1921] 
eae 2 a” “gaia of 468 
n .. work of 469 
Juniperus, after-ripening and germination 
- of seeds 32 
Jurica, H. S. 138 
ies 
Karrer, Joanne 78 
Kern, F. D., work of 470 
Koketsu, RR, Mager of 407 
Korstian, C.F 
L 
Larix, morphology of 408 
Leaf spots of elm 161 
Leaves, s, mottling of 81 
Leptospermopsis 471 
pont effect on germination 249 
e, J. 2 
245 
ot - Fea work of 80, 407 
Lycopodium 
M 
MacDuffie, R. C. 4 
Macoun, John, Wes vaphinat sketch of 
236 
Macchia. Gertrude E. 392 
McCool, M. M., work of 160 
a 
Magnus, P., work of 246 
rin, J. WN. 
ork of 471 
Morning glory, “development i in 392 
Mottling of lea 
Mucor and Chaienladions 75 
Munger, T. T., work of 242 
Mycosphaere lla 189 
Myrmecophilous plants 472 
INDEX TO VOLUME LXXI 
475 
N 
Naiadothrix 2 
~~ A. 6, hisinchion! sketch of 
Neller, J. R., work = 76 
Newcombe, F. C. 1 
Nichols, G. E, ok of 2 
Nitrites ye! nitrates in eS 248 
North ae flora 240, 408 
O 
Oak, 2 ig gpgrahes a on 220 
Orton, C. R., work of 4 
Osmunda, scons my in 
Ostrup, E., a Gacke-watek diatoms from 
Iceland” 2 
r 
Pack, D. A. 32 
Paleobotany, textbooks of 238 
Panic 
Papua, fe f 79 
Parker, F. W., work of 77 
r 
Sahar J. work of 403 
Peat so 
Seasecs My “C. C., work of 160 
ennell, F. W., work of 241 
Pfeffer, Wilhelm, biographical sketch of 
152 
Phoma cincta 191 
Photosynthesis, rate of 247 
gy cena confertissima 191; ulmi- 
Pice mg finns a, diamet cae Naa 
Plant haces See vd 
Plum, dormancy and hardin 
Potonié, Dr H, “Lehwback der gg om 
anik” 
i F. a work of 78 
Pra tany 402 
Picadabetilastecnt 471 
R 
Radio-active material 246 
Ramaley, F., work of 246 
Ramsdenia 240 
Raunkiaer, C., work of 
Reboulia, embry ryogeny at errors 
in 446; gametophyte and sex o 
of 61 
Reserve food in biggie tissues 146 
gen ions” 155; s “The lichen 
flora and lichen vegetation of Iceland” 
