409 
logical side of the subject was discussed in a paper read before 
Section E, but ‘some points of biologic interest it was thought 
best to present before the Botanical Club in an informal way. 
_ The- specimens in question represent a new fossil species of 
Liriodendyon, ‘which is unique inasmuch as the petioles of the 
_ leaves are bordered by wing-like appendages, a quarter of an inch 
or more in width. Similar appendages are known in other gen- 
era, and it is a matter of importance to know just what they 
represent, ie ie 
Platanus occidentalis shows basilar. expansions of its leaves 
extending down the petioles, besides conspicuous foliaceous stip~ 
ules at the base of the petioles. The significance of these has 
been shown by Prof. Lester F, Ward in his “ Paleeontologic His- 
tory of the Genus FPlatanus,’* in which. he advocates the theory 
that the stipular appendages represent portions of the lower part 
of the leaf-blades which have become separated and crowded 
down the petiole. 
With this new species of Liriodendron we are apparently now 
in a position to treat this genus in the same manner and to con- — 
Sider the conspicuous stipules which are on the young: branches,’ 
but soon ‘disappear, as possibly the ultimate development of the 
Wing-like appendages along the petioles of our Laramie’ fossil, 
Which in turn may be merely separated portions of the bases of 
the leaf blades, This interpretation involves the whole question — 
of the importance and significance of stipules in general and what 
they really represent in the living flora. The remarks were illus- 
trated by drawings of fossil species of Liriodendron and Platangs 
and mounted specimens of ZL, Zulipifera and P. occidentalis. 
Prof. C. R. Barnes communicated the fact that the sporophyte 
Stage of Bryoziphium (Eustichium) Norvegicum, found ten years 
°F More ago in Wisconsin by Mrs. E. G. Britton, and which had 
not been reported since, were collected in great quantities the 
Present summer by Mr. Cheney. It seems certain that this moss 
does not often fruit. ieee Bs ee 
Mr. J.J. Davis reported Entyloma Flerkee as forming its chains 
of gonidia in a broken instead of in a straight line. 
Se te ee Ce es 3 
'  *Proc..U, S. Nat. Mus. 11: 39-42. 
i 
