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Third — Brutblatter (brood-leaves), according to Correns arise on special 
shoots which may occur upon the same plant year after year. The leaves 
upon any one shoot diminish gradually in size from base to apex. At the 
base they run into the ordinary leaves. In shape they resemble ordinary 
leaves. They are composed of three layers of cells (a net work of chloro- 
phyll bearing cells lying in between an upper and a lower layer of hyaline 
water bearing cells) quite like a thin ordinary Leucobryum leaf, but are pro- 
vided with chlorophyll bearing cells superficially arranged upon the upper 
side at the tip and upon the under side at the base which function as rhizoid 
producers, producing the latter sometimes only at the apex, sometimes only 
at the base. Experimenting with the “ Brutblatter ” in nutrient solution 
Correns observed that protonemata were produced quite quickly sometimes 
from both apex and base, sometimes from base alone. Within a month very 
many young plants had formed. 
Correns states, that apparently this last mode of asexual reproduction 
has not as yet been observed but that it occurs quite frequently. Since hav- 
ing my attention called to the fact, I have noticed that in the case of many 
tufts of this moss very many small leaves are made to fly off by simply rub- 
bing the hand lightly over the top of the tuft; no doubt these are the Brut- 
blatter Correns refers to. 
Comparing the three modes, we note that in all cases, rhizoids are pro- 
duced ; in the case of the ordinary leaves, they arise from the upper side near 
the apex; in the case of perichaetial leaves, from the under side near the 
middle ; and in the case of the Brutblatter from the under side at the base. 
Both the specimens found are examples of the second mode of asexual 
reproduction, but although one was found a few months later than the other, 
I do not observe the slightest difference between them. As already stated, 
this mode is said to be quite common, but thus far, I have observed it but twice, 
in spite, too, of the fact that during the past year I made especial effort to 
find more cases. Others, also, to whom I have shown specimens, have never 
seen it, so possibly it may not be so very common after all. I would be 
pleased to hear from those who have observed it. 
Correns never found: any protonemata upon the rhizoids nor ever any 
plantlets, nor were either found upon any of my specimens. 
In Dr. Grout’s “ Mosses with Hand-lens and Microscope,” there is an illus- 
tration (Plate II) taken from Schimper’s “ Recherches,” showing this particu- 
lar mode of reproduction. Those interested in the asexual reproduction of 
mosses should read this chapter in Dr. Grout’s book, and also Dr. Best’s arti- 
cle on “ Vegetative Reproduction of Mosses ” in the Bryologist for January, 
1901. 
Any member of the Sullivant Moss Society, wishing to have a small speci- 
men of the Leucobryian glaucum showing this interesting “ radicular tomen- 
tum ” may get one by sending a self-addressed envelope to the writer. 
My thanks are due to Mrs. Annie Morrill Smith for her many courtesies. 
3933 Lowndes Ave., Baltimore, Maryland. 
