STANDLEY TREES AND SHRUBS OF MEXICO. 607 



15. Pedilanthus pavonis (Klotzsch & Garcke) Boiss. in DC. Prodr. 15": 6. 1866. 

 Diadcnaria pavonis Kiotzsch & Garcke, Abh. Akad. Berlin 108. 1860. 

 Colinia and perhaps elsewheie, the type from some unknown Jlexican locality. 

 Leaves 12 to 17.5 cm. long, 6.5 to 7.5 cm. wide, subsessile, acute, glabrous ; 



involucres 1.6 to l.S cm. long. 



This is the name which has usually been applied to Mexican species of the 

 genus by local writers. The following vernacular names have been reported, 

 but they probably refer to other species : " Candelillo " or " candelilla " (Jalisco, 

 Oaxaca) : "jumete" (Jalisco, Oaxaca) ; " cordobs'in," " venenillo " (Oaxaca). 

 The plant is reputed to have purgative, emetic, enmienagogue, and antisyphilitic 

 properties. 



16. Pedilantlius palmeri Millsp. Field Mus. Bot. 2: 364. 1913. 

 Known only from Tepic, the type locality. 



Leaves acute or obtuse, cuneate at base, glabrous, sometimes 15 cm. long; 

 involucres red, 1.5 cm. long. 



17. Pedilanthus tomentellus Robins. & Greenm. Amer. Journ. Sci. 50: 164. 

 1896. 



Oaxaca ; type from the city of Oaxaca. 



Shrub, 1.5 to 2.5 meters high: leaves 4 to 5 cm. long, acute, pubescent; in- 

 volucres 1.2 cm. long. " Cordoban," " cordobancillo." 



18. Pedilanthus greggii Millsp. Field Mus. Bot. 2: 363. 1913. 

 Known only from the type locality, somewhere in Jlexico. 



leaves oblong-lanceolate, about 9 cm. long and 3 cm. wide, acute, puberulent. 



19. Pedilanthus olsson-sefferi Millsp. Field Mus. Bot. 2: 363. 1913. 

 Known only from the type locality, Tomellfn, Oaxaca. 



Leaves oblong to ovate, 3 to 6 cm. long, obtuse, puberulent beneath ; involucre 

 1 cm. long. 



20. Pedilanthus involucratus (Klotzsch & Garcke) Boiss. in DO. Prodr. 15': 

 6. 1862. 



Diadenaria invohicnita Klotzsch & Garcke, Abh. Akad. Berlin 107. 1860. 



Described from cultivated plants which were believed to be of Mexican 

 origin. 



Shrub, about a meter high ; leaves petiolate, oblong, 7.5 cm. long, puberulent 

 beneath. 



21. Pedilanthus rubescens T. S. Brandeg. Zoe 5: 209. 1905. 

 Sinaloa ; type from Guliacrm. 



Sh.rub, 1 to 2 meters high, with pale branches; leaves 9 cm. long or smaller, 

 ovate-lanceolate, nearly glabrous ; floral leaves purplish red ; involucres 2 cm. 

 long. 



DOUBTFUL SPECIES. 



Pedilanthus ghiesbreghtianus Baill. Adansonia 1 : 340. 1861. Described 

 from Mexico. 



Pedilanthus tehuacanus T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 55. 1914. 

 Type from Tehuacan, I'uebla. No material seen by the writer, the diagnosis 

 too incomplete for determination of the position of the species. 



3. TETRACOCCUS Engelm. ; Parry, West Amer. Sci. 1 : 13. 1885. 

 1. Tetracoccus dioicus Parry, West Amer. Sci. 1: 13. 1885. 



Teiracoccns engelmanni S. Wats. Proc. Amer. Acad. 20: 373. 1885. 



Northern Baja California ; type from Santo TomS,s. 



Much-branched glabrous shrub ; leaves mostly opposite, linear, 1 to 2.5 

 cm. long, entire; flowers small, dioecious, apetalous, mostly solitary in the 

 axils ; capsule 4-lobate, about 6 mm. in diameter. 



