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3. Saurauia Willdenow, Ges. Naturf. Freunde Berlin Neue Schriften. 3: 407. 1801.
水东哥属 shui dong ge shu
Trees or shrubs. Branchlets usually with unguiculate hairs or subulate scales. Leaves petiolate; petiole scaly or not, rarely long setose; leaf blade tomentose or not abaxially, veins with scales or stiff hairs, numerous lateral veins diverging parallel to midvein, margin serrate. Inflorescences thyrsoid, paniclelike, composed of terminal cymes, solitary or fasciculate, usually scaly, tomentose or glabrous. Pedicels 2-bracteate. Flowers hermaphroditic or plants functionally dioecious. Sepals 5, strongly imbricate. Petals 5, imbricate, usually connate at base. Stamens 15-130; filaments adnate to base of petals; anthers obtrigonal, dorsifixed, dehiscing longitudinally or poricidally. Ovary 3-5-loculed, with many ovules per locule; styles 3-5, connate below middle, rarely free; stigma simple to discoid. Fruit baccate, white to pale green, rarely red, globose or depressed-globose, usually ribbed. Seeds brown, minute, areolate.
About 300 species: Asia and the Americas, principally in tropical regions; 13 species (seven endemic) in China.
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| 1 |
Branchlets and petioles hirsute or setose, without scales |
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(2) |
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Branchlets and petioles with unguicular or subulate scales |
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(3) |
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| 2 (1) |
Branchlets and petioles ferruginous long setose; stamens ca. 39. |
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12 S. macrotricha |
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Branchlets and petioles hirsute; stamens 50-90. |
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13 S. sinohirsuta |
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| 3 (1) |
Leaves abaxially not tomentose or lanate |
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(4) |
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Leaves abaxially tomentose or lanate |
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(8) |
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| 4 (3) |
Leaves adaxially at least setose on midvein |
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(5) |
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Leaves adaxially not setose |
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(6) |
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| 5 (4) |
Cymose inflorescences in axils of leaves on young branchlets, 8-12 cm, ca. 13-flowered. |
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7 S. thyrsiflora |
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Cymose inflorescences in axils of fallen leaves on old branches, 1-5 cm, 1-3-flowered. |
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8 S. tristyla |
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| 6 (4) |
Inflorescences paniculate, 7-33 cm. |
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9 S. polyneura |
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Inflorescences cymose or flowers solitary, less than 3 cm |
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(7) |
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| 7 (6) |
Flowers 3.5-4 cm in diam., solitary. |
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10 S. cerea |
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Flowers ca. 0.8 cm in diam., on cymose inflorescences. |
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11 S. yunnanensis |
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| 8 (3) |
Abaxial tomentum thickly ferruginous tomentose or lanate |
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(9) |
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Abaxial tomentum sparsely brownish scurfy-tomentose |
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(10) |
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| 9 (8) |
Inflorescences paniculate on young branchlets; sepals hairy; leaves with 37-40 pairs of lateral veins. |
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1 S. griffithii |
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Inflorescences cymose in axils of fallen leaves on old branches; sepals glabrous; leaves with 23-30 pairs of lateral veins. |
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2 S. miniata |
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| 10 (8) |
Inflorescences paniculate, 12-33 cm; leaves with 28-40(-46) pairs of lateral veins. |
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3 S. napaulensis |
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Inflorescences cymose, 3-7 cm; leaves with 20-34 pairs of lateral veins |
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(11) |
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| 11 (10) |
Branchlets sparsely brown or ferruginous velutinous; styles 4- or 5-fid above middle. |
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4 S. erythrocarpa |
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Branchlets only with unguicular scales; styles 5-fid above middle |
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(12) |
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| 12 (11) |
Leaf blade ovate, with 26 pairs of lateral veins; inflorescences in axils of fallen leaves on old branches; bracts elliptic, 2-3 mm; flowers 5-8 mm in diam. |
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5 S. rubricalyx |
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Leaf blade narrowly elliptic to oblong-elliptic, with 25-34 pairs of lateral veins; inflorescences in axils of leaves on young branchlets; bracts broadly ovate, ca. 4 mm; flowers 1.8-2 cm in diam. |
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6 S. punduana |
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List of lower taxa
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