138 The Botanical Gazette. [Aen 
for the interest he has taken and the assistance he has 9 
kindly given in the work. 
Biological Laboratory, Olivet College. 
of ovary of E. albi 
Noteworthy anatomical and physiological researches. : 
Anatomy of the tubers of Equisetum. 
Leclerc du Sablon, describingthe anatomy of these organsdl | 
Equisetum,' shows that they represent short branches redu 
toa single internode. These tubers aré situated upon 
rhizome; they are able, when detached, to develop inde 
pendent individuals. They are pear-shaped in Eqn 
Telmateja, occurring in clusters of two or three ata ee 
the rhizome. A transverse section shows a very thin -_ 
which has no incrustation of silica, and a starch-bearing pi 
enchyma just inside the epidermis. This parenchyma ent! : 
Surrounds the central part of the tuber including the rms" 
est part of the stem above ground in the Equisc ‘ 
: in thee 
a still larger number 1 ttered ale 
ar 
shape of a. V,which characterizes the bundles of = unite 
the tuber, 
where in the internodes of the rhizomes of Eguisetact® | : 
he most important character in the structure 
tubers, and by which they differ from the rhizome, 4° 
division ~ 
Sur les tubercul . : énérale de Botanig 
(1892.) no. 39. es des Equisétacées: Revue généra 
