The difference between Clerodendrum thomsoniae and Clerodendrum thomsoniae

1. Leaf Difference

The leaves of the Chinese giant thorn tree are papery, narrowly ovate or ovate-oblong in shape, 4 to 10 cm long, 1.5 to 4 cm wide, gradually becoming pointed at the apex, and the base is nearly round. The leaves are entire, with small warty hairs on the surface, slightly rough, and almost glabrous on the back. The petiole is about 1 to 2 cm long.

The leaves of the red-calyx Clerodendrum thomsoniae are opposite, papery, with petioles, ovate-elliptical in shape, entire, gradually tapering at the apex, and nearly round at the base.

2. Flower Differences

The inflorescence of the plant is axillary or pseudo-terminal, with dichotomous branches, about 7 to 15 cm long and about 10 to 17 cm wide. The involucral bracts are narrow lanceolate, the calyx is white, fused at the base, swollen in the middle, with 5 ridges, 5 deep fissures at the apex, the lobes are triangular-ovate, the corolla is dark red, and the lobes are elliptical.

The red-calyx cyme of the plant is axillary or terminal, with red calyx and corolla.