144 THE JOURNAL OF BOTANY 
upon the petiolules of the two leaflets in different phases of 
ovement, 
Mr. E. Saumon, at the same meeting, read a paper on 
Specialization or Parasitism in the Hry pic He began by ex- 
eg the *‘ biologic form,” by instancing two fang which 
ere not distinguishable morphologically, a which acted in 
diverts fashion on the same host-plan s phenomenon had 
been known in the Uredinee for some im b t its discovery in the 
rye graminis *f. Bromi.’ Over ee hundred pots of seed- 
the results obtained from the series of comparative infections 
pointed t ) _ af adie of four, or more probably five, ‘ biologic 
forms’’ existing on Bromus interruptus, B. hordeaceus, B. commutatus, 
and B. tectorum and 8. arvensis. It was pointed out _ there = 
reason to rene that the species B. tectorum may serve, from 
point of view of the fungus, as a bridge between se ceili of ie 
sections Serrafaleus and Stenobromus. The author also pursued his 
g 
oat-form cannot ate wheat, barley, or rye, but it can attack _ 
species of rye. Finally, experiments were made with H, Pol, 
on Trifolium pratense, which proved unable to i nfect seven ae 
species of Trifolium (besides species of Lotus, pasta enn 
Lupinus, and Pisum), but it always succeeded on its own host-plant 
The form of EL. Polygoni on Pisum sativum Srfastod: P. arvense, but 
seri not touch species of Trifolium, Onobrychis, Colutea, and 
Bryotoeists will note with pleasure that the recently issued 
Part xxii. of Dr. B <add s British Moss-Flora (published by 
the author at 26, Endymion Road, Brixton Hill, March, 1903, 
pp. 169-200, plates “ag deron wits ce 6s s.) brings t the work so near to 
its end that only one more part remains to be printed; for the 
Sphagnacee will be put into other hands for treatment. In the 
present part twenty-three species are described and twenty-six 
ogee Th e three remai ning species of Stereodon are given and 
Plagiothecium (six), Acrocladium (one), Entodon (one). Then come 
ree Pterygophyllaceous genera — Pter ygophy!Lum, Cyclodictyon, 
Daltonia, each with one species; and, finally, two Neckeraceous 
Sei otrichum and Homalia, with two and vile species respec- 
y 
‘Tue Catholic University of Lyons, which is in possession - the 
herbarium of Alexis Jordan, is about to distribute the num 
a Meh ik contains. Further information may be cbiained 
