Coolibah

Trees, to 10 m; trunk grayto tan, rough; bark fissured. Leaves: petiole 1.4–2 cm; blade dull bluish gray-green, narrowly lanceolate, 8–17 × 0.8–2.5 cm, surfaces rarely glaucous. Peduncles 0.5–2.8 cm. Inflo­rescences 7-flowered, terminal, umbels in panicles. Flowers: hypan­thium obconic, ± 2 mm, length ± equaling calyptra; calyptra obconic, apiculate; stamens white. Capsules hemispheric, 3–5 mm, to 6 mm wide; valves 3 or 4, exserted.

Flowering spring–summer. Urban ephemeral water­ways; 300–400 m; introduced; Ariz.; n Australia.

Eucalyptus coolabah is an escape along the occasionally flooded Salt River and its tributaries near Phoenix. It is similar to E. microtheca F. Mueller and commonly sold under that name.