Fabaceae (pea, or legume family) » Acacia auriculiformis

commomly known as: English: auri, black wattle, Darwin black wattle, earleaf acacia, earpod wattle, northern black wattle, Papuan wattle, tan wattle, wattle • Maori (Cook Islands): akasia • Marathi: अकाशिया akashia, ऑस्ट्रेलियन बाभुळ Australian babhool • Pohnpeian: tuhkehn pwelmwahu

... this tree has no leaves except when it is a seedling. When the seedling first sprouts, it has twice pinnate leaves. Subsequent leaves have enlarged leaf stalks with a little bit of true leaves and by the fifth "leaflet", it's all leaf stalk and no leaf! What you see are flattened leaf stalks called phyllodes, which are green and function as leaves. These are an adaptation to hot climates and droughts.

Flowers in loose, yellow-orange spikes at leaf axils or in clusters of spikes at stem tips; flowers mimosa-like, with numerous free stamens ...