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(Last Modified On 10/29/2012)
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(Last Modified On 10/29/2012)
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Species
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COSTUS LAEVIS R. & P.
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PlaceOfPublication
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Fl. Peruv. 1:3. 1798
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Reference
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Woodson in Ann. Missouri Bot. Gard. 29:330. 1942.
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Synonym
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Costus laxus Peters. in Mart. Fl. Bras. 33:56. 1890. Costus giganteus 0. Ktze. Rev. Gen. 2:687. 1891, non Ridl. Costus splendens Donn. Sm. & Tuerckh. in Bot. Gaz. 33:260. 1902. Costus maximus K. Sch. in Engl. Pflanzenreich IV. 46:405. 1904. Costus Weberbaueri Loesn. in Notizblatt. K. Bot. Gart. 10:712. 1929. Costus Malortieanus Wendl. var. amazonicus Loesn. loc. cit. 710. 1929. Costus amazonicus (Loesn.) Macbr. in Field Mus. Publ. Bot. 11:13. 1931. Costus Skutchii Morton in Jour. Wash. Acad. Sci. 27:306. 1937.
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Description
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Plants usually quite stout, 1-4 m. tall, essentially glabrous throughout, or the bracts and leaves indefinitely papillate; stems straight or somewhat spiral; leaves narrowly elliptic to oblanceolate, acuminate,, broadly cuneate and obscurely sub- auriculate at the base, shortly subpetiolate, 15-40 cm. long, 4-12 cm. broad; inflorescence broadly ovoid to oblong-fusiform, sessile and set closely amongst the upper reduced leaves, 5-25 cm. long; bracts without appendages or only the lowermost somewhat leaf-like, broadly ovate, obtuse, 2.5-3.5 cm. broad, deep yellowish green flushed with crimson within at anthesis, usually with a con- spicuous yellow linear callus; calyx 1 cm. long, broadly 3-dentate; ovary 0.4 cm. long; corolla 4.0-6.5 cm. long, yellowish white, the lobes obovate-oblong; labellum 7-8 cm. long, broadly 3-lobed and sharply reflexed, reddish orange with pale yellow reticulations.
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Distribution
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Guatemala to Peru and northern Brazil, chiefly in lowland thickets and open forest.
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Specimen
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BOCAS DEL TORO: Rio Cricamola, Woodson, Allen d Seibert 1929; Water Valley, von Wedel I507; Little Bocas, von Wedel 25o6; Fish Creek, von Wedel 22i9a. CANAL ZONE: Ft. Randolph, Standley 28672; Chagres, Fendler 447; Quebrada Ancha, Steyermark d Allen I712. COCLE: El Valle de Anton, Allen 2I99.
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Note
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A magnificent species outstanding in the genus because of the showy flowers with reticulated labellum.
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