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21. CHAENOMELES Lindley, Trans. Linn. Soc. London, Bot. 13: 96, 97. 1821.
木瓜属 mu gua shu
Gu Cuizhi (Ku Tsue-chih); Stephen A. Spongberg
Pseudochaenomeles Carrière; Pseudocydonia C. K. Schneider.
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.
About five species: E Asia; five species (three endemic) in China.
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| 1 |
Branches unarmed; flowers solitary, coetaneous; sepals reflexed; stipules ovate-lanceolate, margin glandular serrate. |
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1 C. sinensis |
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Branches armed; flowers fascicled, precocious or coetaneous; sepals erect, rarely reflexed; stipules herbaceous, reniform or auriculate, margin serrate. |
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(2) |
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| 2 (1) |
Leaf margin entire. |
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5 C. thibetica |
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Leaf margin serrate or crenate. |
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(3) |
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| 3 (2) |
Branchlets scabrous, verruculose when old; fruit small, 3–4 cm in diam., maturing early; leaf blade obovate to spatulate, margin crenate. |
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4 C. japonica |
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Branchlets smooth, not verruculose when old; fruit medium-sized to large, 5–8 cm in diam., maturing late; leaf blade ovate, elliptic, or lanceolate, margin serrate. |
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(4) |
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| 4 (3) |
Leaf blade ovate to narrowly elliptic, abaxially glabrous or initially slightly pubescent, margin sharply serrate; styles glabrous or slightly pubescent. |
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2 C. speciosa |
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Leaf blade elliptic or lanceolate, abaxially densely brown tomentose, margin aristate-serrate; styles basally pubescent or lanose. |
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3 C. cathayensis |
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Lower Taxa
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