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(Last Modified On 11/8/2012)
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(Last Modified On 11/8/2012)
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Species
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SPIRANTHES WOODSONII L. Wms.
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PlaceOfPublication
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Ann. Missouri Bot. Gard. 29:337. 1942.
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Description
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Terrestrial palustrine herbs up to 5.5 dm. tall. Rhizomes slender, rooting at most of the nodes, with scarious sheaths arising from the nodes. Stems slknder, with well-developed leaves at the base which become bract-like above, glabrous below but becoming densely pubescent above. Leaves 3-10 cm. long, 1.3-2.8 cm. broad, oblong-elliptic to oval, acute or obtuse, largest near- the base of the stem and reduced to amplexicaul bracts above. Inflorescence up to 10 cm. long, flowers congested, becoming more open in fruit; bracts up to 4 cm. long and 1.6 cm. broad, lanceolate, acuminate, pubescent dorsally. Flowers large, similar to those of S. acaulis. Dorsal sepal 16.5-19 mm. long and 3.5-4 mm. broad, lanceolate, acuminate, 3-5-nerved, densely pubescent dorsally. Lateral sepals long-decurrent on the ovary, 35-40 mm. long from the apex to the base of the saccate mentum; free part 16.5-19 mm. long and 4-4.5 mm. broad, lanceolate, acuminate, arcuate, spreading, densely pubescent dorsally, 3-5-nerved. Petals 15-18 mm. long and 2-2.5 mm. broad, narrowly elliptic to narrowly oblanceolate, pubescent or ciliate near the margins of the basal half. Lip 28-32 mm. long and 6-7 mm. broad (apical lobe), linear-oblong and somewhat expanded and pandurate in the terminal third, caudate, with two extremely pubescent converging callus-ridges on the terminal third, the basal part densely pubescent and the remainder, except the glabrous apex, less pubescent, glabrous dorsally except at the base; terminal lobe oval or transversely rhombic; caudae about 5 mm. long, retrorse, fleshy but flattened.
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Distribution
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Panama.
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Specimen
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CHIRIQUI: vicinity of El Boquete, alt. 1000-1500 m., Cornman 2050; vicinity of Boquete, alt. 1200-1500 m., Woodson & Schery 753; in swampy meadows, Finca Lerida to Boquete, alt. about 1300-1700 m., Woodson, Allen & Seibert 1148.
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Note
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Very few species of Spiranthes have rhizomes.
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