"pachypodium bicolor" is a succulent plant, as are all "pachypodium." it grows normally in height with a densely branched crown that is up to approximately broad in diameter. each branch is cylindrical and measures in diameter at the base. the branch comes from low down on the base of the plant. the branches are covered with leaf scars and the remains of spines. beyond their base, the branches measure in diameter. pale-grey in color, the bark is smooth. branchlets from long and in diameter. they are covered with paired straight grey-brown spines long and in diameter at the base. the basal part, located at or near the base of a plant stem, is part of the spine and conical at 0.6 to 0.75 times the spine length. the young spines and the base of young leaves are densely white-lanate, having or consisting of woolly hairs.