Kapok with long fruit, scientific name Bombax insigne Wall. Like heat and low temperature, generally distributed in tropics and subtropics.
Deciduous trees, up to 20 meters high, with spineless trunks; Whether the young branches have thorns. 5 ~ 9 leaflets, nearly leathery, obovate or oblanceolate, short tapering, tapering at the base, villous along the midvein and lateral vein on the back, long10 ~15cm, wide 4 ~ 5cm; Petiole is longer than leaf, and petiole length is 1.2 ~ 1.6 cm.
Flowers are solitary near the top of deciduous branches, and the pedicel is 65438 0.9 cm long, stout and rod-shaped; Calyx is 3.8 ~ 5 cm long, thick leathery, altar-shaped, spherical, without obvious division, with nearly hairless outside and densely covered with filamentous hairs inside; Petals are fleshy, oblong or linear oblong, dull, boat-shaped,10 ~15cm long, 3cm wide, red, orange or yellow, with no hair inside and short silk hair outside; There are many stamens (150), the length of stamen tube is 1.2 cm, filaments are linear, and 5 bundles are integrated, which is shorter than petals; Ovary 5-loculed, style longer than filaments.
Capsule is chestnut brown, long cylindrical, hairless, 25 ~ 30 cm long, 3.5 ~ 5.5 cm thick, with 5 edges, and cracks along the edges when mature. The flowering period is March and the fruit ripens in April. ? [3]?
The obvious difference between this species and kapok is that the fruit is particularly long, which is 30 cm long and 5.5 cm thick in Yunnan specimens, with smooth peel and 5 edges; Filaments are thinner than kapok, equal in thickness from top to bottom, and petals are longer and narrower.