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12. DISTYLIOPSIS P. K. Endress, Bot. Jahrb. Syst. 90: 30. 1970.
假蚊母树属 jia wen mu shu shu
Trees, evergreen, up to 15 m tall; branches with 1 prophyll, young shoots and petioles stellately tomentose or with sessile peltate scales; buds perulate. Leaves distichous (rarely spiral), shortly petiolate; stipules ovate or elliptic, caducous, leaving small scars; leaf blade often oblanceolate, leathery, base cuneate, margin entire or nearly so, venation pinnate, sometimes with 3 basal veins, often glabrescent. Plants andromonoecious. Inflorescence a condensed panicle or botryoid, each axis terminated by a flower, axillary or terminal on short lateral branches, few-flowered; bracts 3-lobed. Flowers male or bisexual, distichously (or rarely spirally) arranged. Floral cup urceolate to cupshaped, subtended by (often stipulate) sepal-like bracts, often ± ascending on one side. Male flowers sessile, bisexual flowers often pedicellate. Sepals and petals absent. Stamens (1–)5–6(–15), anther thecae 2-sporangiate, each dehiscing by a longitudinal slit. Male flowers with reduced carpels. Ovary superior, enclosed by long floral cup, ovules 1 per locule; stigmas decurrent. Capsules arranged distichously (rarely spirally) along rachis, partly stalked. Seeds ellipsoid.
About six species: China, Laos, Malaysia, New Guinea; five species (four endemic) in China.
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| 1 |
Leaf blade with 3 main basal veins, abaxial surface persistently densely stellately tomentose; floral cup as long as capsule. |
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1 D. laurifolia |
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Leaf blade without 3 main basal veins, abaxial surface glabrous or glabrescent; floral cup 1/3–1/2 as long as capsule. |
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(2) |
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| 2 (1) |
Leaf blade narrowly lanceolate, less than 2 cm wide. |
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5 D. salicifolia |
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Leaf blade elliptic, obovate or ovate-oblong, 2–6 cm wide. |
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(3) |
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| 3 (2) |
Leaf blade elliptic or obovate, apex rounded or obtuse, 3–6 cm. |
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4 D. tutcheri |
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Leaf blade oblong, ovate-oblong, apex acuminate or bluntly acuminate, 5–13 cm. |
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(4) |
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| 4 (3) |
Leaf blade 5–7 × 2–5 cm. |
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2 D. dunnii |
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Leaf blade 9–13 × 3–6 cm. |
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3 D. yunnanensis |
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Lower Taxa
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