156 JOURNAL OF the; WASHINGTON ACADEMY OF SCIENCES VOL. 11, NO. 7 



1. REVISION OF THE PANAMA SPECIES 



Legume broad, long, and flat; racemes many-flowered, elongate; leaves pin- 

 nate, 5-foliolate. (Platypoda.) 1. 5. panamensis. 

 Legume cylindrical, short; racemes 2- to 5-flowered; leaves mostly 1- or 

 3-foliolate, rarely 5-foliolate. (Strong ylopoda.) 

 Leaves unifoliolate. Petiole narrowly alate or scutellate at the apex; 

 petal about 4 cm. in diameter. 2. 5. simplex. 

 Leaves mostly 3-foliolate, sometimes 1- or 5-foliolate. 



Stamens 20 or fewer, not conspicuously unequal. Flowers small, the 

 petal hardly longer than the calyx. 3. 5. arborescens. 



Stamens numerous, conspicuously dimorphous, the longer ones 10 to 

 20, the smaller ones numerous. 

 Leaflets not over 10 cm. long, lanceolate, the petioles rather broadly 

 winged. 4. 5. trifolia. 



Leaflets usually larger, ovate, the petioles rather narrowly winged. 

 Petal suborbicular, about 2 cm. in diameter. 5. S. myrtifolia. 



Petal ovate-cordiform, about 2.5 cm. long and 3 cm. broad. 



6. 5. darienensis . 



1. Swartzia panamensis Benth. in Mart. Fl. Bras. 15-: 38. 1870. 



Deciduous (?) tree, 6 to 20 meters high, with short ascending limbs and 

 elongate crown, the trunk seldom over 40 cm. in diameter, often distorted, 

 the bark grayish, smooth. 



Leaves 5-foliolate, pubescent, glabrate, with lanceolate-acuminate silky- 

 pubescent caducous stipules; petioles 9 to 13 cm. long, almost terete; petio- 

 lules articulate, 4 to 6 mm. long; blades elliptic or ovate-lanceolate, rather 

 long and narrowly acuminate, S to 18 cm. long, 3 to 6 cm. broad, dark green 

 above, pale green beneath, the venation sparse, impressed above, prominent 

 beneath, the 9 to 11 primary veins alternate, arcuate, transversely anasto- 

 mosing. 



Racemes solitary in the defoliated axils of the preceding season or in the 

 axils of new leaves, very long (20 to 40 cm.), pendent, many-flowered, the 

 bracts awnlike, up to 10 mm. long, caducous; rachis and pedicels minutely 

 pubescent, the former thick and subangular; pedicels reflexed, clavate, 

 about 2 cm. long; calyx opening irregularly by 4 or 5 reflexed lobes about 

 1 cm. long. Petal creamy yellow, almost square (31 mm. long, 29 mm. broad), 

 unguiculate, hastate and emarginate at the base, subquadrilobate, with 

 irregular margin; claw narrow, about 6.5 mm. long. Stamens very numerous, 

 the larger ones 6 to 10, erect, with thick filaments 12.5 mm. long, the remain- 

 ing small ones with threadlike filaments 15 mm. long and smaller anthers, 

 their cells more or less parted at the base. Ovary short, flattened, entirely 

 smooth, long-stipitate, with a short, blunt, hardly bent style; stipe 6 mm. 

 long, the ovary and style about 5 mm. long; ovules S or fewer. 



Legume single, 20 to 30 cm. long, 8 to 10 cm. broad, coriaceous, apiculate, 

 dehiscent, 4- to 8-seeded; pedicel thick, 2 cm. long; stipe 1.5 to 2 cm. long; 

 seeds large, irregularly sublenticular-ovate, 7 to ^.o cm. long, 6 cm. wide, 

 and 1.5 cm. thick, exarillate, dark brown. 



vSpecimens Examined: 



Panama: Rocky slopes along Chagres River near Alhajuela, flowers and 

 fruit, May 13, 1911, Pittier 3520. Along Trinidad River, Canal Zone, near 

 sea level, flowers, July 20, 1911, Pittier 4019. Around Port Obaldia, San 

 Bias Coast, flowers, September 2, 1911, Pittier 4324. 



