368 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Leucaena lanceolata S. Wats. Proc. Amer. Acad. 21: 427. 1886. 



Sonora, Chihuahua, and Sinaloa ; type from Hacienda San Miguel, Chihuahua. 

 Shrub, 1.5 to 3 meters higli ; leaflets 2 to 4 cm. long, acute ; flower heads 1.5 to 

 2 cm. in diameter; fruit 12 to 18 cm. long. 



5. Leucaena microcarpa Rose, Contr. U. S. Nat. Herb. 5: 141. 1897. 



Baja California and Sinaloa to Moielos and Guerrero ; type from Miraflores, 

 Baja California. 



Shrub or tree, sometimes 6 meters high ; leaflets 2 to 5.5 cm. long, rounded to 

 acute at apex, thick, lustrous; flowers white, the heads 2 cm. in diameter. 

 "Guajillo" (Michoacdn, Guerrero). 



It is possible that the isouthern plant, ^vlth larger leaflets, represents another 

 species. All the material is very close to L. tricliodes (Jacq.) Benth., of His- 

 paniola. 



6. Leucaena esculenta (Moc. & Sesse) Benth. Trans. Linn. Soc. 30: 442. 1875, 

 Acacia esculenta Moc. & Sessg; DC. Prodr. 2: 470. 1825. 



Mimosa esculenta Moc. & Sess§, PL Nov. Hisp. 178. 1887. 



Jalisco to Puebla and Chiapas ; type from " Nova-Hispania." 



Tree, 6 to 15 meters high ; leaves often 40 cm. long, the leaflets linear, 3 to 

 4 mm. long, glabrate ; flowers white, odorless, the heads 2 cm, in diameter, 

 arranged in large racemes or panicles ; fruit 12 to 27 cm. long, 2 to 3 cm. 

 wide, red or purplish. " Guaje " or " huaje " (Jalisco, Mexico, Morelos, Oa- 

 xaca ; derived from the Nahuatl huaxin, hoatzin, or hoaxin) ; '" uachi bianco " 

 (Chiapas); " huassi," " guaxi " (OtomI, Peilafiel). 



Sess6 and Mocino state that the pods were an article of commerce and that 

 the seeds, in spite of their unpleasant flavor, were eaten by the Indians, who 

 believed that they possessed aprodisiac properties. The seeds are still eaten 

 in Mexico, usually with salt. 



This is probably the plant of which Sahagfm writes : " There is a tree known 

 as uaxin. It is of medium size ; its trunk is smooth, likewise the leaves, which 

 are almost like those of the ^rbol del Pert! [ScMnus molle]. It bears a fruit 

 like that of the carob, which is good to eat and is offered for sale in the 

 markets." 



According to Robelo, the geographic name Oaxaca takes its derivation from 

 the word huaxin, the Nahuatl form being Huaxyacac, or " place where the 

 huaxin begins to grow." The word Huaxtl signifies " where the huaxin 

 abounds," and Huajuapan " river of the huaxin." 



7. Leucaena diversifolia (Schlecht.) Benth. in Hook. Journ. Bot. 4: 417. 1842. 

 Acacia diversifolia Schlecht. Linnaea 12: 570. 1838. 



Jalisco to Oaxaca and Veracruz ; type from Jalapa, Veracruz. 

 Shrub ; leaves large, glabrate ; flower heads 2 cm. in diameter ; fruit 15 to 

 20 cm. long, about 1.5 cm. wide, lustrous. 



8. Leucaena cuspidata Standi. Contr. U. S. Nat. Herb. 20: 189. 1919. 

 Known only from the type locality, Minas de San Rafael, San Luis Potosl. 

 Leaflets pale beneath ; flower heads less than 1 cm. in diameter. 



9. Leucaena shannoni Donn. Snnth, Bot. Gaz. 57: 419. 1914. 

 Chiapas. El Salvador (type locality). 



Shrub or tree ; leaflets oblong, 2.5 to 4 mm. wide, obtuse ; flowers glabrous ; 

 fruit puberulent. 



10. Leucaena glabrata Rose, Contr. U. S. Nat. Herb. 5: 140. 1897. 

 Guerrero and Puebla to Chiapas ; type from Acapulco, Guerrero. 



Tree, 9 to 12 meters high, with a trunk 30 cm. or more in diameter ; leaflets 

 glabrous or nearly so. "Guaje" (Guerrero). 



