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25. Disporum Salisbury, Trans. Hort. Soc. London. 1: 331. 1812.
万寿竹属 wan shou zhu shu
Liang Songyun (梁松筠 Liang Song-jun); Minoru N. Tamura
Drapiezia Blume.
Herbs perennial, often shortly rhizomatous, sometimes long stoloniferous, often glabrous, sometimes scabrous. Roots fleshy. Stem erect, simple or branched in distal part, with 1 to several sheaths proximally. Leaves concentrated in distal part of stem, alternate, often shortly petiolate, sometimes sessile, linear to suborbicular, 3--7-veined. Inflorescences terminal or pseudolateral (terminal on a short, lateral branchlet opposite a leaf), umbellate or with flowers paired or solitary; bract absent. Flowers bisexual, often nodding, sometimes horizontal, tubular-campanulate to opening flat. Tepals 6, free, white, greenish, yellow, pink, dark red, or dark purple, often saccate or spurred at base. Stamens 6, inserted at base of tepals; filaments usually slightly flat; anthers basifixed to innate, extrorse. Ovary 3-loculed; ovules 2--6 per locule. Style filiform, 3-lobed to 3-fid apically with ± recurved lobes. Fruit a berry, dark blue to black, 2(--6)-seeded. Seeds globose or ovoid.
Twenty species: Bhutan, China, India, Japan, Korea, Laos, Malaysia, Myanmar, Nepal, Russia, Sikkim, Thailand, Vietnam; 14 species (eight endemic) in China.
The North American genus Prosartes D. Don has often been included in Disporum but recent micromorphological, karyological, phytochemical, and molecular phylogenetic studies indicate that separation of the two genera is appropriate.
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| 1 |
Inflorescences all or at least partly pseudolateral (terminal on a short, lateral branchlet opposite a leaf). |
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(2) |
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Inflorescences all truly terminal (at apex of a stem or branches). |
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(5) |
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| 2 (1) |
Tepals long spurred, spurs cylindric, often slightly recurved, 4--5(--8) mm |
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11 Disporum calcaratum |
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Tepals shortly spurred, spurs gibbous, 1--3 mm. |
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(3) |
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| 3 (2) |
Flowers semiopen campanulate, 2.5--3.8 cm, narrowed to base; stamens 2--2.8 cm; tepal spurs ca. 1 mm |
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5 Disporum megalanthum |
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Flowers tubular-campanulate to campanulate, 1.5--2.5(--2.8) cm; stamens 0.8--2 cm; tepal spurs 2--3 mm. |
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(4) |
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| 4 (3) |
Pedicel usually papillose-scabrous; tepals not densely papillose apically |
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7 Disporum cantoniense |
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Pedicel subsmooth; tepals densely papillose apically |
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8 Disporum kawakamii |
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| 5 (1) |
Tepals minutely puberulent on both surfaces |
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6 Disporum acuminatissimum |
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Tepals glabrous or sometimes minutely papillose or pilose near base adaxially. |
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(6) |
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| 6 (5) |
Leaves rather thick, subleathery, with distinct cross veins |
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9 Disporum trabeculatum |
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Leaves thinner, papery or herbaceous, without distinct cross veins. |
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(7) |
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| 7 (6) |
Tepals slightly saccate at base, long attenuate at apex. |
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(8) |
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Tepals spurred at base, rounded to subacute at apex. |
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(9) |
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| 8 (7) |
Tepals greenish white, (1.2--)1.5--2 cm, nearly 3 × as long as stamens; filaments equaling or slightly longer than anthers; ovary globose, slightly shorter than or equaling style |
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1 Disporum viridescens |
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Tepals white, 1.1--1.3(--1.6) cm, slightly longer than stamens; filaments ca. 2 × as long as anthers; ovary obovoid, ca. 1/2 as long as style |
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2 Disporum smilacinum |
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| 9 (7) |
Stamens and pistil longer than tepals. |
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(10) |
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Stamens and pistil shorter than or equaling tepals. |
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(11) |
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| 10 (9) |
Tepals 10--17 mm, subacute at apex |
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4 Disporum longistylum |
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Tepals 5--9 mm, rounded at apex |
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10 Disporum hainanense |
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| 11 (9) |
Flowers funnelform to broadly obconical, 1--1.2 cm |
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3 Disporum bodinieri |
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Flowers tubular-campanulate to open campanulate, 1.5--3 cm. |
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(12) |
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| 12 (11) |
Tepals white to cream, spotted with violet distally, apex yellowish green |
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13 Disporum nantouense |
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Tepals yellow, apex rarely green. |
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(13) |
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| 13 (12) |
Flowers cylindric-campanulate, 2--3 cm; filaments minutely papillose proximally |
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12 Disporum uniflorum |
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Flowers open campanulate, 1.5--2.3 cm; filaments glabrous or sparsely papillose |
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14 Disporum shimadae |
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List of lower taxa
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Treatments in Other Floras @ www.efloras.org
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