STANDLEY TREES AND SHRUBS OF MEXICO. 403 



Fruit and ovary glabrous or nearly so. 



46. C. emarginata. 



Fruit and ovary pubescent 47. C. andrieuxii. 



Leaflets 6 to 15 pairs. 

 Leaflets glabrous; stipules large, reniform. 



48. C. nicaraguensis. 

 Leaflets pubescent ; stipules lanceolate to linear. 



Fruit glabrous ; leaflets usually acute 49. C. racemosa. 



Fruit pubescent, at least wbeu young ; leaflets very obtuse 

 or rounded at the apex. 

 Leaflets 1.8 to 3 cm. long; bracts lanceolate. 



50. C. liebmanni. 

 Leaflets mostly 5 to 12 cm. long ; bracts rounded-oval. 



51. C. reticulata. 



1. Cassia pauciflora H. B. K. Nov. Gen. & Sp. 6: 360. 1823. 

 Cassia punctulata Hook. & Am. Bot. Beechey Voy. 420. 1841. 



Sinaloa to Guerrero ; type from La Venta del Peregrino. Central America ; 

 Brazil. 



Shrub 0.6 to 2.5 meters high, viscid-hirsute ; leaflets 2 pairs, 1.5 to 4.5 cm. 

 long, obtuse or rounded at apex ; petals yellow, nearly 2 cm. long ; fruit about 

 3 cm. long, nearly 1 cm: wide. " Bejuco " (Sinaloa). 



2. Cassia hispidula Vahl. Eclog. Amer. 3: 10. 1807. 



Durango to Veracruz and Chiapas. Central America and South America. 



Plants procumbent, usually herbaceous, but sometimes fruticose, very viscid ; 

 leaflets 2 pairs, 1 to 2 cm. long; petals bright yellow, 1.5 to 2 cm. long; fruit 

 flat, hirsute, 3 to 4.5 cm. long, 8 mm. wide. " Nahuapate " (Costa Rica). 



The plant is used medicinally in Costa Rica. The seeds are reported to con- 

 tain abrin, the principle found in the seeds of Abrus precatorius. 



3. Cassia enneandra T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 179. 1915. 

 Oaxaca and Chiapas ; type from Cerro de Picacho, Oaxaca. Guatemala. 

 Slender shrub, 1 to 2 meters high ; leaflets 2 pairs, 1 to 1.8 cm. long, thinly 



pilose ; flowers about 1.8 cm. long. 



4. Cassia diphylla L. Sp. PI. 376. 1753. 



Veracruz to Guerrero and Oaxaca. Widely distributed in tropical America. 

 Plants essentially annual and usually herbaceous, but often frutescent, pros- 

 trate, glabrous; leaflets and large stipules finely parallel- veined. 



5. Cassia greggii A. Gray, PI. Wright. 1 : 59. 1852. 



Chamaecrista greggii Pollard ; Heller, Cat. N. Amer. PI. ed. 2. 5. 1900. 



Nuevo Leon (type locality) and Tamaulipas. 



Low shrub, nearly glabrous, with gray or brownish branches ; leaflets oblong, 

 about 1 cm. long; flowers 1.5 cm. long; fruit flat, 4 cm. long, 6 mm. wide, pu- 

 berulent. 



6. Cassia macdoug-aliana Rose, Contr. U. S. Nat. Herb. 12: 267. 1909. 

 San Luis Potosl to Puebla ; type from Tehuacan, Puebla. 



Densely branched shrub, 30 to 60 cm. high; leaflets 4 to 8 mm. long, bright 

 green, thick; flowers large, deep yellow, long-pedicellate. 



7. Cassia cinerea Cham. & Schlecht. Linnaea 5: 559. 1830. 

 Chamaecrista cinerea Pollard ; Heller, Cat. N. Amer. PI. ed. 2. 5. 1900. 

 Tamaulipas, Veracruz, and Oaxaca, often on seashores ; type collected between 



Tecolutla and Villa Rica, Veracruz. 



Ascending or prostrate shrub, the stem sometimes 2 meters long; leaflets 

 small, pubescent. 



