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3. Fallopia Adanson, Fam. Pl. 2: 277, 557. 1763.
首乌属 shou wu shu
Li Anjen (李安仁 Li An-ren); Chong-wook Park
Bilderdykia Dumortier; Pleuropterus Turczaninow.
Herbs annual, rarely subshrubs. Stems twining. Leaves simple, alternate, petiolate; leaf blade ovate or cordate, margin entire; ocrea tubular, apex oblique or truncate. Inflorescence racemose or paniculate. Flowers bisexual. Perianth persistent, 5-parted; outer 3 tepals larger, keeled or winged, rarely without keels or wings. Stamens 8. Styles very short; stigmas capitate. Achenes trigonous, ovoid.
Between seven and nine species (but ca. 20 if taken more broadly to include Reynoutria): widespread in N temperate zone; eight species (three endemic) in China.
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| 1 |
Annual herb; inflorescence a raceme. |
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(2) |
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Perennial herb or subshrub; inflorescence paniculate. |
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(4) |
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| 2 (1) |
Tepals outer 3 keeled or narrowly winged on abaxial surface, slightly accrescent in fruit. |
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1 F. convolvulus |
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Tepals outer 3 winged on abaxial surface, accrescent in fruit. |
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(3) |
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| 3 (2) |
Wings dentate; perianth (including wings) in fruit obovate; achenes minutely granular-striate, slightly shiny. |
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2 F. dentatoalata |
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Wings entire; perianth (including wings) in fruit orbicular; achenes smooth, shiny. |
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3 F. dumetorum |
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| 4 (1) |
Subshrub; leaves clustered. |
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4 F. aubertii |
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Perennial herb; leaf solitary or leaves alternate. |
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(5) |
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| 5 (4) |
Leaves alternate; achenes 3.9-4.8 mm. |
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8 F. forbesii |
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Leaf solitary; achenes to 3 mm. |
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(6) |
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| 6 (5) |
Tepals: outer 3 winged on abaxial surface, accrescent in fruit. |
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5 F. multiflora |
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Tepals not winged, not accrescent in fruit. |
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(7) |
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| 7 (6) |
Stems glabrous, sparsely papillate; leaf ovate-triangular; tepals 3-4 mm. |
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6 F. denticulata |
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Stems densely brown pilose and sparsely hirsute or glabrescent; leaf broadly cordate or broadly hastate-cordate; tepals 1.5-2 mm. |
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7 F. cynanchoides |
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List of lower taxa
| Related Links (opens in a new window) |
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Treatments in Other Floras @ www.efloras.org
Other Databases
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