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(Last Modified On 10/7/2013)
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(Last Modified On 10/7/2013)
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Species
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Jubelina wilburi W. R. Anderson
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PlaceOfPublication
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Brittonia 28: 410. 1976.
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Note
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TYPE: Panama, Luteyn & Wilbur 4574 (DUKE, holotype)
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Description
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Lianas, all parts drying dark; stems sericeous or becoming glabrate, the tri- chomes golden brown, T-shaped, sessile, ca. 0.2 mm long, straight and appressed. Leaves opposite, sericeous, eglandular, elliptic ovate or rounded, acuminate at the apex, obtuse or rounded at the base, 11.0-17.5 cm long, 6.5-11.5 cm wide, sometimes with a few large sunken glands in the lower ?3 of the blade, sparsely and inconspicuously appressed-pubescent, soon glabrate, the midrib densely pu- bescent above, prominently sunken, primary lateral veins 5 or 6 on each side, arcuate-ascending; petioles 1.0-1.7 cm long; stipules triangular, 0.5 mm long. Inflorescences terminal and upper axillary, cymose-paniculate, the branches usually to 7 per node, densely rufous tomentose, the trichomes appressed to patulous, the distal nodes with leaflike bracts 6-17 mm long, these sericeous, prominently 2-4-glandular; flowers in 4-flowered umbels or 6-flowered corymbs; floral bracts 2-4(-6) mm long, ovate or elliptic, eglandular; peduncles 1.0-3.5 mm long; pedicels 2-4 mm long. Flowers with sepals 5, 2.5-3.0 mm long, narrowly ovate, obtuse and revolute at the apex, tomentose outside, glabrous within, the anterior sepal eglandular, the 4 lateral sepals each with 1 large gland, these 1.5 mm long; petals 5, clawed, greenish-yellow, sericeous, glabrous towards the mar- gin, the 4 lateral petals with the limb 3.0-4.5 mm long, 2.5-4.0 mm wide, rounded to broadly obovate, concave, rounded to weakly hastate at the base, the margin erose and usually eglandular, posterior petal erect, the limb 2.5-2.8 mm long, 1.5-2.5 mm wide, elliptic or obovate, the margin glandular; stamens 10, the fil- aments glabrous, connate at the base, to ca. 1 mm high, 1.8-2.5 mm long, slightly unequal, the anthers subequal, to 1 mm long, glabrous; ovary globular, 1.5 mm high, tomentose, each of the 3 carpels several-sulcate, the styles 3, 2 mm long, equalling or slightly exceeding the anthers, glabrous or pubescent, subequal, the anterior style inclined toward the posterior petal, the 2 posterior styles arcuate- ascending. Fruits of 3 samaras or 1 or 2 by abortion, 2.0-2.5 cm long, 5-6 cm wide, sparsely appressed-pubescent throughout; samaras with the lateral wings broadly ovate, confluent at the base, 2.5-4.0 cm long, 2.5-3.5 cm wide, rounded at the apex, the veins conspicuous, the dorsal wing 2.0-2.7 cm wide, 1.0-1.3 cm high, semicircular; seed pyriform, ca. 1 cm long.
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Habit
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Lianas
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Distribution
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found in Panama and Costa Rica
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Note
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Occurring in premontane wet and tropical wet forests at elevations of 400-1,000 meters. The species is closest to Jubelina uleana (Niedenzu) Cuatr. from Peru, with which it shares yellow flower color, other species being pinkish with almost glabrous leaves. Jubelina wilburi differs from J. uleana in having smaller flower bracts, usually 2-4 mm long vs. 7-11 mm long, which are yellow- or brown- tomentellous rather than silver-velutinous as in J. uleana. In addition the sepals are glabrous within versus velutinous near the tip in J. uleana, and the fruits lack a well-developed intermediate wing between the dorsal and lateral wing. In J. uleana the intermediate wing is subequal to the central dorsal wing.
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Specimen
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COLON: E Ridge, Santa Rita, Duke 15300 (MO). Santa Rita Ridge, Dwyer 9544 (MICH, MO, PMA, RSA). Santa Rita Ridge, ca. 4-5.5 mi E of Transisthmian Highway, Lewis et al. 1281, 5281 (both MICH, MO, PMA, US). VERAGUAS: Road beyond Escuela Agricola, Alto Piedra above Santa Fe, 800-1000 m, Luteyn & Wilbur 4574 (DUKE).
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