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4. Orophea Blume, Bijdr. 18. 1825.
澄广花属 cheng guang hua shu
Authors: Bingtao Li & Michael G. Gilbert
Mezzettiopsis Ridley.
Trees or erect shrubs. Leaf blade often with pellucid dots. Inflorescences axillary or superaxillary, cymose, pedunculate or sessile, 1- or several flowered. Flowers bisexual. Sepals 3, smaller than outer petals. Petals 6, in 2 whorls, free, each whorl valvate; outer petals ovate or obovate, usually smaller than inner petals (± equal in Orophea hainanensis and O. laui); inner petals with base narrowly clawed, apical limbs lozenge-shaped and cohering by margins to form a mitriform cap, apex usually acute or acuminate and sometimes extended, thickened, and recurved. Stamens 3-14; anther locules ovoid, extrorse; connectives apically acute or obtuse but not truncate. Carpels 3-15, free; ovules 1-4 per carpel; stigmas sessile or subsessile, capitate or ellipsoid. Fruit apocarpous; monocarps shortly stipitate, usually globose or oblong, sometimes constricted between seeds. Seeds 1-4 per monocarp.
About 37 species: S and SE Asia; six species (three endemic) in China.
All the Chinese species of Orophea belong to O. subg. Sphaerocarpon Kessler, distinguished by carpels with 2(or 3) ovules per carpel producing globose monocarps with hemispherical seeds. Mezzettiopsis is included here following Leonardía and Kessler (Blumea 46: 141-163. 2001).
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| 1 |
Leaf blade base oblique; petals reddish or reddish yellow |
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(2) |
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Leaf blade base equilateral; petals white, yellowish green, or greenish |
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(3) |
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| 2 (1) |
Shrubs to 4 m tall; leaf blade base shallowly cordate, abaxially hirsute; carpels 3-6; monocarps villous. |
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1 O. hirsuta |
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Trees to 10 m tall; leaf blade base rounded, abaxially glabrous or glabrescent; carpels 12; monocarps glabrous. |
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2 O. polycarpa |
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| 3 (1) |
Leaf blade leathery; stamens 9-14; carpels hairy |
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(4) |
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Leaf blade papery; stamens 6-9; carpels glabrous |
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(5) |
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| 4 (3) |
Secondary veins of leaves 10-15 on each side of midvein; carpels 3; inner petals ± as long as outer petals. |
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3 O. yunnanensis |
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Secondary veins of leaves 7-11 on each side of midvein; carpels 9-18; inner petals much longer than outer petals, tips conspicuously recurved and thickened. |
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6 O. laui |
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| 5 (3) |
Shrubs 2-4 m tall; petioles, leaf blades abaxially, sepals, and petals outside pubescent; inner petals clearly longer than outer petals; carpels 3. |
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4 O. multiflora |
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Trees 6-8 m tall; petioles, leaf blades, sepals, and petals glabrous; inner and outer petals subequal; carpels 6. |
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5 O. hainanensis |
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Lower Taxa
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