江南花楸 jiang nan hua qiu

Micromeles hemsleyi C. K. Schneider, Ill. Handb. Laubholzk. 1: 704. 1906; Aria hemsleyi (C. K. Schneider) H. Ohashi & H. Iketani; A. xanthoneura (Rehder) H. Ohashi & H. Iketani; M. schwerinii C. K. Schneider; Pyrus xanthoneura (Rehder) Cardot; Sorbus henryi Rehder; S. xanthoneura Rehder.

Trees or shrubs, 7–10 m tall. Branchlets dark reddish brown when young, brown when old, terete, glabrous, prominently lenticellate; buds ovoid or narrowly ovoid, apex acute; scales several, dark red, glabrous. Leaves simple; petiole 1–2 cm, slightly tomentulose when young, later glabrous; leaf blade dark green adaxially, ovate to narrowly elliptic-ovate, rarely narrowly elliptic-obovate, 5–11(–15) × 2.5–5.5(–8) cm, lateral veins 12–14 pairs, nearly parallel and terminating in marginal teeth, raised abaxially, abaxially grayish white tomentose, glabrous only along midvein and lateral veins, adaxially glabrous, base cuneate, rarely subrounded, margin serrulate and somewhat recurved, apex acute or shortly acuminate. Compound corymbs terminal, 3–4 × 3.5–5 cm, (15–)20–30-flowered; rachis and pedicels grayish white tomentose. Pedicel 5–12 mm. Flowers 1–1.2 cm in diam. Hypanthium campanulate, abaxially densely grayish white tomentose. Sepals triangular-ovate, 1.5–2.5 mm, apex acute to shortly acuminate. Petals pale green, broadly ovate to oblong, 3–5 × 2–3(–4) mm, adaxially tomentulose, apex obtuse or somewhat emarginate. Stamens 20, unequal in length, long ones ca. as long as petals. Styles 2 or 3, not exceeding stamens, basally connate and grayish white tomentose. Fruit russet, subglobose, 5–8 mm in diam., with distinct small brownish lenticels; sepals persistent. Fl. May–Jun, fr. Jul–Sep.

Dry forests on slopes, evergreen broad-leaved forests; 900--3200 m. Anhui, Fujian, Gansu, ?Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, Yunnan, Zhejiang.

One of us (Spongberg) believes that Sorbus henryi (Micromeles schwerinii) is distinct from S. hemsleyi and should be recognized.