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FOC | Family List | FOC Vol. 9 | Hamamelidaceae

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.

1 Leaf blade with 3 main basal veins, abaxial surface persistently densely stellately tomentose; floral cup as long as capsule.   1 D. laurifolia
+ Leaf blade without 3 main basal veins, abaxial surface glabrous or glabrescent; floral cup 1/3–1/2 as long as capsule.   (2)
2 (1) Leaf blade narrowly lanceolate, less than 2 cm wide.   5 D. salicifolia
+ Leaf blade elliptic, obovate or ovate-oblong, 2–6 cm wide.   (3)
3 (2) Leaf blade elliptic or obovate, apex rounded or obtuse, 3–6 cm.   4 D. tutcheri
+ Leaf blade oblong, ovate-oblong, apex acuminate or bluntly acuminate, 5–13 cm.   (4)
4 (3) Leaf blade 5–7 × 2–5 cm.   2 D. dunnii
+ Leaf blade 9–13 × 3–6 cm.   3 D. yunnanensis

Lower Taxa


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