60 The Botanical Gazette. [Februory, 
The female receptacle or capitulum of both genera has a long 
peduncle, which springs from the end of the costa, being a a 
tion of the frond, of which the cavernous stratum is left be _ 
(which in Marchantia, for instance, is carried up to and may be i 
in transverse sections of the peduncle on its antical side) ; in Duva : 
this peduncle has but one furrow, in Cryptomitrium two; the a 
receptacles are very different and justify the separation of Cryptom! 
trium from Duvalia, being disciform in the former and almost 7 
cal in the latter; the rays of the receptacle in Duvalia are incurved Fe 
on the postical side united into a fleshy annulus, which surrounds t € 
end of the peduncle in form of a short vagina, while in Cypha 
they are stretched out and united into an uninterrupted plane ps 
fleshy disk; in both genera, however, the involucra spring from the 
postical side of the substance detween the rays, contrary to other a 
(Grimaldia, Clevea: and others) in which the rays themselves are de 
veloped into involucra. ith 
There are no perianths and the capsules of both genera open 
an operculum. Spores and elaters do not show any material differences. 
There could be traced numerous other affinities and distinctions 
with regard to other Marchantiacee; but this would exceed the eee 
of this article and would involve me in a great many morphol 
and anatomical details, which I leave to the study of those who real 
German and are, therefore, able to understand Leitgeb’s “ Untersuch- 
ungen tiber die Lebermoose,” the only scientific work on the i 
ment and anatomy of these plants which is very exhaustive, thoug 
our plant was not known to its author.— F. Stepuanl, Leipzig. 
Professor A. S. Hitchcock tells me that at St. ee ai 
Pyrus Loensis (see American Garden, xu. 469, Aug. 1891,) ek cer a 
distinct from P. coronaria. Among other differences, P. Ioensis ho a : 
its fruit longer than the other. He gives me the following note of a 
ruit: “Fruit about 25 mm. high and. 30 mm. in diameter. ae a 
3° mm. long, with two scars. Apple sunken at each end, where It 
pubescent; color Sreen or slightly yellowish. Lenticels rather pies ; 
nent and numerous. Fruit falling October 26th.” —L. H. BatLe% 
Cornell University, Ithaca, N. Y. 
Pyrus Ioensis.— 
pea ne paca oO RMSE 
EDITORIAL. ian 
L ConcrREss oF Boranists is an exceedingly ue 
itis really what the name implies. If, pate we 
m we would delight to honor, stay at home, an 
AN INTERNATIONA 
able thing, provided 
real botanists, who 
