There were formerly two different species of Clerodendrum but they have both been put under this genera Volkameria.
Formerly Clerodendrum aculeatum var. aculeatum
Some have leaves 6 cm long or more, 2 cm broad; corolla-tube more than 15 mm long; fruits 5 mm in diameter like above
Formerly Clerodendrum aculeatum var. gracile
Others have leaves 3 cm long and up to 0.8 cm broad; corolla tube 10 mm long or less; fruits 4 mm in diameter.
Flowering time; Most of the year
Distribution; GC, CB, LC
Habitat; Dry rocky and open or disturbed areas. It loves the sun.
Notes; Horticultural potential; This graceful 4' X 4' shrub has blooms in profusion. It loves dry sunny situation, it is armed; when planted under a window the spines offer good protection.