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(Last Modified On 9/24/2013)
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(Last Modified On 9/24/2013)
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Species
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Aeschynomene americana L.
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PlaceOfPublication
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Sp. PI. 713. 1753.
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Note
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TYPE: Jamaica, Sloane (BM, not seen).
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Description
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Herbs to 2 m tall; stems erect to ascending, subglabrous to hispid. Leaves 2- 7 cm long, 20-60 foliolate; leaflets linear-oblong, 4-15 mm long, 1-2 mm wide, subfalcate, 2-several costate, apices and margins usually serrate-ciliate; stipules appendiculate below the point of attachment, striate, glabrous to hispid, attenuate at each end. Inflorescence few flowered, axes flexuous, hispidulous; bracts cor- date, acuminate, 2-4 mm long, 2-3 mm wide, glabrous, margins ciliate; bracteoles linear to linear-ovate, 2-4 mm long, 1.0-1.5 mm wide, acute to acuminate, gla- brous, margins serrate-ciliate. Flowers yellow, (5-)6-8(-10) mm long, calyx 3-6 mm long, glabrous to sparsely hispid; petals 5-10 mm long, clawed, the standard suborbiculate to broadly obcordate, 5-10 mm wide, apices ciliate, wings obliquely oblong, 5-8 mm long, 2 mm wide, ciliate at the apex, keel blades 4-5 mm long, 2.5-3.5 mm wide; stamens 6-8 mm long. Fruit (3-)6-8(-9) articulate, articles 2.5-5.0 mm wide, 3-6 mm long, glabrous to puberulent, sometimes with glandular trichomes, verrucose at maturity, the margins thickened; seeds 2-3 mm long, 1.5-2.0 mm wide, dark brown.
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Habit
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Herbs
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Note
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Aeschynomene americana is the most widespread and abundant member of the genus in Panama, occurring in nearly every province. It is distinguished from its closest relative, A. villosa, in possessing loments with generally more than 4 articulations, and with these possessing well-defined lateral sutures. Rudd (1955) recognized 2 varieties from Panamanian material based upon differences in fruit pubescence. Since no clear ecological or geographical pattern is apparent, this species is treated as being polymorphic for fruit pubescence with vegetative and floral characters remaining quite constant.
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Specimen
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BOCAS DEL TORO: Changuinola Valley, Dunlap 343 (US). Water Valley, Wedel 1531 (GH, MO, US), 1616 (GH, MO). Isla Col6n, Wedel 2973 (GH, MO, US). CANAL ZONE: BARRO COLORADO ISLAND: Croat 12817, 12835 (both MO), 13154 (DUKE, MO, NY, SCZ). Venado Beach, Correa & Gonzales 523 (DUKE, MO, PMA). Summit Garden, Croat 12&30 (MO, NY, SCZ). Rio Indio, Dodge & Allen 17378 (GH). Ft. Sherman site, Dwyer 8594 (MO). Pipeline Road, 5-6 mi N of Gamboa, Gentry 6676 (MO). Between Summit and Gamboa, Greenman & Greenman 5260 (MO). Las Cruces Trail, Hunter & Allen 737 (GH, MO). 0.5 mi N of Gamboa, Lazor & Tyson 5685 (MO). Near Rio Petitpie on road to Ft. Sherman, Mori & Kallunki 3669 (MO). 