The flowers of P. heterophylla are "white, scented, and tubular with anthers hidden within the tube." This species has also been observed rarely to have yellow flowers. They appear in many-flowered, fairly compact clusters on the plant. The flowers are small, each usually up to 8mm in size. The flowers are often described for their peculiar scent. Often seen draped over the tops of tall trees, the flowers are more recognisable by their scent than their appearance.
