Appearance
Ranging from 1.5 to as much as 8 meters in height, it can take the form of a shrub or small tree. The linear, curved, deciduous leaves are 10 to 26 cm long and just a few millimeters wide.The generic name is derived from the Greek words ''χεῖλος'', , meaning "lip," and ''ὄψις'' , meaning "resembling," referring to the flowers. They occur in a terminal panicle or raceme, blooming in May through September. About two to four flowers at a time are open in each inflorescence. The calyx is about 8–14 mm, slightly inflated, and varying shades of purple, while the corolla is 2–5 cm, and with colors ranging from lavender to light pink. The throat and lower lip has a pattern of yellow ridges and purple lines, and the margins are crinkled. It is pollinated primarily by large bees in the family Apidae, such as carpenter bees, bumblebees, ''Anthophora'', and ''Centris''. The fruit is a linear pod up to 35 cm long, containing numerous winged seeds.
There are two subspecies:
⤷ ''Chilopsis linearis'' subsp. ''linearis''. Utah, Arizona, New Mexico, western Texas, Mexico.
⤷ ''Chilopsis linearis'' subsp. ''arcuata''. Nevada, California, Baja California.
Uses
It is cultivated for its large, showy flowers, and tolerance of hot, dry climates. Although the natural growth is a very irregular shape, it can be readily pruned into a conventional tree shape. A number of cultivars have been selected. Some, such as 'Rio Salado', have dark purple or magenta flowers.Chilopsis may survive temperatures as low as 10 degrees F .
''Chilopsis'' is closely related to the genus ''Catalpa'' and hybrids can be made between the two genera. The nothogeneric hybrid between ''Chilopsis linearis'' and ''Catalpa bignonioides'' has been named ×''Chitalpa tashkentensis''. It originated in a botanic garden at Tashkent in Uzbekistan.
Parts of the plant have been used in traditional medicine. It has been used to treat fungal infections such as candidiasis and athlete's foot, as well as wounds and cough.
The wood was used to make bows and baskets.
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