512 
Rhus poisoning 508 
Riccardia 24 
Robbins, W. J. ti 
a Lt 
mell, L. G., ait of 336 
ey systems 412; Uahieation of excised 
ps 
tips 376 
Rose, J. N. 242 
Round, Eda M. 
Riibel, E., work 
Russell, re = - " Soil eeaditions and plant 
grow 
S 
abnis, T, S.; work of 246 
alacionads Ss 160 
alts and permeability to “— 420 
ata H. C., work of 1 
, W. M. 287 
of 2 
clerotinia cinerea, elect 5 plums 287 
cofield, C. S., work of 2 
Scrophu: riaceae and Os TO 335 
ears, 425, 500 
election, iuiecuentat 240 
venta 
23 
ear, c L. ‘work of 507 
ree 5s be Wi 30T 
hreve, 4 work of 416 
sent C, A. 153, 247, 333, 334, 339, 419, 
Siphocampylus 160 
Smith, T. O., work of 424 
ce baling 2473 eaisggee and plant 
wth 153; influe salts on 
Bactecisl gees es 163) one 420; 
sulphur as a factor in fertility 81 
uéges, 2, , work of 424 
Spessard, O4 : 
Sprague, T. A., ba - 160 
BY 2 
Stem tips, caltivation = excised 376. 
Sterility in Brassica 1 
Stomatal readetion < 499; variation 
248 
Stout, A. B. 11 
Stumps, overgrowth of 
Sturtevant’s notes on edible plants 413 
Sulphur, content in alfalfa 401; in soil 
81 
Swezy, Olive, work of 329 
Swingle, W. T. 2 
Sym itis in hiccet 200 
INDEX TO VOLUME LXXIII 
[JUNE 1922 
f% 
Taraxacum, leaf variation, rejuve- 
nescence, and senescence in 425; 
variations in cytolo and gross 
morphology 30 
Taubenhaus, J. J vee of 332 
lor, N., work o 
Temperature, e iret i 213 
The rmophiles, ie of 4 
Thone, 
Tisda le, W. _ abe of 155 
Tmesipteris 
eos irotinane in 469 
335 
Trinidad, Gemini in 
Triurocodon 2 
Tropalanthe 160 
Tryphostemma 160 
U 
Uredinales in Trinidad 58 
Uredo, Adenocalymmatis 67; a 
67; Mandevillae 67; Phyllanthi 67; 
sabiceicola A ; 
no ane columbianus 62; jamaicensis 
; Wulfha Sen a 
Urtica dioica, ecology o 
Vegetation and climate 416 
Wainio, E, A., work of 160 
Walker, J. C. 155 
n, F.B. gon of 247 
Waterhouse W. L., work of 5 
te ce Root development in the 
perien formation” 412; work of 
Webber, H. J., work of 157 
Weimer, J. L., work of 333 
Weiss, F. 496, 503 
Wheat seedlings, one on hydrogen 
ion concentration 3 
Wheldale, M., work 2 501 
Willaman, J. J. 287 
Willstitter, R., sa of 501 
Woodard, 
Woody plants, manual of 415 
Z, 
Zoblogisch-Botanische Gesellschaft 423 
