"Alamanda Blue" likely refers to a blue-flowered variety of the Allamanda plant, which is a tropical, fast-growing climber with glossy, leathery leaves and trumpet-shaped flowers, typically known for its yellow or golden hues. 

Here's a more detailed description:

General Characteristics:

Plant Type: A tropical, evergreen climber or shrub, often grown as a decorative plant. 

Leaves: Glossy, leathery, and oblong-lanceolate in shape, typically green to yellow-green. 

Flowers: Large, trumpet-shaped flowers with five petals, often with a distinct throat color. 

Growth Habit: Vigorous and fast-growing, capable of climbing on trellises, walls, or fences. 

Bloom Time: Flowers freely throughout the year in warmer climates. 

Toxicity: All parts of the plant, including the sap, contain toxic compounds that can cause skin irritation and are harmful if ingested. 

Cultivars: Besides the classic yellow-flowered Allamanda cathartica, there are cultivars with variations in flower color, including 'Hendersonii' (deep golden yellow), 'Alba' (white flowers), and 'Cherries Jubilee' (red-orange flowers). 

Blue-Flowered Variety (Alamanda Blue):

Appearance:

While the classic Allamanda is known for yellow or golden flowers, "Alamanda Blue" likely refers to a cultivar or hybrid with blue or blue-violet flowers. 

Care:

Allamanda plants, including blue-flowered varieties, require well-draining soil, regular watering, and plenty of sunlight. 

Uses:

Commonly used as ornamental plants in gardens and landscapes, often trained to climb on structures. 

Maintenance:

Regular pruning is beneficial to control growth and promote better flowering. 

Propagation:

Can be propagated from cuttings.