INDIVIDUAL FLOWERS OF THE CATALPA SPECIES 
The flowers of the hybrid are somewhat narrower than those of the larger flowered parent but 
are similarly white in the ground color, while the other parent is yellow. Likewise in the orange 
color of the large stripes the hybrid resembles C. bignonioides, as the small flowered parent 
has dark yellow stripes. (Fig. 9.) 
In addition to being resistant to low 
temperatures the combined plant is less 
affected by the leaf spot, Macro- 
' sporitum catalpae, E. & M., which attacks 
all catalpas, but, as observed, the 
spotting of the leaves has been much 
more severe on C. bignonioides than on 
the other parent and the cross. Per- 
haps there is some relation here to the 
pubescence of the leaves. 
PRACTICAL USES OF THIS TREE 
The value of the hybrid, in its more 
rapid growth, greater hardiness and 
profuse blooming, recommends itself to 
the landscape gardener. The flowers are 
not difficult to manipulate and each 
pod contains a large number of seeds, so 
that it is quite feasible to produce the 
first generation crossed trees for use as 
ornamental plantings. As a timber tree, 
it is rather doubtful whether the hybrid 
has a sufficiently greater growth than 
C. speciosa, the tree usually grown, to 
warrant its production for that purpose. 
However, a catalpa grove is a fairly per- 
manent investment, the trees growing up 
from the stumps after each cutting, 
thereby extending the usefulness of 
one planting over a long period of time, 
so that considerable expense in obtaining 
the seed might well be justified. There- 
fore, it would be well worth while to 
try this hybrid in those localities where 
catalpas are more extensively grown for 
posts and ties. 
The seeds produced by the hybrid 
trees are well developed and are fertile. 
A sample tested in the incubator gave 51 
% viability. None of the second genera- 
tion plants have been grown from this 
25) 
