ROBINSON AND GREENMAN. — GENUS PERYMENIUM. 525 



1. c. 182. — Mexico, Berlandier, ace. to DC. 1. c. To this species we 

 should refer Pringle's no. 6398 from hillsides about Cuernavaca, altitude 

 1,500 m. (a shrub 1.6 to 2.3 m. high) ; also an unnumbered specimen coll. 

 by Bates in Mexico in 1846. 



10. P. ASPERiFOLiUM, Sch. Bip, Involucral scales oblong-lanceolate, 

 acute, not very unequal, coarsely pubescent : leaves tuberculate-pu- 

 bescent and very scabrous above, copiously pubescent with softer hairs 

 beneath: rays "about 16, oval." — Sch. Bip. in Klatt, Leopoldina, xxiii. 

 143. — Ejutla, Mexico, Liebmann, no. 568. Type in herb. Bot. Gard. 

 Copenhagen ; a fragment and good drawing in herb. Gray. 



■w -w Leaves lanceolate to lance-oblong, acute at the base. 



11. P. chalarolepis. Shrub with slender quadrangular strigillose 

 branches : leaves lanceolate, narrowly acuminate, 3-nerved from above 

 the base, sharply serrate, finely pubescent and very scabrous upon both 

 surfaces, 4 to 6 cm, long, a fourth as broad, scarcely paler beneath ; 

 petioles slender, 6 to 9 mm. long: heads many, small (6 mm. in diameter 

 excl. of rays), borne in numerous open terminal 5-headed corymbs and 

 not at all umbellate ; involucral scales ovate, acuminate, with lax spread- 

 ing tips, at length purplish : rays 6 to 9, oblong, 6 mm. long : anthers 

 black. — Mountains of Chiapas, Dr. Ghieshreght, 1864—1870, no. 563* 

 Flowers in November. Type in herb. Gray. 



12. P. Ghiesbreghtii. Shrub, 1 to 2 m. high : branches tetragonal, 

 strigillose, soon glabrate : leaves lance-oblong, acute, serrate, 8 to 11 cm. 

 long, 2 to 3 cm. broad, glabrate and smooth above, green and finely 

 scabrous-pubescent beneath ; petioles 5 mm. long : inflorescences (young) 

 condensed and umbelliform : together forming a flat-topped corymb ; 

 involucral scales ovate, acute, minutely strigillose with white hairs : rays 

 7 to 8 mm. long. — Mountains of Chiapas, Dr. Ghieshreght, 1864-1870, 

 no. 576; also near San Cristobal in the same State, altitude 2.000 to 

 2,700 m., E. \V. Nelson, no. 3205. Flowers in September and October, 

 Type in herb. Gray. 



1- H- Involucral scales rounded or somewhat narrowed to an obtuse or 

 obtusish tip. 



*+ Inner involucral scales 3 to 6 mm. long. 



= Heads very small : involucre 3 mm. in diameter : scales ciliolate. 



13. P. MiCROCEPHALUM, Sch. Bip. Shrub : branches spreading, 

 tetragonal, minutely strigillose, soon glabrate : leaves ovate-lanceolate, 

 not exceeding 3 cm. in length, half as broad, sleuder-petioled, 3-nerved, 



