1919] 
‘Southbya biformis, 150; hyalina, 
150; obovata, 162. 
Specific Characters of Eragrostis 
peregrina and its two Allies, 133; 
Identity of Arenaria groenlandica 
and A. glabra, 17. 
Spergula stricta, 11. 
Spergularia, 8; segetalis, 9 
Spermatochnus australis, 207. 
Sphenopholis, 216. 
Sphenosciadium, 182. 
Spiderwort, Virginia, 49. 
Spruce, 31, 108, 109; Bastard, 46; 
Black, 50, 51; Hemlock, 109; 
Norway, 106; White, 41, 50, 108, 
109. 
Standley, P. C., A neglected Solidago 
Name, 69; 'A new Locality for 
Senecio Crawfordii, 117. 
Staphylea, 127; trifolia, 127. 
Staphyleaceae, 127. 
Steironema ciliatum, 201. 
Stellaria, 8; Arenaria, 5; biflora, 11, 
13; borealis, var. isophylla, 199; 
groenlandica, 20; laricifolia, 16; 
media, 8, 170. 
Struthiopteris, 175. 
Swamp Magnolia, 119. 
Sweet Gum, 49. 
Swertia, 193; carinthiaca, 193, 197; 
pusilla, 195; rotata, 193-195, 197; 
sulcata, 194. 
Symphyocladia gracilis, 203, 204, 206. 
Taenidia integerrima, 88. T 
Tamarack, 46. 
Tanacetum vulgare, 170. 
Taraxacum officinale, 170. 
Taxus canadensis, 199. 
Tea-plant, 70. 
Terebinth, 67. 
Tetrodontium Brownianum, 207. 
Thalictrum dioicum, 200. 
Thelypteris, 174-177; Boottii, 177; 
cristata, 177, var. Clintoniana, 
Lit; Dryopteris, 179; Filix-mas, 
177; fragrans, 176, 177, Goldiana, 
Lit; hexagonoptera, 179; mar- 
ginalis, 178; noveboracensis, 176, 
178; palustris, 178; Phegopteris, 
179; Robertiana, 179; simulata, 
178; spinulosa, 178, var. ameri- 
cana, 178, var. concordiana, 178, 
var. intermedia, 178. 
"Thuja, 54, 55, 57-64; occidentalis, 
43-45, 51, 54, 55, 58-60, 62-64, 
189, Lithological Factors limiting 
the Ranges of Pinus Banksiana 
and, 41. 
Index 
233 
Tiarella, 201; cordifolia, 130, 200. 
Tilia, 190; americana, 199. 
Tillaea aquatica, 10. 
Tilleastrum, 10. 
Tissa, 8. 
Tofieldia racemosa, 119. 
Toxylon pomiferum, 190. 
Tradescantia, 49, 50; virginiana, 49. 
Trees of Indiana, Deam’s, 188. 
Triadenum virginicum, 119. 
Trichophyllum, 10. 
Trientalis americana, 200. 
Trifolium pratense, 170; repens, 170. 
Triglochin maritima, 65; palustris, 
65, 87. 
Trillium erectum, 200. 
Trisetum, 76, 130; purpurascens, 76, 
77; spicatum, 128-131, in Penn- 
sylvania, Discovery of, 128, var. 
molle, 131, 132. 
Trollius laxus, 87. 
Tryphane, 11, 12; verna, 11. 
Tsuga, 41; americana (Mill) Far- 
well, a final Word, 108; canadensis, 
. 41, 108, 199. 
Tussilago, 201. 
Twining, A. [Notice of Work], 172. 
Two color Forms of Lobelia cardi- 
nalis L., 217; Festuca Varieties, 
72; new Myriophyllums and a 
species new to the United States, 
120. 
Type of the Genus Alsine, 7. 
Typha angustifolia, 148; latifolia, 148. 
Ulmaceae, 190. 
Ulmus, 42; americana, 42; 
199; montana, 42. 
Ulva Lactuca, 205 
Umbelliferae, 170; Planerotaenia, a 
new Genus of, 181. 
United States, 'Two new Myriophyl- 
lums and a Species new to the, 120. 
Unity of the Genus Arenaria, 1. 
Unusual Daucus Carota, 70. 
Urticaceae, 170, 190. 
Utricularia, 68; gibba, 73; purpurea, 
75; subulata, 119; vulgaris, var. 
americana, 75. 
Uvularia perfoliata, 199. 
fulva, 
Vaccinium atrococcum, 119; caes- 
pitosum, 192; canadense, 199; 
corymbosum, 119; Myrtillus, 66; 
pennsylvanicum, var. angusti- 
folium, 192; stamineum, 199; uli- 
ginosum, 192; vacillans, 199; Vitis- 
Idaea, var. minus, 192. 
Valeriana uliginosa, 65, 88. 
