1920] 
delphieus, 188; procumbens, 185, 
187; recurvicaulis, 168, 186, var. 
armatus, 168; recurvans, 185, 
186, 188; sativus, 189-191; semi- 
setosus, 185;  setosus, 185-189, 
191; tardatus, 168, 187; triflorus, 
134; trivialis, 185; vermontanus, 
185, 187-189. 
Rumex, Acetosella, 137; obtusifolius, 
137. 
Ruppia maritima, 15. 
Rynchospora, 180; Torreyana, 103. 
Sabatia decandra, 102; Kennedyana, 
102. 
Sagittaria arifolia, 137; isoetifolia, 
102; latifolia, forma diversifolia, 
136; teres, 102. 
St. John, H., The Genus Elodea in 
New England, 17; The Genus 
Galinsoga in North America, 97; 
A teratological Specimen of Aralia 
hispida, 152; Trillium rectistami- 
neum, a valid species in the south- 
eastern States, 78. 
Salix balsamifera, 134; cordata, 134; 
discolor, 131, 134; humilis, 134; 
humilis X discolor, 134; lucida, 
134, 135; pellita, 132, 135; peti- 
olaris, 135; rostrata, 131, 134; 
saximontana, 195; sericea, 134, 
135; sericea X petiolaris, 135; 
Uva-ursi, 38, 48. 
Sambucus racemosa, 134. 
Sand Reed, 70. 
Sarracenia purpurea, 41, 48. 
Saxifraga aizoides, 39, 49; Aizoon, 
39, 49; oppositifolia, 39, 49; saxi- 
montana, 195. 
Schizaea pusilla, 82. 
Schizaeaceae, 80, 82. 
Schoenus fuscus, 180, 181. 
Scientific Names applicable to our 
purple-flowered Eupatoriums, 157. 
Scirpus acicularis, 180; acutus, 55, 
56; atrocinctus, 135; californicus, 
55; cyperinus, 132, 136, var. pe- 
lius, 135; Halliü, 102; hetero- 
chaetus, 55; lacustris, 55, 56, var. 
oecidentalis, 56; occidentalis, 55. 
56, 92; pedicellatus, 135; subter- 
minalis, 136; validus, 55, 56. 
Sclerolepis uniflora, 103. 
Seutellaria galericulata, 135; lateri- 
flora, 134, 135. ; 
Second Report of the Committee 
on floral Areas, 80. 
Senecio Robbinsiu, 137. 
Index 
205 
Serapias, 181. 
Serpicula occidentalis, 21, 22, 27; 
verticillata, 8 angustifolia, 22, 28. 
Setaria glauca, 137; italica, 137; 
viridis, 137. 
Shad-bush, 131, 132. 
Sida, 74; hermaphrodita, 74; spinosa, 
74 
Sieversia Peckui, 48. 
Silver Fern, 113. 
Sisyrinchium angustifolium, 136. 
Sium cicutaefolium, 135. 
Smilacina stellata, 42, 49; trifolia, 
41, 48. 
Smilax herbacea, 134, 135. 
So-called generic Names of Ehrhart’s 
Phytophylacium, 180. 
Soil Tests of Ericaceae and other 
reaction-sensitive Families in 
northern Vermont and New Hamp- 
shire, 33. 
Solanum rostratum, 137. 
Solidago canadensis, 78, 136; lepida, 
var. fallax, 78, in Knox County, 
Maine, 77; macrophylla, 138. 
Solomon’s Seal, 130. 
Some noteworthy Matinicus Plants, 
110; Variations of Cardamine pra- 
tensis in America, 11. 
Sonchus arvensis, 193; pallidus, 10. 
Sorrel, Wood, 130, 143. 
Sparganium diversifolium, 
acaule, 135; fluctuans, 136. 
Species of Spergularia, A new, 15. 
Spergularia alata, 15; leiosperma, 
15, 16; marginata, 15, 16; A new 
Species of, 115; salina, 15, 16. 
Sphaeralcea, 74; Fendleri, 74; Mun- 
roana, 74. 
Spiraea latifolia, 132, 134, 135. 
Spiranthes Romanzoffiana, 137. 
Spruce, 130. 
Stachys germanica, 128; lanata, 128, 
Ontario, 128. 
Standley, P. C., Stachys lanata in 
in Ontario, 128. 
Star-flower, 130. 
Station for Gaylussacia brachycera, 
A new, 167. 
Stellaria, 38; alpina, 171; borealis, 
38, 48; media, 137. 
Streptopus amplexifolius, 48; roseus, 
38, 48, 137. 
Studies of some boreal American 
Cerastiums of the Section Ortho- 
don, 169. 
Stygiaria, 181. 
Supposed generic 
var. 
Character of 
