398 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM. 



protect cacao plantations. The names " chalahuitl " (San Luis PotosI), 

 "chelele" (Tabasco), " hulandini " (MichoacSn), and " coyuacate " (Veracruz) 

 are reported for unidentified species of the genus. Belmar gives the Mixe 

 name as " tahli." 

 Rachis of the leaf not winged. 

 Flowers spicate. 



Spikes long, slender, interrupted ; flowers glabrous or nearly so. 



1. I. laurina. 

 Spikes very short, headlike, dense; flowers densely sericeous. 



2. I. leptoloba. 

 Flowers capitate. 



Flowers sessile; stipules deciduous 3. 1. jinicuil. 



Flowers pedicellate ; stipules persistent. 



Corolla 7.5 mm. long or shorter; fruit 9 to 12 cm. long 4. L paterno. 



Corolla 8 to 9 mm. long; fruit sometimes 40 cm. long 5. I. radians. 



Rachis of the leaves winged. 

 Corolla 10 to 16 mm. long. 



Leaflets glabrate on the upper surface ; corolla scarcely 10 mm. long. 



6. I. pringlei. 

 Leaflets copiously pubescent on the upper surface: corolla about 15 mm. 

 long. 



Calyx 4 to 6 mm. long 7. I. edulis. 



Calyx about 10 mm. long 8. I. xalapensis. 



Corolla 20 to 25 mm. long. 



Calyx very slender, the tube 2 to 3 mm. thick, thinly pubescent. 



9. I. purpusii. 

 Calyx broad, the tube 3.5 to 5 mm. thick, densely sericeous. 



Calyx lobes more than half as long as the tube ; leaflets 6 pairs. 



10. I. fissicalyx. 

 Calyx lobes less than half as long as the tube ; leaflets usually 5 pairs. 

 Calyx 10 to 12 mm. long, covered with loose fulvous hairs ; bracts 



ovate; leaflets obtuse or acutish 11. I. eriocarpa. 



Calyx about 15 mm. long, with a fine, close pubescence; bracts linear 

 or nearly so; leaflets acuminate— 12. I. spuria. 



1. Ing'a laurina (Swartz) Willd. Sp. PI. 4: 1018. 1806. 

 Mimosa laurina Swartz, Fl. Ind. Occ. 2: 978. 1800. 



Jalisco and Guerrero. Central America and the West Indies ; type from St. 

 Kitts. 



Tree, 7.5 to 15 meters high, with large broad crown ; leaflets 4 or 6, elliptic 

 or obovate, 6 to 14 cm. long, acute or acuminate, bright green, glabrous ; flowers 

 white, sweet-scented ; fruit flat, about 15 cm. long, 3 to 3.5 cm. wide. " Guamfi, " 

 (Porto Rico). 



2. Inga leptoloba Scblecht. Linnaea 12: 560. 1838. 



Veracruz, Tabasco, and Oaxaca ; type from Hacienda de la Laguna, Veracruz. 

 Central America. 



Tree, or often a shrub 2 to 3 meters high ; leaflets usually 6, 8 to 18 cm. long, 

 acute or acuminate, glabrous; spikes paniculate. " Vainillo " (Veracruz). 



Planted in Costa Rica as shade for coffee. 



3. Inga jinicuil Schlecht. Linnaea 12: 559. 1838. 

 Veracruz ; type from Jalapa. 



Large or small tree, often planted to shade coffee; leaflets 6, lanceolate to 

 elliptic, glabrous, 8 to 11 cm. long, acute, lustrous ; flowers white. " Jinicuil," 

 " cuajinicuil." 



