STANDLEY TEEES AND SHRUBS OF MEXICO. 327 



10. CERCOCARPtrS H. B. K. Nov. Gen. & Sp. 6: 232. 1823. 

 Shrubs or small trees, leaves entire or dentate, thick ; flowers axillary, soli- 

 tary or fasciculate, inconspicuous ; fruit with long feathery tails. 



Patoni gives the vernacular name of a Durango species as " lentisco." Be- 

 cause of their very hard, tough wood the plants are commonly known in the 

 United States by the name of " mountain mahogany." The wood of C. ledi- 

 folius Nutt. was used by the Gosiute Indians of Utah for bows. The Tewa 

 of New Mexico drink an infusion of the leaves of C. montanus Raf. (known 

 as "palo duro") with salt, as a laxative. 

 Leaves coriaceous, the veins very prominent beneath, impi-essed above. 



Leaves crenate 4. C. pringlei. 



Leaves serrate or dentate. 

 Leaf blades oval or elliptic, acute or subobtuse at the apex, the lateral 



veins mostly 12 to 20 on each side 1. C. macrophyllus. 



Leaf blades obovate to orbicular, rounded at apex, the lateral veins 5 to 

 10 on each side. 

 Leaves not conspicuously white-tomento.^i- beneath, the lateral veins 7 to 



10 on each side 2. C. fothergilloides. 



Leaves conspicuously white-tomentose beneath, the lateral veins 5 to 8 



on each side 3. C. mojadensis. 



Leaves not coriaceous, the veins neither very prominent nor impressed. 

 Leaf blades 2 to 6 cm. long, dentate at least at and above the middle. 

 Pubescence of the hypanthium and young leaves spreading. 



5. C. rotundifolius. 

 Pubescence of the hypanthium and young leaves appressed. 



6. C. betuloides. 



Leaf blades usuullj^ less than 2 cm. long, dentate only at the apex or entire. 



Pubescence of the hypanthium and young leaves appressed; hypanthium 



tube less than 6 mm. long 9. C, breviflorus. 



Pubescence of the hypanthium and young leaves spreading; hypanthium 

 tube 6 to 7 mm. long. 



Pubescence of short hairs 7. C. eximius. 



Pubescence of long, shaggy hairs 8. C. paucidentatus. 



1. Cercocai-pus macropliyllus C. Schneid. Haudb. Laubh. 1: 530. 1905. 



In the mountains, Jalisco to Veracruz and Guerrero ; type from Orizaba, 

 Veracruz. 



Shrub, 2 to 4 meters high ; leaves 4 to 11 cm. long, very thick, green above, 

 tonientose beneath, dentate ; tails of the fruit 5 to 6 cm. long. 



2. Cercocarpus fothergilloides H. B. K. Nov. Gen. & Sp. 6: 233. 1823. 

 Mexico and Puebla ; probably extending to Oaxaca ; type from near the 



City of Mexico. 



Shrub or small tree, 1 to 5 meters high ; leaves 2.5 to 4.5 cm. long, dentate, 

 lustrous on the upper surface. "Ramon," " zunu-ina " (Oaxaca). 



3. Cercocarpus mojadensis C. Schneid. Handb. Laubh. 1: 530. 1905. 

 Coahuila and Zacatecas; type from Sierra Mojada, Coahuila. 



Shrub or small tree ; leaves 2 to 4 cm. long, dentate, white-tomentose beneath ; 

 tails of the fruit 3 to 4 cm. long. 



4. Cercocarpus pringlei (C. Schneid.) Rydb. N. Amer. Fl. 22: 420. 1913. 

 Cercocarpus mojadensis prbuflei G. Schneid. Mitt. Deutsch. Dendr. Ges. 



14: 126. 1905. 

 Oaxaca ; type from La Hoya Canyon. 



Tree, up to 8 meters high ; leaves 3 to 6.5 cm. long, white-tomentose beneath. 

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