What kind of plant is yellow allamanda? Let's get to know this woody plant

Alternative names of yellow allamanda

Yellow allamanda, an upright shrub plant, is also called yellow-lan-chan.

Origin of yellow allamanda

This variety is native to Brazil and is now widely cultivated in tropical regions. It is cultivated in gardens in Guangxi, Guangdong, Fujian, Taiwan, China and Beijing (in greenhouses).

Morphological characteristics of yellow allamanda

Yellow allamanda is about 1-2 m tall, has milky sap, and its branches are grayish white.

The leaves are whorled in groups of 3-5, entire, mostly elliptical or obovate-oblong, about 6-12 cm long and about 2-4 cm wide. The leaf tip is acuminate or acute, the base is cuneate, the upper surface of the leaf is dark green, and the underside is light green. Except for the midvein and lateral veins on the underside having fine hairs, the rest is hairless.

The veins are flat on the upper leaf surface and raised on the underside; there are 7-12 lateral veins on each side, which form a network before reaching the margin; the petiole is very short, and there are glands at the base and in the axils.

The cyme of yellow allamanda is terminal, the pedicel has fine hairs, the flowers are yellow, 4-6 cm long, with an opening diameter of about 4 cm, and the bracts are lanceolate, borne at the base of the pedicel.

The corolla is funnel-shaped, with reddish-brown stripes inside. The lower part of the corolla is cylindrical, not more than 2 cm long, 2-4 mm in diameter, and swollen at the base. The throat expands upward into the limb, about 3 cm long and about 1.5 cm in diameter. The top of the limb is 5-lobed, and the corolla lobes overlap to the left. The lobes are ovate or round, with a blunt tip, 1.6-2.0 cm long and about 1.7 cm wide.

Yellow allamanda has 5 stamens, growing in the throat of the corolla tube. The filaments are relatively short, with fine hairs at the base. The anthers are ovate and relatively blunt at the tip. The disk is fleshy and entire, the ovary is entire, 1-locular, the style is filiform, the stigma is blunt at the tip and ring-shaped at the base.

The capsule of yellow allamanda is spherical, with long spines, about 3 cm in diameter. The seeds are flat, with a membranous margin, about 2 cm long and about 1.5 cm wide. The flowering period is from May to August, and the fruiting period is from October to December.