In what environment does yellow oleander grow most advantageously?

Alternate names of the yellow oleander

The yellow oleander, an upright shrub plant, is also called yellow orchid oleander.

Origin of the yellow oleander

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

Morphological characteristics of the yellow oleander

The yellow oleander is about 1-2 m tall, has milky sap, and its branches are grayish-white.

The leaves are in whorls 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 of the leaf, which have 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 anastomose before reaching the margin; the petiole is very short, and there are glands at the base and in the axils.

The cyme of the yellow oleander is terminal, the pedicel has fine hairs, the flowers are yellow, 4-6 cm long, with an opening diameter of about 4 cm; the bracts are lanceolate and 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, no more than 2 cm long and 2-4 mm in diameter, swollen at the base, and the throat expands upward into a limb about 3 cm long and about 1.5 cm in diameter; the top of the limb is 5-lobed, the corolla lobes overlap to the left, the lobes are ovate or circular with obtuse tips, 1.6-2.0 cm long and about 1.7 cm wide.

The yellow oleander has 5 stamens, borne in the throat of the corolla tube; the filaments are relatively short and have fine hairs at the base; the anthers are ovate with relatively obtuse tips; the disk is fleshy and entire; the ovary is entire, 1-locular; the style is filiform, the stigma tip is obtuse, and the base is annular.

The capsule of the yellow oleander 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.