48 
one species of 7/ysanella and in all the species of Polygonella the 
branching is not nodal, but internodal. 
The internodal branching is brought about by the adnation of 
a secondary axis to a primary axis for a greater or less distance 
above a secondary node, usually about one-half the distance from 
node to node. The true condition is more plainly shown in 7/y- 
sanella, where the union of the two axes is not as complete as in 
Polygonella, a shallow but usually distinct groove showing the : 
place of union. : 
Explanation of the Figure, 
A. FPolygonella Americana (F. & M.) Small. 
B. Thysanella fimbriata (Ell.) A. Gray. 
a. Nodes. 
b. Point where the adnate axis diverges. 
A Plant Catapult. 2 
In the process of enlarging the College in collection a quart © 
or so of the pods of the Chinese Wistaria were recently brought — 
into the laboratory for their seeds. Some of'the ‘pods, that might 
