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22. Dichocarpum W. T. Wang & P. K. Hsiao, Acta Phytotax. Sin. 9: 323. 1964.
人字果属 ren zi guo shu
Fu Dezhi; Orbélia R. Robinson
Herbs perennial, erect. Rhizomes present. Stem scapoid, unbranched or few branched, with few leaves or leafless. Leaves basal or basal and cauline, pedately compound, 3--13-foliolate, rarely simple; central leaflet entire. Inflorescences cymose, terminal or axillary, 1--8-flowered; bracts usually 3-lobed. Flowers radially symmetric, bisexual, sometimes cleistogamous. Sepals 5, petaloid, usually white, seldom yellowish or pinkish. Petals 5, golden-yellow, much smaller than sepals, clawed. Stamens 5--25; filaments narrowly linear, 1-veined; anthers yellow. Pistils 2, connate at base; ovary narrowly oblong, many ovuled; styles persistent. Follicles 2, divaricate, apically beaked. Seeds nitid, sometimes somewhat rugose or rough.
About 15 species: China, N India, Japan, N Myanmar, Nepal; 11 species (endemic) in China.
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| 1 |
Rhizome inconspicuous; tap root long; petals funnelform; seeds ellipsoid-fusiform |
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11 D. fargesii |
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Rhizome 1--16 cm; tap root inconspicuous; petals flat (petals unknown in D. basilare, D. carinatum, and D. hypoglaucum); seeds globose to subglobose, rarely ellipsoid. |
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(2) |
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| 2 (1) |
Stem leaves present. |
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(3) |
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Stem leaves absent. |
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(6) |
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| 3 (2) |
Central leaflet rhombic to broadly rhombic-ovate, 1.8--6 × 1.5--5 cm |
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7 D. auriculatum |
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Central leaflet suborbicular, suborbicular-obovate, flabellate, or flabellate-obovate, 0.5--2.3 × 0.6--2.5 cm. |
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(4) |
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| 4 (3) |
Stamens 5 or 10 |
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10 D. arisanense |
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Stamens 20--45. |
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(5) |
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| 5 (4) |
Central leaflet suborbicular-obovate to flabellate-obovate; flowers 1.1--2.3 cm in diam. |
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8 D. sutchuenense |
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Central leaflet suborbicular to subflabellate; flowers 0.4--0.6 cm in diam. |
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9 D. franchetii |
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| 6 (2) |
Leaves 3-foliolate or sometimes simple; rhizome to 16 cm |
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1 D. trifoliolatum |
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Leaves (3)5--15-foliolate; rhizome 1--10 cm |
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(7) |
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| 7 (6) |
Leaves 5-foliolate, rarely 3-foliolate |
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2 D. basilare |
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Leaves 7--15-foliolate. |
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(8) |
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| 8 (7) |
Rhizome 5--10 cm. |
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(9) |
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Rhizome 2--3(--5) cm. |
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(10) |
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| 9 (8) |
Leaflets abaxially pruinose; seeds inconspicuously ridged, smooth |
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3 D. hypoglaucum |
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Leaflets abaxially not pruinose; seeds conspicuously ridged, rugose |
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6 D. carinatum |
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| 10 (8) |
Central leaflet lanceolate |
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5 D. malipoenense |
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Central leaflet not lanceolate. |
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(11) |
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| 11 (10) |
Central leaflet rhombic |
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4 D. dalzielii |
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Central leaflet suborbicular, suborbicular-obovate, flabellate-obovate, or subflabellate. |
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(12) |
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| 12 (11) |
Central leaflet suborbicular-obovate to flabellate-obovate; flowers 1.1--2.3 cm in diam. |
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8 D. sutchuenense |
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Central leaflet suborbicular to subflabellate; flowers 0.4--0.6 cm in diam. |
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9 D. franchetii |
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List of lower taxa
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