physiological property
Woody vines are hairless except for the yellow-brown fur on inflorescences and tender parts. Pinnate compound leaves; There are 7-9 leaflets, oval or ovate-lanceolate, 4-12cm long and 0/.5-5.5cm wide, with no hair on both sides and obvious reticular veins. Panicle terminal, drooping, yellow pubescence on the sequence axis, many and dense flowers, solitary on the sequence axis node; Calyx bell-shaped, with short blunt teeth; Corolla purple or rose red, glabrous. The pod is oblate, with a length of15cm and a width of about 2cm. The petals of fruit are almost woody, and the seeds are contracted. Seeds oblate. The flowering and fruiting period is from July to 65438+ 10.