

How to identify Yellow oleander (Cascabela thevetia)
Yellow oleander, also known as Milk tree
Yellow oleander is characterized by its stature as an evergreen shrub or small tree, which can grow to an impressive 8 feet (2.4 meters) with a spread of about 4 feet (1.2 meters). It features glossy, lance-shaped leaves that contribute to its tropical appearance. Its signature bell-shaped flowers bloom in a vibrant yellow and are key identifiers among plant enthusiasts. The fruit is a heart-shaped drupe, adding to its aesthetic appeal.
Large, funnel-shaped flowers in vibrant yellow to apricot hues, blooming in terminal clusters.
Transitioning fruit from green to black, with a triangular shape and two nut-like kernels.
Linear-lanceolate leaves with a waxy texture, spiral arrangement, and glossy appearance.
Stem starting green, maturing to silver-gray, moderately thick, and symmetrical branching pattern.
Evergreen shrub or small tree reaching 8 feet (2.4 meters) with lance-shaped glossy leaves.
The leaves of yellow oleander are willow-like and linear-lanceolate, ranging from 6 to 7 inches (15 to 18 cm) in length and 0.2 to 0.4 inches (0.5 to 1 cm) in width. These glossy green leaves have a distinctive midrib and are closely spaced in a spiral arrangement along the stem. The waxy texture minimizes water loss, making them well-suited for various environments. Their linear shape, length, and spiral arrangement are key features for identifying yellow oleander.
Yellow oleander's flowers are large, funnel-shaped, and vibrant yellow to apricot in color. Measuring about 3 inches (7.5 cm) in length and 1 to 1.5 inches (2.5-4 cm) in width, these fragrant flowers form terminal clusters known as cymes. They bloom from summer to fall, with each flower lasting a single day, opening in the morning and closing by afternoon. The flowers' sweet scent and distinct shape make them a key feature for identifying yellow oleander.
The stem of yellow oleander is initially green, transforming to a distinguished silver-gray with age. Typically smooth and cylindrical, it can grow up to 6 feet (183 cm) in height and features a moderately thick structure. The branching pattern is fairly symmetrical, with lateral branches arising at regular intervals, giving the plant a balanced appearance. Juvenile stems are tender and pliable, while mature ones become woody and rigid. The surface remains relatively smooth, lacking significant texture variations.
The fruit of yellow oleander transitions from green to black as it matures, developing a soft and juicy texture akin to a plum. Each roughly triangular fruit measures about 1.2 - 1.8 inches (3 - 4.5 cm) across. Inside, a hard stone encases typically two nut-like kernels, which rest within the mature, fleshly fruit. The stark color shift upon ripening, from vibrant green to deep black, coupled with its distinctive shape, marks its readiness for dispersion.
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Scientific Classification of Yellow oleander