INDEX TO VOLUME 51 
New names and the final members of new combinations are in bold face type. 
Abutilon Palmeri, 290; sonorae, 290 
Acacia paucispina, 287 
Acalypha adenosta chya, 29 
Acanthocladium surculare, 245, 246; 
polymorphum, 245, 259 
Acer siatanoides, 194; rubrum, 189; 
Saccharum 
Aoopecati, 2473 aciphyllum, 253, 
2593 aspects 250; complana- 
m, 256, 259; cuculligerum, 
249,250; cuspidatiot um,257; 
ticula » 252, 259; diminutim, 
a i faleifolium, 253, 255; hamula- 
253; her stn ek So 256; 
ee iinm,. 248; leucophyl- 
um, 250, 259; longic 
monoicum, 256; 
259; Rae 254; pycn nophyllum, 
yi, 256, 259; rigens, 
lomoides, 2 
m, 249, 2 
tium, 253; stramineum, 248; 
culare, 258, 259 
Across the Sono Desert, 283 
Bie ae 370 
gae, 
Algae of ermal and ‘he pahions, 
» 351 : 
Allenrolfea, 129, 130; occidentalis, 
» 13 
Amaranthus pumilus, 191 
mmopursus, 392, 393; 
gerae, Eo ; pss 
Andes of Colombia, Fossil fruits from 
the East 
phat iy Vireintonh, 192 
Ohlin- 
Annona, 390 
hathures aripoense, 4; Guildingii, 
4; panduraeforme, 4 
ala, 
Appendiculata, 1 
Aralia hispida, 195; spinosa, 195 
Arthonia ciara 205, 206 
ARTHUR, JOSEPH CHARLES, New spe- 
cies of Uredinehéa-xV, 51 
Asarum reflexum, 18 
Asclepias quadrifolia, 196 
Ascospora Scolopendrii, 52 
Asimina, 390 
Aster concolor, fh ts 387, 
88; vegies Ss, 
A ais 20, 22: 
linus, 14, ABS collinus subgla r, 173 
curvicarpus, 17; cyrtoides, 14-1 ; 
pt 16; flexuosus, 20; Gibb- 
14, 15; ibbsii curvicarpus, 16; 
Gibbeli falciformis, 16; Hallii 
tegetarius rotundus, 
Tweedyi, 14; viridis, 20; viridee 
impensus, 21; Whitedii, 17 
Aubrya, 
Avena, 37 
Avicennia, 357; nitida, 357 
Bacterium tumefaciens, 449-451, 453, 
55> 4 
Bahamas, Notes on algae of Bermuda 
and the, 351 
eget os. arundinacea, 341, 348, 349; 
polymorpha, 342 
Berbila fnevipila pagorum, 337 
BARTRAM, Epwarp B., Studies in 
ie as represented in Southern 
Arizona, 33 
assia hareeen Y 
Batrachium trichophyllum, 192 
auhinia anguina, 342, ou 
Berberis ae, 27.4 
Bermuda an Be Bi omiad Notes on 
RD W., Fossil nai 
from the Panera Andes of Col 
