STANDLEY TREES AND SHRUBS OF MEXICO. 671 



18. Rhus schiedeana Schlecht. Linnaea 16: 480. 1842. 



Baja California to San Luis PotosI, Puebla, and Chiapas; type from Barranca 

 de Santa Maria, Hidalgo. 



Leaflets 9 to 13, oblong, lance-oblong, or lanceolate, 2 to 7 cm. long, long- 

 petiolulate. usually acute or acuminate, paler beneath, glabrate or densely pubes- 

 cent ; panicles las or dense, 5 to 20 cm. long, puberulent; petals 3 mm. long; 

 fruit 6 to 8 mm. in diameter. 



The material at hand is variable, especially in pubescence, and may represent 

 more than one species. The single Baja California specimen is rather imper- 

 fect, but it seems to belong here. 



19. Rhus terebinthifolia Schlecht. & Cham. Linnaea 5: 600. 1830. 

 Rhus rimjoUa Turcz. Bull. Soc. Nat. Moscou 31': 470. 1858. 

 Rhus subcordata Turcz. Bull. Soc. Nat. Moscou 31': 470. 1858. . 

 Rhus palmeri Rose, Contr. U. S. Nat. Herb. 1: 95. 1891. 



Sonora to Veracruz and Chiapas ; typo from Papantla, Veracruz. Guatemala. 



Shrub, 1 to 2 meters high, or probably larger ; leaflets 3 to 15, oblong to 

 ovate or obovate, 2 to 6 cm. long, obtuse to acuminate, sparsely or densely 

 puberulent or pilose beneath ; panicles usually large and lax ; petals 2 mm. 

 long ; fruit red or orange, 5 to 8 mm. in diameter. " Hierba de temazcal," 

 " temazcal,'' " yaga-biche " (Oaxaca, Relco). 



Reko reports that the Zapotecs of Oaxaca employ the plant in steam baths 

 {Temazcal, a sweat-bath hut) as a remedy for rheumatism and syphilis, and 

 as a preparation for parturition. 



20. Rhus jaliscana Standi. Contr. U. S. Nat. Herb. 20: 219. 1919. 

 Jalisco ; type from the barranca near Guadalajara. 



Slender shrub, 3 to 4.5 meters high ; leaflets elliptic or elliptic-oblong, 

 usually obtuse, appressed-pilose beneath ; panicles large and open ; fruit 5 to 

 7 mm. in diameter. 



21. Rhus barclayi (Hemsl.) Standi. Contr. U. S. Nat. Herb. 20: 218. 1919. 

 Rhus tcrelnnthifolia barclayi flemsl. Biol. Centr. Amer. Bot. 1: 219. 1880. 

 Tepic to Guerrero ; type from Acapulco, Guerrero. 



Slender shrub ; leaflets ovate or oblong-ovate, acute or acuminate, hispid- 

 pilose beneath with subappressed hairs ; panicles large and open, the branches 

 puberulent ; fruit about 6 mm. in diameter, 



DOUBTFUL SPECIES. 



Rhus saxatilis DC. Prodr. 2: 71. 1825. Described from Mexico, the descrip- 

 tion based upon one of Sesse and Mocino's plates. The plant belongs to some 

 other family. 



14. PACHYCORMUS Coville, Cent. Diet. rev. ed. 6708. 1911. 



1. Pachycormus discolor (Benth.) Coville, Cent. Diet. rev. ed. 6708. 1911. 



Schinus discolor Benth. Bot. Voy. Sulph. 11. pi. 9. 1844. 



Rhus veatchiana Kellogg, Proc. Calif. Acad. 2 : 24. 1863. 



Yeatchia cedrosensis A. Gray, Proc. Araer. Acad. 20: 290. 1885. 



Bursera puhescens S. Wats. Proc. Amer. Acad. 24: 44. 1889. 



Veatchia discolor T. S. Brandeg. Proc. Calif. Acad. II. 2: 140. 18S9. 



On plains and mountain slopes, Baja California; type from Magdalena Bay. 



Tree, 2 to 4.5 meters high, with very short trunk, the branches numerous, 

 large and thick, usually very crooked and frequently lying upon the ground, 

 often 6 meters long; bark thin, yellowish, peeling off in thin papery sheets, 

 exposing the green under surface ; leaves pinnate, soon deciduous ; leaflets 3 to 



