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Large, suckering, spiny shrub up to 3-(4) m high when mature and several m diam.; stems brownish olive, smooth, shining and glabrous when young, often forming dense thickets. Lvs distributed along length of first-year, non-flowering stems, and in fascicles on short shoots on older flowering stems; petiole 6-12 mm long, green or red-tinged, glabrous; blade obovate to elliptic, finely serrate to crenate, (30)-50-80-(100) × 20-50 mm, acute and often curled at tip, attenuate to petiole at base, glabrous, ± shining and deep green on upper surface, paler below; lvs of short shoots on flowering stems similar but smaller; stipules prominent, reniform, up to 12 × 20 mm, crenate. Fls in fascicles of (3)-4-5, 25-35 mm diam., ± sessile. Sepals fused at base; lobes broadly ovate to oblong, 3-5 mm long, green, glabrous, with hyaline ciliate margins. Petals 5, ± overlapping, suberect or spreading, broad-ovate to orbicular, 12-20 mm diam., shortly clawed; limb white to bright pink to scarlet. Stamens < petals; filaments coloured as in petals. Fr. up to 60 mm diam., ± broadly ovoid to subglobose but often misshapen, yellowish and often brown-speckled, indented at base and apex.
Shrubs, 2–20 dm. Branches purplish brown or blackish brown, smooth (not verrucose with age). Leaves: stipules of vegetative branches usually reniform or suborbiculate, rarely ovate, to 1 cm, margins serrate, ?teeth triangular?, apex acute; petiole 5–10 mm; blade ovate, elliptic, or narrowly elliptic, 3–9 × 1.5–5 cm, base cuneate to broadly cuneate, margins serrate, apex obtuse to acute, abaxial surface glabrous or hairy on veins. Flowers 30–50 mm diam.; sepals suborbiculate, rarely ovate, 3–4 mm; petals scarlet red, rarely pinkish or white, ovate or suborbiculate, 13–24 mm; stamens 40–50, equal to petals. Pomes yellow or yellowish green, globose or ovoid, 40–60 mm diam. 2n = 34 (China).
A shrub or small tree. It grows 1.8-2.5 m tall and spreads 2.5-3.7 m wide. The leaves are 10 cm long and 3.5 cm wide. The flowers are red and occur singly. They are 3-5 cm across. The flowers and fruit have short stalks. The fruit is small. They are 4-7 cm long. It smells like a quince. The fruit form on the older wood. There are some named cultivated varieties.
Rarely escapes from cult. It is a thorny shrub to 2(–3) m, with lustrous, oblong or elliptic, finely serrate lvs 4–8 cm, and red, pink, or white fls 4–5 cm wide. (C. lagenaria)
