1892]. Noteworthy Anatomical and Physiological Researches. 121 
tween their volumes remaining constant between 17° C, and 
20°C. As regards the respiratory function, then, the mosses 
come into the general case of chlorophyll-containing plants. 
In the closed condition, the activity of the chlorophyll function 
(assimilation) diminishes nearly 50 per cent. The activity of 
oth respiration and chlorophylline assimilation abates as the 
moss becomes dry. The inference may be made that these 
functions slacken during the summer with the mosses. It is 
in spring and autumn, when they are continually moist, that 
they elaborate nutritive materials most actively. This ex- 
plains the appearance of the sporogonia during these seasons 
in so large a number of species.— RODNEY H. TRUE. 
Anatomy of the stolons of Graminez.* 
Although the function of the stolons in the Graminee is 
nearly the same, being at once reservoirs of nutritive matters 
and organs in the service of the vegetative propagation, the 
author has observed several differences in the interior struc- 
ture. And he claims at the same time, that the two general 
Lact, observed in stolons of different genera, which occur 
eed different conditions. He shows from the numerous 
sh €rgradations between the stolons under-ground and the 
Sots above-ground, that the organization of the stolon de- 
+5 nds upon a modification of the above-ground shoot. The 
mcture of the shoot above-ground is well marked by the 
ea of the mechanical tissue, which is either truly subepi- 
asa : = more or less distinctly subcortical, the bark being 
bilcs ar fot very strongly developed. But there is a large 
from Modifications between this form and those derived 
Such shoots as show a tendency to replace stolons. 
LP. LST 
desiondiak ci, : Naagra iakttagelser angaaende anatomien hos greesens un- 
Stockholm, 18))"° Bihang Kgl. Sv. Vetensk. Akad. Hadlgr. vol. xvi no. 3 
@l Sv. Vetensk. Ax 
: ad. Hdlgr. vol. xxi, no. 2, p. 30. 
Vol. XVII.— No. 4. 5 2 
