STANDLEY TKEES AND SHRUBS OF MEXICO. 479 



2. Diphysa macrocarpa Standi., sp. nov. 



Type from Tecozantla, Hidalgo, collected by F. Salazar, May 22, 1914 (U. S. 

 Nat. Herb. no. 1,039,091). 



Branches, petioles, and inflorescence densely viscid-pubescent; leaflets 11 to 

 29, oval, 8 to 15 mm. long, glabrous, pale beneath ; racemes lax, few-flowered ; 

 calyx glabrous, the lobes glandular-ciliate ; fruit 6 to 11 cm. long, 1.2 to 1.5 cm. 

 wide, obtuse or acute, short-rostrate, covered with sessile glands, the stipe about 

 twice as long as the calyx, viscid-setulose. " Retama de cerro." 



3. Diphysa thurberi (A. Gray) Rydb. 



Daubentonia thurberi A. Gray, Mem. Amer. Acad. n. ser. 5: 313. 1855. 

 Diphysa echinata Rose, Contr. U. S. Nat. Herb. 12: 271. 1909. 

 Sonora and Sinaloa ; type from Mabibi, Sonora. Southern Arizona. 

 Shrub ; leaflets about 11, or more, oval or rounded-oval, 1 to 1.5 cm. long. 



4. Diphysa minutifolia Rose, Contr. U. S. Nat. Herb. 12: 271. 1909. 

 Tamaulipas to YucatSn and Chiapas ; tj'pe from Cuernavaca, Morelos. 

 Shrub, 1 to 2 meters high, rigidly branched, the branches gray or red; 



leaflets about 13, oval or oblong, bright green ; flowers 1.5 cm. long. " Xsusuc " 

 (Yucatan, Maya); "retama" (Tamaulipas). 



5. Diphysa sennoides Benth. Nat. For. Kjobenhavn Vid. Medd. 1853: 12. 1854. 

 Veracruz (type locality) and Hidalgo to Guerrero and Oaxaca. Reported 



from Guatemala and Venezuela. 



Shrub 2 to 4 meters high ; leaflets about 13 ; fruit very large, about 10 cm. 

 long. " Cascabelillo " (Guerrero). 



6. Diphysa robinioides Benth. Nat. For. Kjobenhavn Vid. Medd. 1853: 11. 



1854. 



Diphysa floribunda Peyr. Linnaea 30: 78. 1859. 



Veracruz to YucatS,n, Chiapas, and Oaxaca. Central America; type from 

 Nicaragua. 



Shrub or small tree, sometimes 7.5 meters high; leaflets mostly 11 to 21, 

 oval or oblong; flowers numerous, 1.5 em. long; fruit about 6 cm. long and 

 1.5 to 2 cm. wide. " Cuachepil " (from the Nahuatl cuau-chepilli) ; " palo ama- 

 rillo " (Guatemala) ; " guachipilm," " guachipelf," " huachipilln " (El Salvador, 

 Costa Rica). 



The wood is hard and durable ; it yields a yellow dye. It is doubtful whether 

 this species is distinct from D. carthaginensis Jacq., which was described from 

 Cartagena, Colombia. 



7. Diphysa suberosa S. Wats. Proc. Amer. Acad. 22: 405. 1887. 

 Sonora to Morelos and Oaxaca ; type from Guadalajara. 



Shrub ] to 3 meters high ; bark of the older branches forming thick, corky 

 ridges; leaflets numerous. 5 to 15 mm. long. "Palo santo " (Jalisco). 



The powdered bark is used in Jalisco as a remedy for catarrh. The flowers 

 of this and the next species are smaller than in D. robinioides. 



8. Diphysa occidentalis Rose, Contr. U. S. Nat. Herb. 12: 271. 1909. 

 Sonora to Guerrero ; type from Guaymas, Sonora. 



Shrub or tree, 1.5 to 8 meters high, the trunk sometimes 30 cm. in diameter. 



DOUBTFUL SPECIES. 



COLUTEA AMEBiCANA Mill. Gard. Diet. ed. 8. Cohitea no. 5. 1768. Type from 

 Veracruz. 



23. LENNEA Klotzsch ; Link, Klotzsch & Otto, Icon. PI. Rar. 2: 65. 1842. 

 Unarmed shrubs or small trees ; leaves pinnate, the leaflets large ; flowers 

 rather small, racemose ; fruit flat, bivalvate, few-seeded. 



