Malus kansuensis

Malus kansuensis is a species in the genus Malus in the family Rosaceae, called with the common name Calva crabapple. A tree of this variety would produce a yellow fruit in the size a half an inch. The white flowers are about 2 inches across.

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Description Small tree or shrub, 3 ‒ 8 m high. Branches terete, pubescent when young, glabrescent. Leaves petiolate, petiole ca 1.9 ‒ 2.6 cm long, pubescent when young, puberulous or glabrescent. Lamina ca 4.9 ‒ 5.4 × 3.6 ‒ 3.9 cm, oval to ovate, base rounded, truncate or cordate, equilateral, apex acute or acuminate, margin crenate to serrulate, blade puberulous or glabrous, usually 3 - lobed. Inflorescence corymbose, with 4 ‒ 10 flowers. Pedicel ca 2.2 ‒ 2.9 cm long, glabrous or pubescent when young then glabrescent. Hypanthium puberulous or glabrous. Sepals triangular, abaxially glabrous, adaxially puberulous, caducous. Petals ca 0.7 × 0.5 cm, white, obovate. Stamens ca 20, unequal. Styles 3, rarely 2 or 4, longer than stamens, glabrous or puberulous. Pome ca 1.0 ‒ 1.5 cm in diameter, ellipsoidal, yellow to red, with fruit spots. Carpopodium ca 2.6 ‒ 3.6 cm long, glabrous or puberulous.

Chromosome number 2 n = 34.

Figs 39 – 40

Phenology Flowers from May to June. Mature fruits from July to August. Habitat Terrestrial, seasonally green, growing in mixed forests or shrubs; 1500 ‒ 3300 m a. s. l.

Distribution China (Anhui, Chongqing, Gansu, Henan, Hubei, Hunan, Jiangxi, Ningxia, Qinghai, Shanxi, Shaanxi, Sichuan, Tibet) (Fig. 39).