Sorbus cuspidata (Spach) Hedl.

Records for Bhutan probably refer to Sorbus thibetica (Fl. Bhutan 1(3): 595. 1987).

Shrubs 7–8 m tall. Branchlets purplish brown when young, grayish brown when old, grayish white tomentose when young, glabrous when old; buds ovoid, 0.7–1.4 cm, glabrous, apex acute; scales imbricate, several, brown. Leaves simple; petiole 1–2.5 cm, stout, white tomentose; stipules brownish, lanceolate, 0.8–1.2 cm, membranous, tomentulose; leaf blade elliptic, 12–22 × 7–12 cm, lateral veins 10–15 pairs, nearly parallel and terminating in marginal teeth, abaxially densely white tomentose, adaxially puberulent when young, glabrate, base rounded or broadly cuneate, margin unevenly serrate or doubly serrate, sometimes ± lobed, apex acute or ± obtuse, rarely shortly acuminate. Compound corymbs 5–8 × (5–)7–10 cm, 30–45-flowered; rachis and pedicels initially white tomentose, glabrescent. Pedicel 5–8 mm. Flowers 7–8 mm in diam. Hypanthium campanulate, abaxially white pubescent except at base. Sepals triangular or lanceolate, 2.5–3 × 1.5–2.5 mm, apex acute. Petals white, obovate, 6–8 × 4–6 mm, adaxially puberulent, base shortly clawed. Stamens 20–25, slightly shorter than petals; anthers purple. Styles 3–5, basally connate and tomentose. Fruit dark red, globose, 1.5–2 cm in diam., 3–5-loculed, with many conspicuous lenticels; sepals persistent; seeds brown, lanceolate, compressed, 7–8 × 3–4 mm. Fl. Jun–Jul, fr. Aug–Sep.

Himalaya (Kumaun to Sikkim).

Xizang [?Bhutan, India, Myanmar, Nepal, Sikkim].

2700-3700 m

Forests on slopes, forest margins; 2000--3500 m.

Crataegus cuspidata Spach, Hist. Veg. Phan. 2: 106. 1834; Pyrus crenata Lindley (1835), not D. Don (1825); P. vestita Wallich ex J. D. Hooker.

Flowering from June to July; fruiting from August to September.

Sorbus cuspidata is occurring in Xizang of China, India, Myanmar, Nepal, Sikkim.

Recent studies (Robertson et al., 1991; Potter et al., 2007; Campbell et al., 2007) treat Sorbus in a narrower sense to include only the pinnate-leaved species of subgenus Sorbus, raising several of the other subgenera to generic rank.

Shrubs 7-9 m tall. Branchlets purplish brown when young, grayish brown when old, grayish white tomentose when young, glabrous when old; buds ovoid 1-1.5 cm long, glabrous, apex acute; scales imbricate, several, brown. Leaves simple; petiole 1-3 cm long, stout, white tomentose; stipules brownish, lanceolate, membranous, tomentulose; leaf blade elliptic, 15-25 cm long, 8-13 cm wide, lateral veins 10-15 pairs, nearly parallel and terminating in marginal teeth, abaxially densely white tomentose, adaxially puberulent when young, glabrate, base rounded or broadly cuneate, margin unevenly serrate or doubly serrate, sometimes lobed, apex acute or obtuse, rarely shortly acuminate. Compound corymbs 30-50-flowered; rachis and pedicels initially white tomentose, glabrescent. Pedicel ca. 5-10 mm long. Flowers ca. 6-10 mm in diameter. Hypanthium campanulate, abaxially white pubescent except at base. Sepals triangular or lanceolate, apex acute. Petals white, obovate, adaxially puberulent, base shortly clawed. Stamens 20-25, slightly shorter than petals; anthers purple. Styles 3-5, basally connate and tomentose. Fruit dark red, globose, 3-5-loculed, with many conspicuous lenticels; sepals persistent; seeds brown, lanceolate, compressed.

Growing in forests on slopes, forest margins; 1800-3200 m.

Sorbus cuspidata là loài thực vật có hoa trong họ Hoa hồng. Loài này được (Spach) Hedl. miêu tả khoa học đầu tiên năm 1901.

白叶花楸（学名：Sorbus cuspidata）是蔷薇科花楸属的植物。分布于印度、不丹、缅甸、尼泊尔以及中国大陆的西藏等地，生长于海拔2,000米至3,500米的地区，多生长于林内，目前尚未由人工引种栽培。