9. Eucalyptus polyanthemos Schauer in W. G. Walpers, Repert. Bot. Syst. 2: 924. 1843.
Silver dollar gum, red box
Trees, to 25 m; trunk gray or tan, smooth or rough; bark rough, fibrous, and persistent, or smooth and shed in flakes or irregular strips. Leaves: petiole 1–2.5 cm; blade grayish green, silver, or bluish green, round, elliptic, or ovate, 5–10 × 1.5–5 cm, surfaces occasionally glaucous. Peduncles 1–4 cm. Inflorescences 5–7-flowered, terminal or axillary, umbels in panicles. Flowers: hypanthium ovoid to obconic, ca. 4 mm, length ca. 2 times calyptra; calyptra conic to hemispheric; stamens white; anthers rigid on filaments, adnate, absent on outer filaments. Capsules ovoid or subpyriform, 5–6 mm, to 6 mm wide, glaucous; valves 3 or 4, included.
Flowering winter–spring. Disturbed coastal urban areas; 0–200 m; introduced; Calif.; se Australia.
Eucalyptus polyanthemos is known from the San Joaquin Valley, Central Coast, San Francisco Bay Area, Outer South Coast Ranges, South Coast, Santa Catalina Islands, and Western Transverse Ranges.
Juvenile, adult, and transitional leaves are occasionally found in crowns of mature naturalized trees.