44 BOTANICAL GAZETTE | JANUARY 
organs. It appears that this strand is the axial bundle of the 
entire shoot, and that the apical region represents the undiffer- 
entiated condition from which the basal internode and node 
have become specialized. 
With such an interpretation as this, the discussions whether 
this is flattened stem or leaf have no morphological basis, and it 
would be more appropriate to speak of the undifferentiated 
shoot as a thalloid structure than as a stem or leaf or frond. 
ORGANOGENY OF THE FLOWER. 
Plants in the flowering condition usually have well developed 
pouches at each side of the node. In one of these a young 
plant appears, while a flower develops in the other. This flower 
is often accompanied by a young plant, which when present 
appears just outside of the bottom of the spathe. Quite fre- 
quently it grows rapidly, and takes the place of the flower, 
though in many cases the parts of the flower are seen to have 
broken down before they were encroached upon, thereby mak- 
ing it clear that some other influence than pressure from the 
young bud injured the flower. Flowers may reach maturity, 
however, when young buds are growing at the side of the spathe. 
In fig. § is shown the diagram of a section made transverse 
to the surface of the plant, passing through the node in such 
Fic. 8. Diagram of cross section of plant showing an old flower in one pouch 
and a young frond bearing a young flower in the other. 35. 
direction that in one pouch the carpel (a) and stalk of one sta- 
men (6) of an old flower are shown; while in the opposite 
pouch is a young plant (¢c) which bears a young flower (d). At 
i Te ee 
