~ 
76 BOTANICAL GAZETTE (yay 
the development of hypertrophied tissues, which become filled with s r 
The author’s experiments, while not yet conclusive, strongly Support 
theoretical conclusions, since a decided parallelism is seen to exist. twe 
the amount of tuber formation and the development of the fungus. 
ever, no cultures entirely free from fungus have yet been made. 
notes than when the potato was introduced into France, tuber could : 
then infest the soil..—H. C. Cow 
TANSLEY and CHIcK™ have made some interesting anatomical s 
the conducting tissue system of bryophytes. The main purpose 
Some so-called vascular plants. The tracheids of the liverwort P 
were studied and were shown to conduct eosin solutions more rapidly Ge 
neighboring tissues, though much more slowly than Haberlandt found 
true in moss bundles. The rhizome of Polytrichum was found 
structures _ the roots of seed plants, viz., a oe 
of conducting bundles. Mnium and Bryum show incomplete — 
_ while Polytrichum and its allies show bundles of hydroids and 
meating the entire plant, as in ferns and seed plants. In Polytri 
Sa hydrome mantle outside the central cylinder of leptome and | 
_ this respect resembling ferns. The authors think that this out Z 
be the downward. Projection of the leaf bundle, the “ = 
being at the center.— H. C, COWLEs. 
___THE sTRUcTURAL DIFFERENCES between the white and § 
peor ayes has been recently noted. The general subj 
rung” (perhaps _ term may be rendered into Engl 
ar as noted in the review of 
paper; in some cases (as jens the albescent portions * are thi 
Annals of Botany 15: 1-38. ‘Tgor. - Bor. Gaz. at: : 209. ie 
oe dissertation, Gottingen. 1900. See Bot. Centralb. 5° 
