Pachypodium lamerei is a cactus-like succulent with a thick, spiny gray trunk growing 2-5 m. high. When kept as houseplants, they are much smaller.
The trunk is covered with 5 cm long spines and the foliage is arranged spirally near ends of branches, with leaves about 10-40 x 3-10 cm. The star-shaped flowers are white with a yellow throat and sometimes red tinge, lightly fragrant and similar in appearance to those of plumeria. They grow in clusters and are about 25-65 mm long by 17-41 mm wide. The fruits are reddish brown and oblong (about 15 x 4 cm) and always grow in pairs.
RAPANARIVO, S., AND A. J. M. LEEUWENBERG. 1999. Pachypodium (Apocynaceae): Taxonomy, Habitats and Cultivation. Balkema.