1924, Index 247 
Silybum, 150; marianum, 150. 
Sisymbrium altissimum, 225; offici- 
nale, 225; Thalianum, 199, 232. 
Sisyrinchium angustifolium, 223; 
bermudianum, 223. 
Sium suave, f. fasciculatum, 48. 
Smilax rotundifolia, 223. 
Smith, C. P., Pseudotaenidia in 
Maryland, 23. 
Solanaceae, 227. 
Solanum nigrum, 186, 227. 
Solidago, 150, 187; altissima, 150; 
arguta, 150; asperula, 150, 176; 
bicolor, 150; caesia, 150; var. 
axillaris, 150; var. paniculata, 
150; canadensis, 150, 228; var. 
Hargeri, 150; Elliottii, 150, 176; 
graminifolia, 150; var. Nuttallii, 
150; humilis, 150; juncea, 151, 
228; latifolia, 151; nemoralis, 151, 
229; odora, 151; puberula, 151; 
rigida, 151; rugosa, 151, 186, 229; 
var. aspera, 151; var. sphagno- 
phila, 151, 176; var. villosa, 151; 
sempervirens, 151, 185, 186, 229; 
serotina, 151; var. gigantea, 
151; speciosa, 151, 176; squar- 
rosa, 151; suaveolens, 151, 176; 
x rugosa, 152; tenuifolia, 37, 38, 
151; uliginosa, 150; ulmifolia, 
151; uniligulata, 151; var.. neg- 
lecta, 151. 
Some Changes in Nomenclature, 1. 
Sonchus, 166; arvensis, 166, 1806, 
229; var. glabrescens, 166; asper, 
166, 229; oleraceus, 166, 184, 
229; f. lacerus, 166. 
Spartina, 187, 190; alterniflora, 187, 
223; juncea, 223; patens, 186, 
223; stricta, var. alterniflora, 223. 
Spearmint, The Correct Name for, 
19, 171. 
Specularia, 19, 230; perfoliata, 19. 
Speculum Veneris, 230, 231. 
Spergularia marina, 185, 225; rubra, 
225; salina, 225. 
Spermothamnion Turneri, 215. 
Sphacelaria, 190; cirrhosa, 214. 
Sphaerella lacustris, 212. 
Sphaerozosma, 204, 210; excava- 
tum, var. subquadratum, 210. 
Sphagnum Russowii, 9. 
Sphenolobus exsectaeformis, 9; ex- 
sectus, 9;  Hellerianus, 10; 
Michauxii, 10; minutus, 10. 
Spirogyra, 212. 
Spirotaenia, 204; condensata, 204. 
Spirulina tenuissima, 215. 
Spondylosium, 210; papillosum, 
. 210; pygmaeum, 210. 
Spongomorpha lanosa, var. uncialis, 
213. 
Sporobolus asper, 175. 
Springfield, Mass., Flora of, 179. 
Spyridia filamentosa, 215. 
Stachydeae, 62. 
Stachyoideae, 62. 
Staurastrum, 204, 209, 212; aciculi- 
ferum, 209; alternans, 209; Arctis- 
con, 209; avicula, 209; brevispi- 
num, f. majus, 209; Cerastes, 209; 
coronulatum, 209; crenulatum, 
209; cuspidatum, 209; cyrto- 
cerum, 209; dejectum, 209; Dick- 
iei, var. circulare, 209; dilatatum, 
209; eustephanum, 209; furcig- 
erum, 209; gladiosum, 209; 
gracile, 209; var. bilbosum, 209; 
var. cyathiforme, 209; grande, 
209; laconiense, 209; lepto- 
cladum, 209; maamense, 209; 
muticum, 209; pilosum, 209; 
Ophiura, 209; orbiculare, 209; 
pseudotetracerum, 209; punctu- 
latum, 209; Sebaldi, 209; spongio- 
sum, 210; tetracerum, 210; tumi- 
dum, 210. 
Stellaria, 169, 171; graminea, 185, 
225; media, 225; pubera, 169, 170, 
171; Note on, 169; subsp. homo- 
tricha, 171; subsp. silvatica, 170, 
171; var. silvatica, 171. 
Stichococcus bacillaris, 212; flac- 
cidus, 212. 
Stigonema informe, 164; ocellatum, 
164. 
Stokey, A. G., Flora of Penikese 
Fifty Years after (Pteridophyta) 
219. 
Stout, William, 50, 52, 53, 54, 55. 
Striatella unipunctata, 193, 218. 
Strophostyles angulosa, 176. 
Study of the Genus Zizania, A, 
153. 
Subularia aquatica, 38. 
Succisa, 17; pratensis, 17. 
Sumac, 182. 
Surirella Molleriana, 194, 218; 
recedens, 194, 218. 
Svenson, H. K., Notes on some 
Plants of eastern New York, 221. 
Symphoricarpos, 16; albus, var. 
laevigatus, 16; orbiculatus, 16; 
racemosus, var. laevigatus, 16. 
Synechococcus aeruginosus, 162, 
164. 
