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(Last Modified On 5/30/2013)
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(Last Modified On 5/30/2013)
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Species
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Sarcostemma bilobum Hook. & Arn.
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PlaceOfPublication
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Bot. Beechey's Voy. 438. 1841.
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Note
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TYPE: Beech. herb. (K, not seen).
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Synonym
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Sarcostemma adenianum Dcne. in DC., Prod. 8: 541. 1844. TYPE: Linden (P, not seen). Philibertia lindeniana (Dcne.) Hemsley, Biol. Centr.-Amer. Bot. 2: 318. 1881. Philibertia biloba (Hook. & Arn.) Gray, Proc. Amer. Acad. Arts 21: 395. 1886. Funastrum lindenianum (Dcne.) Schltr., Fedde Repert. Sp. Nov. 13: 286. 1915. Funastrum bilobum (Hook. & Arn.) Macbr., Contr. Gray Herb. 49: 51. 1917. Sarcostemma bilobum subsp. lindenianum (Dcne.) Holm, Ann. Missouri Bot. Gard. 37: 519. 1950.
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Description
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Trailing or twining vines. Leaves oblong-ovate to suborbicular, shortly acuminate, deeply cordate, the sinus narrow and the lobes converging, pubes- cent or glabrate on both sides, 2-5 cm long and 1.5-4.0 cm wide; petioles 1.0- 2.5 cm long. Inflorescence umbellate, to 35-flowered; peduncles 1.5-6 cm long; pedicels slender, to 3 cm long. Flowers with the calyx lobed to the base, the lobes linear to ovate, ca. 2.5 mm long, puberulent outside, glabrous within; corolla whitish, subrotate, the tube ca. 2 mm long, the lobes lanceolate, obtuse, reflexed, ciliate, puberulent inside, glabrous outside, 5-7 mm long and 3-3.5 mm wide; corona 5-vesicular, each vesicle pyramidal, widest below the middle, ca. 3 mm high, free from the annular ring; gynostegium + cylindrical, shorter than the corona, ca. 2.5 mm high. Follicles to 8 cm long, 2 cm in diameter, puberulent, striate.
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Distribution
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This is a primarily lowland species which ranges from Mexico to Colombia and Venezuela.
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Note
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The Panamanian material is similar to what Holm referred to as subsp. lindenianum, but cannot be regarded as distinct from the typical sub- species. Holm cited Wedel 1755 as a putative hybrid between subsp. bilobum and subsp. lindenianum.
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Specimen
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BOCAS DEL TORO: Water Valley, Chiriqui Lagoon, Wedel 1755 (MO, US). DARIEN: Patifio, Duke 10530A (OS). PANAMA: Above Chepo, Mamoni River, Pittier 4729 (US). Vera Cruz, beach and sandy areas behind, Lewis et al. 2996 (F, MO). Isla Tabaguilla, Duke 5870 (MO).
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