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(Last Modified On 10/1/2013)
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(Last Modified On 10/1/2013)
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Species
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Tephrosia nitens Benth. ex Seem.
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PlaceOfPublication
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Bot. Voy. Herald 107. 1853.
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Note
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TYPE: Panama, Seemann 1036 (K, not seen; photo F, MO, NY; possible isotype at GH).
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Synonym
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Cracca nitens (Benth. ex Seem.) Kuntze, Rev. Gen. P1. 1: 175. 1891. Tephrosia nitens var. lanata Micheli in Dur. and Pitt., Bull. Bot. Soc. Belgique 30(1): 286. 1891. TYPE: Costa Rica, Pittier & Tonduz 3809 (holotype US; isotype B, not seen; photo F, MO). Tephrosia albida Brandegee, Univ. Calif. Publ. Bot. 10: 406. 1924. TYPE: Chiapas, Mexico, Purpus 9136 (US, not seen).
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Description
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Erect herb or sparsely branched shrub to 3 m tall; stems strigose to villous. Leaves usually 5-10 cm long, leaflets 5-13, ascending, 2-8 cm long, 0.5-2.0 cm wide, the terminal leaflet largest, oblong, retuse, the base cuneate, thick, glabrate above, silvery silky beneath; petiolules 2-3 mm long; petiole grooved, 3-5 mm long; rachis grooved, 1-5 cm long; stipules narrow to triangular, deciduous to apparently persistent, to 8 mm long. Inflorescences terminal and axillary, to 50 cm long, flowers 5-7 per node, apparently never all maturing fruit, nodes to 50 per inflorescence; bracts narrow, deciduous; pedicels to 8 mm long. Flowers drying 1.5-2.0 cm long; calyx 6-9 mm long, the lobes long acuminate, subequal, 4-7 mm long; petals white to rose purple, the standard oblong to circular, 15-20 mm long, 15 mm wide, silky on the back, often notched at the tip, the claw to 3 mm long, the wings oblong, to 2 cm long and 4 mm wide, the claw to 4 mm long, the keel to 15 mm long, the claw to 4 mm long; staminal tube 10-15 mm long, the vexillary stamen connate in part, free at the base; ovary silky, to 15 mm long and 1 mm wide, the margins thickened. Fruit linear, flattened, 5-6 cm long, 0.5 cm wide, evenly tapered to the persistent style base, not septate but the flat surface often indented between the seeds, pubescent; seeds 9-13, nearly circular, com- pressed, ca. 2.5 mm across, dark brown.
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Habit
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Erect herb or sparsely branched shrub found from southern Mexico to Brazil.
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Note
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This is a distinctive and attractive species both in flower and in leaf. All but one of the Panamanian collections seen are from Taboga Island, which is the type locality. Chromo- somes: 2n = 22 (Wood, 1949).
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Specimen
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PANAMA: Taboga Island, Allen 110 (GH, MO, NY), 1276 (GH, MO, US); Killip 3174 (US); Macbride 2830 (F, US); McDaniel & Cooke 12903 (FSU); Miller 2026 (US); Pittier 3571 (NY, US); Standley 27999 (US). Cerro Campana, ca. 2500 ft, Tyson 6439 (MO, SCZ).
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