Amazon.com : Pink Hawaiian Plumeria Cutting Tropical Houseplant : Patio, Lawn & Garden How to Grow and Care for Firespike Plants LON CAPA Flowering Plant Families, UH Botany Acacia podalyriifolia (Queensland Silver Wattle) is currently in full flower. One of the more popular Acacias, it is ideal as a screen as it retains its bushy shape and is fast growing. Elephant Foot Yam (Amorphophallus paeoniifolius) This incredible plant has been cultivated for millennia in its tropical distribution from India to Papua New Guinea and also Northern Australia. Whilst the tuber is the