6 km E of Gamboa, Nee 9005 (MO). Panamerican Highway between Rodman Marine Base and Chorrera, Nowicke et al. 3597 (DUKE, MO). Chiva-Chiva Trail, Red Tank to Pueblo Nuevo, Piper 5190 (US). Rio Grande, near Culebra, Pittier 2112 (NY, US). Balboa, Standley 25518, 25540 (both US). Las Cascadas Plantation, near Summit, Standley 25768, 25776 (both US). Summit, Standley 26921 (US). Near Gatiin, Standley 27268 (US). Frijoles, Standley 27643 (US). Gamboa, Standley 28325 (US). Near Fort Randolph, Standley 28735 (US). Mount Hope Cemetery, Standley 28847 (US). Old Las Cruces Trail between Fort Clayton and Corozal, Standley 29059, 29182 (both US). Rio Pedro Miguel near East Paraiso, Standley 30046 (US). Dari&n Station, Standley 31560 (SU). Obispo, Standley 31780 (US). 6 mi N of Gamboa, Tyson 3500 (MO). Albrook Air Force Base, Tyson & Lazor 6012 (FSU). 1 mi N of Summit, Tyson et al. 2752 (MO, PMA). Cutover secondary forest, margin of the Pipeline road N to Gamboa, Wilbur & Teeri 11245 (DUKE, GH, MO). Playa Venado, Wilbur & Teeri 12959 (DUKE). Pipeline road, NW of Gamboa, Wilbur & Teeri 13378 (DUKE). CHIRIQUI: 2 mi W of Concepci6n, Baltimer (MO). Near Veladero, Burt & Koster 128 (MO). Rabo de Puerco, 8 mi W of Puerto Armuelles, Liesner 33 (MO). Quebrada Melliza, 6 mi S of Puerto Armuelles, Liesner 491 (MO). Boquete, Lewis et al. 391 (GH, MO, US). 2 mi S of Puerto Armuelles, Wilbur et al. 13579 (DUKE). COCLt: El Valle, Baltimer 1470 (MO). Old, Pittier 5092 (NY, US). Rio Grande, Troetsch 24 (DUKE, PMA). 10 mi E of Natd, Tyson 5237 (FSU, SCZ). Penonom&, Williams 359 (NY, US). COL6N: Calzada Larga, Gracia 48 (PMA). Quebrada Bonita, 3 km NW of Salamanca, 13 km E of Buenos Aires, Nee 9107 (MO). 1.2 mi NE of bridge over Rio Piedras on road from Portobelo to Pil6n, Nee & Mori 3669 (MO, PMA). Without definite locality, Rose 23997 (GH, NY, US). DARIEN: Santa F&, Duke 9481 (NY, US). HERRERA: Chitr6, Allen 1104 (GH, MO, US). Ocii, Allen 4087 (MO). 4 mi S of Los Pozos, Tyson 2679, 2695 (both FSU, MO). 10 mi S of Ocii, Tyson 2822 (MO, US). LOS SANTOS: Punta Mala, Tyson 2722 (SCZ). PANAMA: Isla Taboga, Allen 1283, 1295 (both GH, MO, US). 1 mi E of Tocumen, Blum & Tyson 1953 (FSU, MO, SCZ). Campo Experimental de Monte Oscuro, Correa 1914 (PMA). Be- tween Capira and Potrero, Dodge & Hunter 8604 (GH, MO). Rio Indio, Dodge & Allen 17378 (MO). Tocumen Airport, Dwyer 5603 (PMA). Chilibre, Dwyer 11978 (MO). Uriv&, Fernandez 131 (MO, PMA). Without other Locality, Hayes 455, 767 (both NY). El Palorin, Heriberto 255 (NY, US). San Jose Island, Johnston 832, 1201 (both GH, US). Icaco Island, Johnston 937 (GH, MO, US). Alhajuela, Killip 3226 (US). SE slope of Cerro Campana, Lewis et al. 3153 (MO). Cerro Campana, McDaniel 8121 (DUKE, FSU, MO). Cerro Penon, 3 km S of Alcalde Diaz, Nee 8894 (MO). Matias Hernindez, Pittier 6871 (NY, US). Between Rio Pacora and Chepo, Porter et al. 5144 (MO). Old Panama, Porterfield 1933 (NY). Vista del Mar, Porterfield (NY). Arraijan, Porterfield (NY). Las Cumbres, Puga 42 (MO). 1 mi W of Bejuco, Tyson & Blum 2543 (FSU, MO, SCZ). Bella Vista, Standley 25405 (US). E of Rio Tocumen, Standley 26579, 29477 (both US). Corozal Road near Panama, Standley 26787, 26865 (both US). Toboga Island, Standley 27110 (US). Rio Tapia, Standley 28066 (US). 2 km entrada camino Cerro Azul, Taylor 5, 78 (both PMA). VERAGUAS: 2 km NW of Atalaya, Nee 8251 (MO). 1 mi W of Santiago, Tyson 5171 (FSU, SCZ). Puerto Mutis 12 mi S of Santiago, Tyson 6001 (DUKE, FSU, MO).
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