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Plants of Taiwan

  • Calanthe davidii Franch.
    長葉根節蘭    

    形態特徵

    TYPE! <em>Calanthe davidii</em> Franch.

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    相關連結

    作者

    SU, Horng-Jye

    形態特徵

    • Plants 30-50 cm tall. Rhizomes not distinct. Pseudobulbs clavate, 2-4 cm long, ca. 1 cm thick, with 2-4 nodes.
    • Leaves 6-10, nearly distichous, overlapping pseudobulbs at their bases, linear, 20-60 cm long, 1-4 cm wide, membranaceous, mainly 3-nerved, without distinct petiole.
    • Scapes erect, slender, 40- 80 cm tall, terete; peduncle short pubescent; rachis ca. 30 cm long; bracts linear-lanceolae, 7-15 mm long, 3-4 mm wide; ovary and pedicel 8-15 mm long, shortly pubescent. Flowers numerous, crowded, pale green or whitish, not resupinate, with reflexed sepals and petals; sepals obovate or oblong, 7-9 mm long, 3-5 mm wide, acute or obtuse at apex; lateral sepals similar but often slightly wider; petals linearspatulate, 7-9 mm long, 2-3 mm wide, acute at apex, cuneate at base; lip white, spurred, broadly obtriangular, 5-9 mm long, 11-15 mm wide, 3-lobed, lateral lobes falcate-oblong, obtuse at apex, entire or irregularly undulate, central lobe obtriangular, deeply 2-lobed, disc with a large white 3-lobed callus and many small yellowish calli near base; spur 7-14 mm long, glabrous or sparsely pubescent; column ca. 3- 5 mm long, connate with base of lip; anther cordate; pollinia unequal, in 2 groups, 2 long and 2 short, connected through short caudicles to oblong viscidium; stigma 2-parted; rostellum, bifid.
    • The shape and the size of the lobes of the lip in this species is highly variable. The lobules of the central lobe are sometimes greatly reduced. Such variation can be found within a population.

    分布

    World: India, the Himalaya, southern China, and Japan.
    Taiwan: In forests at 1,200-2,000 m throughout the island.

    引證標本

    TAIPEI: North Chiatienshan, Su & Chen 7173*; Tatungshan, Su 9029. TAOYUEN: Lalashan, Matuda s. n. Jul 1919. ILAN: Nanhutashan, Su 8323; Su & Chen 9081. NANTOU: Chitou, Su 679; Shenmu to Tataka, Su & Chen 9088. HUALIEN: Chungyungchienshan, Su 735; Lakulakuchi, Su & Hsu 8275. PINGTUNG: North Tawushan, Su & Chen 9363.

    資料來源

    SU, Horng-Jye. 2000. 38. ORCHIDACEAE. Flora of Taiwan, second edition (台灣植物誌第二版). 5: 784.

    本種於 1990 年由 Su 在台灣記錄到後,目前已有 4 種學名、 1 種中文名及 1 種其他語言俗名曾在台灣被使用。

    本種共有 5 份 典藏標本

    <em>Calanthe davidii</em> Franch.長葉根節蘭