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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 tuerckheimii Donnell Smith
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PlaceOfPublication
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Bot. Gaz. 56: 54. 1913.
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Note
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TYPE: Guate- mala, Tuerckheim 1536, not seen. Paratype: Costa Rica, Pittier 10539 (US).
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Synonym
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Phaseolus chiriquinus Standley, Contr. U.S. Natl. Herb. 18: 109. 1916. TYPE: Panama, Pittier 3111 (US, holotype; isotype NY).
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Description
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Herbaceous vine, sometimes high climbing; stems stout, sericeous, becoming softly short tomentulose, drying angled, to 3 mm thick. Leaves pinnate trifolio- late; leaflets ovate, sometimes narrow, mostly 4-7 cm long, apically acute or acuminate, basally rounded, drying somewhat discolorous, softly densely pubes-
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Habit
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vine
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Description
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cent above and beneath, the veins elevated beneath, the minor venation some- times drying reticulate; petiolules ca. 3 mm long, tomentose; petioles mostly shorter than the terminal leaflets, densely puberulent; stipels conspicuous; 2-3 mm long. Inflorescences mostly elongate pseudoracemes to 30 cm long, the basal portion devoid of flowers, the peduncle basally stout, narrowing and becoming more densely pubescent upwards; bracts subfoliaceous, linear to broadly ovate, to 7 mm long, sericeous; bracteoles linear, glabrate, caducous, ca. 1 mm long; pedicels slender, ca. 10 mm long with scattered long hairs. Flowers white to bright violet or purplish; calyx sericeous overall, ca. 4 mm long, the tube ca. 3 mm long drying with umbonate or wing-like longitudinal enations, the limb flaring somewhat, the teeth deltoid, ca. 3 mm long, the uppermost longest, acute; stan- dard 1.5 cm long, the keel convolute, spiralled. Legumes oblong, compressed, slightly turgid around the seeds, ca. 4 cm long, densely tawny hirsute; seeds ca. 4.
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Note
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This species is distinguished by its dense overall pubescence and by its subfo- liaceous bracts and minute bracteoles. The fluting on the dried calyx is an inter- esting feature. Phaseolus tuerckheimii ranges from southern Mexico to Panama. In Panama it occurs only at upper elevations in Chiriqui Province where it is apparently shade tolerant and is found climbing on trees.
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Distribution
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ranges from southern Mexico to Panama.
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Specimen
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CHIRIQUL: Volcdn de Chiriqui, Boquete District, 7500 ft, Davidson 948 (MO). Rio Chiriqui Viejo N of Volcdn City, 5200-5600 ft, Duke 9064 (MO). Cuesta de Cerro Quemado, E slope of Chiriqui Volcano, 1800-2160 m, Pittier 3111 (NY). Cerro Punta, 6000 ft, Tyson 7099 (PMA).
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