cnix-Maltse, 253. 



cycloptera, 253. 



niicrantha, 253. 

 Acanthophora Delilei, 237. 



luuscoides, 237. 

 Acerates, 66, 72. 



angustifolia, 72. 



auiiculata, 72. 



lanuginosa, 73. , 



longifolia, 73. 



paniculata, 66. 



tomentosa, 73. 



viridiflora, 73. 

 Acid, Diamido-sulphobenzide-di- 

 carbonic, 205. 



Parabro m alph atoluylic , 223 . 

 Air, Effect of Temperature on Vis- 

 cosity of, 41. 

 Alga, Xew, of California, 245. 

 Algpe, on some new to the United 



States, 235. 

 Amarantus albus, 274. 



blitoides, 273. 



Blitum, 273. 



firabriatus, 274. 



Greggii, 274. 



obovatus, 275. 



Palmeri, 274. 



Torreyi, 274. 



AVrigbtii, 275. 

 Amblogyne, 274. 

 Ammonic parabromalphatoluate, 



224. 

 Amphidium molybdoplaciim, 182. 

 Amphiroa Californica, 238. 



cuspidata. 239. 



debilis, 239. 



fragilissima, 239. 



nodulosa, 239. 



Orbigniana, 238. 



Amphiroa Triliulus, 239. 



tuberculosa, 239. 



vertebralis, 239. 

 Amsonia brevifolia, 64. 



longifiora, 64. 



Palmeri, 64. 



tomentosa, 64. 

 Anautherix, 66. 



connivens, 66. 



decumbens, 66. 



paniculatus, 66. 



viridis, 66. 

 Angelica leporina, 252. 

 Antigeny, or Sexual Dimorphism, 



in Butterflies, 150. 

 Antirrhinimi chytrospermum, 81. 



cyathiferum, 81. 

 Appropriations, 279, 283. 

 Arctomecon, Character of, 52. 

 Arctostaphylos Clevelandi, 61. 

 A]-gentic parabromalphatoluate, 



224. 

 Arsenite of Copper, Experiments 



upon, 11. 

 Asclepias, 65. 



anioena, 67. 



amplexicaulis, 67. 



angustifolia, 70, 71, 72. 



arenaria, 68. 



brachystephaija, 68. 



cinerea, 72. 



Cornuti, 67. 



Coulteri, 71. 



cryptoceras, 67. 



Curassavica, 66. 



debilis, 70. 



Douglasii, 67. 



eriocarpa, 68. 



erosa, (iS. 



fascicularis, 71. 



Feayi, 72. 



Fremonti, 68. 



