Sabal Adansoni, xxvi, 315. ---- hystrix, v, 293. ---- minima, v, 293. Salix ambigua, xlv, 35. ---- Cutleri, xlv, 36. ---- myrtilloides, xlv, 34. ---- phylicifolia, xlv, 35. Sanguinaria canadensis, xlix, 130. Sanicula marilandica, xi, 174. Sarracenia, remarks on the genus and species of, _H. B. Croom_, xxvi, 316. ---- pulchella, xxv, 75. Saxifraga Careyana, xlii, 32. Schænus effusus, northern limit of, _H. B. Croom_, xxvi, 315. Scutellaria arguta, xlv, 175. ---- saxatilis, xlii, 18. ---- parvula, xiv, 117. Selloa nudata, v, 300. Shortia, characters of the genus, xlii, 48. Silene axillaris, vii, 62. ---- regia, xi, 182. Silphium, v, 301. Sium tricuspidatum, xi, 175. Smilax grandifolia, xlv, 171. Solorina saccata, xlv, 49. Sophora affinis, xlix, 130. Squamaria rubina, notice of, xxxix, 183. Stachys aspera, iv, 65. Stanleya amplexifolia, v, 297. Stillingia ligustrina, xlix, 129. ---- oblongifolia, xlix, 128. Streptopus maculatus, xlv, 170. Sullivantia, characters of the genus, xlii, 22. ---- ----, ohioensis, xlii, 22. Swertia deflexa, found in Maine, xxxii, 23. Thalictrum clavatum, xlii, 17. ---- debile, xlv, 175. ---- filipes, xlii, 17. Thermopsis caroliniana, xliv, 80. ---- fraxinifolia, xliv, 81. Thyrsanthus floridana, xxv, 75. Tiarella cordifolia, iv, 63. Tillandsia Bartrami, v, 292. ---- monostachya, v, 292. Tradescantia virginica, iv, 60. Trillium recurvatum, xi, 178. ---- viride, xi, 178. Tullia pycnanthemoides, xx, 343.^f Ulmus crassifolia, xlix, 129. ---- racemosa, xix, 170.^f Usnea acharius, from N. South Shetlands, vi, 104.^f Utricularia intermedia, xlv, 28. ---- nelumbiifolia, xlv, 215. ---- striata, xlv, 29. Uvularia lanceolata, xi, 178. ---- perfoliata, iv, 61. Vaccinium hirsutum, xlv, 175. ---- ursinum, xliv, 82. Valeriana ciliata, xlii, 51. Verbena bracteosa, xiv, 118. ---- lanceolata, xiv, 118. ---- hybrids of different species, xlvi, 99. Vicia Douglassii, iv, 66.