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(Last Modified On 9/30/2013)
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(Last Modified On 9/30/2013)
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Species
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Phaseolus coccineus L.
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PlaceOfPublication
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Sp. P1. 724. 1753.
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Note
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TYPE: Herb. Linnaeus (LINN 899.2, not seen; microfiche MO).
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Synonym
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Phaseolus formosus H.B.K., Nov. Gen. Sp. P1. 6: 449. 1823. TYPE: near Toluca, Mexico, not seen. Phaseolus obvallatus Schlecht. Linnaea 12: 328. 1838. TYPE: Mexico, Ehrenberg not seen. Phaseolus coccineus ssp. obvallatus (Schlecht.) Marechal et al., Taxon 27: 199. 1978. Phaseolus multiflorus Lam., Encycl. Meth. Bot. 3: 70. 1789. Renaming of P. coccineus L. Phaseolus polyanthus Greenm., Publ. Field Columbian Mus., Bot. Ser. 2: 253. 1907. TYPE: Mexico, Barnes et al. 20 (F, not seen). Phaseolus coccineus ssp. polyanthus (Greenm.) Marechal et al., Taxon 27: 199. 1978.
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Description
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Herbaceous vine, often large, stems softly hirsute, somewhat glabrescent, becoming stout, ca. 2-3 mm thick. Leaves pinnate trifoliolate, leaflets broadly ovate, the lateral pair strongly oblique, mostly 6-10 cm long, 6-8 cm wide, api- cally acute or acuminate, basally truncate, subcordate or rounded, the venation conspicuous on drying, sparingly soft pubescent with long and short hairs; pet- iolules thick, 3-5 mm long, petioles mostly longer than the terminal leaflet, stipels conspicuous, 4-6 mm long, cucullate, striate and pubescent outside, pubescent basally within. Inflorescences elongate cymose pseudoracemes to 30 cm long, sparingly flowered proximally, somewhat congested apically, the rachis drying sharply angled and tomentulose, especially upwards, bracts subfoliaceous, con- spicuous, to 1 cm long, linear to broadly ovate, often acute, sometimes acuminate; bracteoles 2, ovate, subtending and slightly exceeding the calyx; pedicels mostly straight, 15-18 mm long, much longer than the calyx, becoming somewhat woody in fruit. Flowers red to lavender, showy; calyx cupular, 10-13 mm long, glabrate except the lower tooth, the upper teeth united forming a hood, the lower teeth acute, the lowermost longest; standard, ca. 2 cm long. Legume oblong, somewhat falcate, ca. 10 cm long, 15 mm wide, compressed or slightly turgid, beaked, softly short pubescent; seeds 5-8.
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Habit
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vine
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Note
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This species is distinguished by its elongate pedicels, its paired ovate brac- teoles, by its large, conspicuous stipels and by the ciliate to tomentose lowest calyx tooth. This species is usually recorded as having scarlet flowers, but in Panama collectors more often note lavender or magenta flowers. In Guatemala this species is much cultivated for food, and in the United States it is cultivated for its showy flowers as 'Scarlet Runner Bean.'
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Common
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Scarlet Runner Bean
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Specimen
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CHIRIQUI: Central valley of Rio Chiriqui Viejo, 1800-2000 m, Allen 1397 (MO). Nueva Suissa, Croat 13508 (F, MO, NY, PMA). Bajo Mono, Boquete District, 4500 ft, Davidson 496 (MO). Rio Chiriqui Viejo N of Volcdn City, 5200-5600 ft. Duke 9019 (MO, NY). Nueva Suissa near Audubon Society Cabin, Gentry 5986 (MO). Cerro Punta, 6000 ft, Tyson 7097 (PMA). 2 km W of La Garita, 3 km WNW of Cerro Punta, 2000 m, Wilbur et al. 15292 (DUKE). Finca LUrida to Pefia Blanca, 1750-2000 m, Woodson & Schery 313 (MO). Casita Alta, Volcdn de Chiriqui, 1500-2000 m, Woodson et al. 918 (MO, NY, US).
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