Shrubs [or trees], (0.2–)10–20 dm. Stems few to many, erect or spreading; bark purplish brown, blackish brown, purplish black, or purple, with scattered pale brown lenticels; long and short shoots present; thorns present; glabrous or hairy young, ?smooth older?; ?buds triangular-ovoid, apex obtuse or acute, scale margins glabrous or hairy?. Leaves deciduous or semipersistent, cauline, simple; stipules persistent, free, reniform or suborbiculate, rarely ovate, ?leaflike?, margins serrate or crenate-serrate; petiole present; blade spatulate, obovate, elliptic, or ovate, 3–9 cm, firm or leathery, margins flat, serrate or crenate-serrate, venation pinnate, surfaces glabrous, sometimes midvein abaxially. Inflorescences terminal ?on short branches, appearing lateral on branch as a whole?, [2 or]3–5[–10]-flowered, fascicles, glabrous or hairy; bracts present or absent; bracteoles present or absent. Pedicels present, short, or absent. Flowers opening before or with leaves, perianth and androecium epigynous, 25–50 mm diam.; hypanthium campanulate, ± constricted at mouth, 4–7 mm diam., exterior glabrous; sepals 5, reflexed or ascending, suborbiculate or ovate, ?abaxial surface glabrous, adaxial hairy?; petals 5, white, pink, or red, obovate or ovate to suborbiculate, ?base short-clawed, apex rounded?; stamens 40–60, equal to or 1/2 length petals; carpels 5, connate, adnate to hypanthium, indumentum not recorded, styles ?2–5?, terminal, basally connate 1/3 of length, ?nearly equal to stamens?; ovules 2. Fruits pomes, ?sessile?, yellow or yellowish green, globose, subglobose, or ovoid, 23–60 mm diam., ?5-locular?, glabrous; ?fleshy?; hypanthium persistent; sepals deciduous; carpels cartilaginous; styles deciduous. Seeds 10 per locule. x = 17.
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Deciduous or semi-evergreen shrubs or small trees, usually armed with spines; stems erect to spreading, sometimes hairy when young. Lvs distributed along young main stems, often in fascicles on short shoots along older stems, shortly petiolate, simple, serrate or crenate; stipules reniform and sometimes large and conspicuous on young shoots, persistent, but caducous on lvs of older wood. Fls solitary or fascicled, distributed along stems, those on older wood appearing before lvs and those on younger wood usually appearing with or after lvs, 5-merous, usually ☿ sometimes ♂, sessile or subsessile, showy. Hypanthium tubular, closed at apex. Epicalyx 0. Calyx 5-merous. Petals 5, moderately large, spreading, usually pink to red, sometimes white. Stamens 40-60. Ovary inferior, sunken in the hypanthium; carpels 5; styles 5, fused only at base or up to 1/2 of length; ovules many. Fr. an ovoid to subglobose or pyriform pome with leathery carpel walls and some stone cells in flesh near ovary; seeds many in each locule.
Shrubs, subshrubs, or small trees, deciduous or evergreen, sometimes with thorny branches; buds small, with 2 exposed scales. Leaves simple, alternate, shortly petiolate, stipulate, herbaceous, venation camptodromous, margin serrate or crenate. Flowers solitary or fascicled, precocious or coetaneous. Sepals 5, caducous, margin entire or serrate. Petals 5. Stamens 20 or more, 2-whorled. Ovary 5-loculed, with many ovules per locule, 2-seriate; styles 2–5, connate at base. Fruit a pome, large, many seeded, often with persistent incurved styles; seed brown, seed coat leathery, albumen absent.
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