1904] 
Nelson, Aven 260 
Nemac cladus, Eastwood on 75 
7 
rig 7 cont ‘thein 
etoptery rygium, Boissieu on 
eens, cobanensis 418; macrophylla 
Neuropteris See a Oliver on 238 
New cal G — 80, 484; 
Ae Cellens pes F orestry I 
Newcombe, F. C. 
Newell, Arber and, = fossil J er 319 
Nitrogen for algae, Reinke 
yal fusion of Unedinesil — 
320 
N uphar zone, of morainal ag 40 
Nutrition of the e ia 346 
m7; 
=e aime preparation of 
wokas,’’ Coville on 396 
aga Greene 
Olive, E. W., potest ais, 
Oliver, F. W,, on fossil plats 476, 478; 
on Neuropieris = terop 238; on 
origin of the ae phn Scott, on 
yginode Sait on 2 a 
Oliverella, Britton aad age on 234 
ncopodium, new w genus 
Ophioglossum simplex, hove on 478 
Opperman, Marie 2 
Opuntia, three new § species, Weber on 234 
Orchids, germin ation, Bernard on 228; of 
southern Florida, Ames on 403 
Be ane meiocephalum 210; oligocar- 
Choticuche, ludoviciana 279; xanthochroa 
Orth ——" she on 2 ° 
Osborn, H., pers nal 404 ede 
Dames, 5 Sehabaiunk o 400 
Osmotic pressure, Bernard on 70 
an a aa of roots 35 
Ovule, natu » Worsdal on 317; origin, 
Oliver 
Oxidases, Aso 0 157; Griiss on 477 
Oxycoccus m ria carpus 42 
Sete parr effect on, Pantanelli on 
zr 
pallavicinia, nuclear tbe 4 
nicum, amarum minus 429; pubescens, 
rontiny seed 1 
INDEX TO VOLUME XXXVII 
493 
phconmcti E., on effect on evolution of 
oxyge 
Parasitism, of fungi, origin, Massee on 480 
piss ris ero sri. embryology and cytol- 
, Ernst on 72; sperm nuclei 359 
Painiaoeae new genus of, Hennings on 
Peas, spermatogenesis of hybrid, Cannon 
on 
Pectocarya, miser 278; penicillata 278 
J 
Penhallow, Dz P., “Tertiary plants” 155 
Pentstemon, Heller on 234 
Peridermi 
um on Pinus 448 
Perithecia = bated * Mollia rd on 69 
net, pao 79; “‘Fragmenta 
* 393 
ary P. 484; Ar- 
noldi, W. 239; sap ee E. a3 Bay, 
‘60; Behr, H. H. 484; Behrens, W. 
24; ? 
aon 239; Whitford, H. 
B. 239; Wieland, G. R. 79; Wiesner, 
J. 324; Wolfe, J. J. 324; Woro: 
484; Yapp, - 
Peucedanum, Boissi 
75 
Pfeffer, W., ‘Pflanzenphiysologie” 391; 
“Physiology of plants” 39 
