Stereospermum tetragonum

Yellow snake tree
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Bignoniaceae
Genus:	Stereospermum
Species:	S. tetragonum
Binomial name
Stereospermum tetragonum DC.
Synonyms
Bignonia caudata DC. Bignonia caudata Miq. ex C.B.Clarke nom. illeg. Bignonia colais Buch.-Ham. ex Dillwyn Bignonia tetragona Wall. ex DC. Dipterosperma personatum Hassk. Stereospermum caudatum (DC.) Miq. Stereospermum colais (Buch.-Ham. ex Dillwyn) Mabb. Stereospermum hasskarlii Zoll. & Moritzi Stereospermum personatum (Hassk.) Chatterjee

Stereospermum tetragonum, the yellow snake tree, is 15–20 m tall, trunk 15–25 cm in diam, large leaves 25–50 cm; leaflets 3–6 on each side of midrib, long elliptic, 8-14 X 2.5–6 cm. Large, pale yellow, trumpet shaped flowers occur in panicles. Flowers are pale yellow, slightly curved, about 2 cm, upper lip 2-lobed, lower lip 3-lobed, tomentose at mouth, tube terete. The fruit is long, 4-angular, slightly curved, 30–70 cm, about 1 cm in diameter. This, probably, is the source of its common name, snake tree.

Also known as Stereospermum colais, it is found in India, Myanmar and Sri Lanka: where it is "common in moist deciduous forests and occasional in openings or margins of evergreen forests, up to 1200 m."

In Vietnam, Stereospermum colais is known as quao núi. Its young leaves can be eaten as a vegetable in Vietnam's Central Highlands.