340 BIGNONIACEAE. 
CuiLopsis. Desert Willow. 
(Family Bignoniaceae). 
Shrub or small tree: decidu- 
ous. Twigs slender, ridged below 
the leaf-scars: pith rather small, 
rounded, continuous, white. Buds 
solitary, sessile, small, subglobose, 
with some 3 or 4 pointed scales 
swollen at base, the end-bud lack- 
ing. Leaf-scars 6-ranked, in whorls 
of 3 or in pairs, or scattered sin- 
gly, small, half-elliptical, raised: 
bundle-trace 1, transverse: stipule- 
scars lacking. The long terete 
pods, with seeds ciliate at the 
ends as in Catalpa, persist in 
winter. 
Chilopsis is the southwestern 
equivalent of the northeastern 
catalpas, and like them, though 
not in the same profusion, pro- 
duces large and showy flowers. It 
is scarcely hardy north of St. 
Louis in the interior, and like the catalpa is of rather irregu- 
lar open habit; but its slender willowy twigs and narrow 
leaves give it a grace entirely lacking to its coarser relative. 
Somewhat mealy: lenticels conspicuous. C. saligna. 
