1924] Index 
INDEX TO VOLUME 26. 
New scientific names are printed in full-face type. 
Acanthospermum, 34; australe, 34. 
ET platanoides, 226; saccharum, 
128 
Aceraceae, 226. 
Achillea, 34, 185, 187, 232; lanulosa, 
34; Millefolium, 34, 184, 185, 186, 
228; ptarmica, 34; tomentosa, 34. 
Achlya, 218. 
Achnanthes longipes, 193, 215. 
Acrochaetium virgatulum, 214. 
Actinococcus subcutaneus, 214. 
Actinocyclus crassus, 193, 215; 
Ehrenbergii, 193, 215. 
Actinoptychus undulatus, 193, 194, 
215. 
Adiantum pedatum, 177. 
Ageratum, 34; Houstonianum, 34; 
mexicanum, 34. 
Agoseris, 126, 127; gaspensis, 125; 
gracilens, 125. 
Agrimonia Eupatoria, 39; grypo- 
sepala, 39. 
Agropyron, 230; repens, 185, 222. 
Agrostis alba, 2, 185; var. aristata, 
2; capillaris, 2, 185, 222; pal- 
ustris, 139; tenuis, 2; f. aristata, 
2; vulgaris, 2, 222; vulgaris 
aristata, 2. 
Ahnfeldtia, 189, 232; plicata, 214. 
Aizoaceae, 224. 
Alchemilla vulgaris, 222. 
Algae of British Columbia, Further 
Notes on, 160. 
Alsine, 171; pubera tennesseensis, 
169, 171; pubera, var. tennes- 
seensis, 170; tennesseensis, 170, 
71 
H 
Amaranthaceae, 224. 
Amaranthus retroflexus, 186, 224. 
Ambrosia, 35, 187; aptera, 35; 
artemisiifolia, 35, 184, 185, 228; 
trifida, 35; var. integrifolia, 35. 
Amelanchier, 178; Bartramiana, 
178, 179; Flowering Dates for, 
178; laevis, 178, 179; oblongi- 
folia, 225; sanguinea, 179. 
America, The Dwarf Antennarias of 
Northeastern, 05; New or re- 
cently restudied Plants of East- 
ern, 122. 
American Lespedezas, Notes on, 25. 
Ammodenia peploides, 184, 224. 
Ammophila, 185; breviligulata, 184, 
222 
Amphithrix, 161, 162; janthina, 162. 
Amphora Grevilleana, 193, 216; 
obtusa, 193, 216. 
Anabaena affinis holsatica, 162; 
flos-aquae, 162; inaequalis, 162; 
oscillarioides, 162; var. steno- 
spora, 211; torulosa, 190, 191, 212. 
Anacardiaceae, 226. 
Anagallis arvensis, 185, 186, 227. 
Anaphalis, 35; margaritacea, 35. 
Andean plants in the northern 
Hemisphere, 89. 
Andrews, Luman [notice of work], 
9. 
Aneura palmata, 7. 
Ankistrodesmus falcatus, 164, 211. 
Antennaria, 35; albicans, 97, 100, 
101, 102; alpina, 95, 96, 97, 
98, 99, 102; var. cana, 98, 99; var. 
canescens, 98; var. typica, 98; 
var. ungavensis, 98; angustata, 
98; appendiculata, 97; arida 
viscidula, 101; Brainerdii, 97; 
cana, 96, 98, 99, 102; canadensis, 
35, 97; carpathica, 100; eucosma, 
96, 100; fallax, 35, 97; glabri- 
folia, 97; isolepis, 97, 102; lanata, 
100; neglecta, 35, 97; neodioica, 
35, 97; var. grandis, 35; nitida, 
96, 97, 101, 102; occidentalis, 35, 
97; Parlinii, 35, 97; Peasei, 97, 
101, 102; petaloidea, 35, 97; 
plantaginifolia, 35, 97; var. petio- 
lata, 35; pulcherrima, 96, 100; 
pulvinata, 102; pygmaea, 96, 99, 
100, 102; solitaria, 97; Sorn- 
borgeri, 96, 98, 102; spathulata, 
97; straminea, 96, 100, 102; 
subviscosa, 97, 101, 102; umbrin- 
ella, 102; vexillifera, 96, 99, 102; 
viscidula, 101. 
Antennarias of Northeastern 
America, The Dwarf, 95. 
Anthemis, 36; arvensis, 36; var. 
agrestis, 36; Cotula, 36, 228; 
tinctoria, 36. 
Anthoceros laevis, 13. 
Anthocerotaceae, 13. 
Anthoxanthum odoratum, 185, 222. 
Anthrodesmus octocornis, 209. 
