136 The Botanical Gazette. {April, 
The only en of this peculiar fact — to be that the germ- 
inating oats were infected with teleutospores of P. coronata, - ~ that 
both the ‘ecidiom ~~ a uredo-generation were eee sed. rding 
to Plowright,” who sited; in secre. young plants of ws with 
perce: of Puccinia graminis, oe cidium generation may be passed, 
and Prof. Lagerheim supposes the same to be the fact with P. coro- 
one Oui to. He has ain nd P. graminis near Quito, where it 
ecrren on some varieties of Avena, although none of the na of 
Berberis, nor even Mahonia Aquifo olium, which usually are bearers of 
its ecidium generation, exist in Ecua dor. He is therefore inclined 
explain sa —- ence of Puccinia graminis in the same way as that 
of P. coro —T. H. 
MM. Dax E AND BoRDAGE propose in the February number of 
the Revue pretae de Boténigue a method of analyzing and recording 
rs movements of plants photographically. Instead of the inter 
e method used b i 
rupted 
ite abe IR — eed in getting a continuous record. 
ence is the difference betw the occasional obacHean ons with A 
au Saunrcrer ana cag one obiin ed by the registering een 
box whose sl 
ot 
rowth oc- 
capable of 
t ~~ . certainly a very ingenious one, a ae 
The me 
scien meena ie details and necessary pers: we m 
eh ER THAT ie exhibition of weeds at the World’s Colum cn 
Exposition may be arge, and representative of all sections i 
Wee: Dr. Aghia D. Halsted, of the N. J. Experiment Station, 
Eck, N J Je aving this feature in charge) asks for specimen 
the worst weed m all states and territories. It is su ae : 
e 
dlin i f 
Toot system, the flower and fl clu ster, and the seed bare i 
f ay be hecessary, therefore, to secure these: various essentials - 0 
erent times during t ing season. If the weed is a Jam 
a ending, upon a herbarium sheet of ordinary size, 
ver a foot in length. Persons who will aid Dr. Halsted 
nted b m 
oe must all be done during the present season, 
S sent in for mounting, labels etc., by Decembe 
*The connection of whe: 
at mildew with th rey ecidiumly 
Woolhope Transactions, 1887. con pe 
