1918] 
biums of the Section Lysimachion, 
29; Connecticut Plants, 97; new 
Species and Varieties of Poa from 
eastern North America, 122; North 
American Representatives of Braya 
humilis, 201; Rhode Island Grasses, 
116; Species and Varieties of 
Elymus in eastern North America, 
81. 
Sonchus arvensis, 98, var. glabres- 
cens, 107. 
Sopubia, 136. 
Sorbaria, 59; sorbifolia, 59. 
Sorrel, Wood, 76, 78. 
South Weymouth, Massachusetts, 
Plants from, 115. 
Species and Varieties of Elymus in 
eastern North America, Some, 81; 
and Varieties of Poa from eastern 
North America, Some new, 122; 
of Bladdernut, A new, 127; of 
Viburnum, On the Names of some, 
11. 
Specific Identity of Bidens hyper- 
borea and B. colpophila, 146; 
Validity of Limosella subulata, 
160. 
Spergularia canadensis, 97; 
sperma, 97, 116; salina, 116. 
Sphaeralcea Fendleri, 20. 
Sphagnum, 43, 142, 143. 
Spiraea, 59; latifolia, 59; prunifolia, 
59; tomentosa, 59, forma albi- 
flora, 59. 
Spiranthes, 111, 114; gracilis, 112- 
114; in Dover, Massachusetts, 111; 
X intermedia, 113, 114; neglecta, 
leio- 
112, 114; praecox, 112, 113; 
Romanzoffiana, 101; vernalis, 111- 
114. 
Spruce, European, 187; Hemlock, 
187; White, 186; White New- 
foundland, 187. 
Staphylea, 127, 128; Brighamii, 
129; trifolia, 129. 
Statice Limonium, var. caroliniana, 
106. 
Stenandrium, 68; droseroides, 68; 
punctatum, 68; rupestre, 68; sca- 
brosum, 68. 
Stenophragma, 202, 
Strophostyles, 171; helvola, 171. 
Suaeda, 104; americana, 104; lin- 
earis, 116; maritima, 104 
Suksdorf, W., Cardamine oligo- 
sperma and its near Allies, 197. 
Tape Grass, 108. 
Index 219 
Tephrosia, 208; virginiana, 208. 
Teucrium canadense, 107, var. lit- 
torale, 102, 106. 
Textbook for High Schools, A new 
botanical, 100. 
Thalictrum confine, 184, 194; dasy- 
carpum, 184, 196, 197; dioicum, 
184, 193; polygamum, 184, 185; 
revolutum, 184, 193. 
Thapsia trifoliata, 52. 
Thaspium, 52; aureum, 52, 73, var. 
atropurpureum, 52, 73; trifolia- 
tum, 52, 73, var. flavum, 53, 73. 
Tidestrom, I., Tsuga canadensis (L.) 
Carr., 185. 
Tillaea aquatica, 105. 
Trifolium, 208; agrarium, 208; ar- 
vense, 208; dalmaticum, 208; 
dubium, 208; echinatum, 208; 
hybridum, 208; incarnatum, 208; 
Macraei, 208; medium, 208; pra- 
tense, 208; procumbens, 208; 
purpureum, 208; repens, 208; re- 
supinatum, 208; tomentosum, 209. 
Trigonella, 209; laciniata, 209; 
Nocana, 209; ramosa, 209. 
Triosteum, 116; aurantiacum, 116, 
var. glaucescens, 116, A new 
Variety of, 116. 
Trollius laxus, 184, 196. 
Tsuga americana, 185, 187; 
densis, 185, 186, 188. 
Tubiflorae, 151. 
Tupelo, 205. 
cana- 
Usnea plicata, 40. 
Vaccinium canadense, 101; pensil- 
vanicum, 101, var. nigrum, 101. 
Valeriana uliginosa, 101. 
Validity of Oxalis americana, 76. 
Vallisneria americana, 108-110, Diag- 
nostic Character of, 108; spiralis, 
108-110, 8. americana, 108, var. 
americana, 110. 
Varieties of Elymus in eastern North 
America, Some Species and, 81; 
of Poa from eastern North Ameri- 
ca, Some new Species and, 122. 
Variety of Smilax glauca, 78; of 
Triosteum aurantiacum, ʻA new, 
116. 
Viburnum, 11, 14; affine, 13-15, var. 
affine, 14, var: hypomalacum, 
14; americanum, 14; Demetrionis, 
13; dentatum, 11, 12, var. longi- 
folium, 15, a. lucidum, 11, 12, var. 
pubescens, 11, 8, pubescens, 11, 12, 
