赤桉 chi an

Trees, to 25 m tall. Bark dark gray, white, brown, or red, smooth, exfoliating. Branches sometimes pendulous, terete, youngest parts ridged. Young leaves opposite; leaf blade broadly lanceolate, 6-9 × 2.5-4 cm. Mature leaves with a slender 1.5-2.5 cm petiole; leaf blade narrowly lanceolate to lanceolate, 6-30 × 1-2 cm, slightly twisted, thinly leathery, both surfaces with small black glands, secondary veins at an angle of ca. 45° from midvein, intramarginal veins ca. 0.7 mm from margin. Inflorescences axillary, simple, umbels 5-11-flowered; peduncle 1-1.5 cm, slender, terete. Flower buds ovoid, 5-8 mm. Hypanthium semiglobose, ca. 3 mm; stipe 3-12 mm; calyptra hemispheric, rostrate to obtusely conic, 5-7 mm, apically constricted, apex obtuse, acute, or acuminate and beaked or not. Stamens 5-7 mm; anthers elliptic, dehiscing longitudinally. Capsule subglobose, 5-6 mm in diam.; disk broad; valves (3 or)4(or 5), exserted from hypanthium. Fl. Dec-Aug.

Cultivated in Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hunan, Jiangxi, Sichuan, Taiwan, Yunnan, and Zhejiang [native to Australia, where widespread].

The varieties Eucalyptus camaldulensis var. camaldulensis , E. camaldulensis var. acuminata (Hooker) Blakely, E. camaldulensis var. brevirostris (F. Mueller ex Miquel) Blakely, E. camaldulensis var. obtusa Blakely, and E. camaldulensis var. pendula Blakely & Jacobs are all cultivated in China.