812 CONTRIBUTIOlSrS FROM THE NATIONAL HERBARIUM. 



6. Ayenia glabra S. Wats. Proc. Amer. Acad. 22: 399. 1887. 

 Aycma truneata Rose, Contr. U. S. Nat. Herb. 1 : 94. 1891. 

 Sonora and Sinaloa to Guerrero ; type from Tequila, Jalisco. 



Slender shrub, 1 to 4.5 meters high; leaves long-petiolate, lance-ovate to 

 broadly ovate, 3.5 to 9 cm. long, acute to long-acuminate, subcordate at base, 

 dentate ; sepals green or purple-brown ; capsule 8 mm. long, short-muricate. 



7. Ayenia f ruticosa Rose, Contr. U. S. Nat. Herb. 5 : 95. 1899. 

 Puebla ; type from Tehuac^n ; probably also in Oaxaca. 



Slender shrub ; leaves short-petiolate, dentate, green above, densely and 

 very finely whitish-tomentulose beneath ; fruit 8 mm. in diameter, pubescent, 

 muricate. 



8. Ayenia microphylla A. Gray, PI. Wright. 1: 24. 1852. 



Chihuahua and Coahuila. Western Texas and southern Arizona ; type from 

 El Paso. 



Small, densely branched shrub, usually 30 cm. high or less ; leaves short- 

 petiolate, dentate, closely stellate-pubescent on both surfaces; capsule sparsely 

 tuberculate. 



9. Ayenia paniculata Rose, Contr. U. S. Nat. Herb. 1 : 94. 1891. 

 Known only from the type locality, Alamos, Sonora. 



Shrub, about 60 cm. high ; leaves long-petioled, rounded-ovate, 6 to 7 cm. long, 

 acute or acuminate, rounded or subcordate at base, dentate, sometimes obscurely 

 trilobate, green above, whitisli beneath; flowers in a nearly naked, tliyrsiform 

 panicle ; capsule 8 to 10 mm. in diameter, minutely stellate-tomentulose, tuber- 

 culate. 



10. Ayenia magna L. Syst. Nat. ed. 10. 1247 1759. 



Ayenia purpusii T. S. Brandeg. Univ. Calif. Publ. Bot. 7 : 328. 1920. 



Veracruz and Yucatan. Jamaica and northern South Anioi-ica ; type from 

 Caracas, Venezuela. 



Shrub, 0.5 to 2 meters high ; leaves cordate, acute or acuminate, dentate, 

 often pale beneath; capsule 6 to 9 mm. in diameter, strongly muricate. 



11. Ayenia berlandieri S. Wats. Proc, Amer. Acad. 21: 419. 1886. 

 Tamaulipas to Jalisco, Guerrero, and Morelos ; type from Santander, Tamau- 



lipas. 



Plants suffrutescent, 1 to 2 meters high ; leaves short-petiolate, ovate, acumi- 

 nate, rounded or subcordate at base, deuticulate, 3 to 7-nerved at base; sepals 

 purple-brown, long-acuminate ; capsule about 8 mm. in diameter, muricate. 



12. Ayenia palmeri S. Wats. Proc. Amer. Acad. 21: 419. 1886. 



Known only from the type locality, Hacienda San Miguel, southwestern 

 Chihuahua. 



Shrub, about 1.5 meters high; leaves broadly ovate, short-petiolate, 4 to 6 

 cm. long, acute or acuminate, serrate; fruit 7 mm. in diameter, stellate-tomen- 

 tulose, muricate. 



13. Ayenia jaliscana S. Wats. Proc. Amer. Acad. 26: 133. 1891. 

 Ayenia nelsoni Rose, Contr. U. S. Nat. Herb. 8: 321. 1905. 

 Chihuahua to Jalisco and Chiapas ; type from southwestern Chihuahua. 

 Shrub, 1 to 2 meters high ; leaves broadly ovate, 5 to 9 cm. long, acuminate, 



serrate-dentate ; capsule 7 to 9 mm. broad, short-muricate. 



