I40 BOTANICAL GAZETTE [FEBRUARY 
frequent, being met with generally only in more favorable 
environments (figs. 1, 2). 
The occurrence of clasping leaves on a lateral branch has 
considerable uniformity, at least for the individual plant. Ordi- 
narily a lateral branch has but one pair of clasping leaves, and its 
IGS. I, 2.—Fig. 1, showing general topography and mode of rience with 
single pair of clasping aves per branch; positions of leaves indicated by lines; fig. 2, 
plant with two pairs of clasping leaves per branch, secondary branching being 
absent altogether. 
daughter branches likewise have but a single pair; that is, the 
secondary, tertiary, etc., branches, each have but one pair of 
clasping leaves. Plants having two pairs of clasping leaves on 
every branch are also characterized by a similar uniformity, 
consisting of the total absence of further or secondary branching 
