ROBINSON AND GREENMAN. — GENUS PERYMENIUM. 525 
lc. 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. Asperrro.ium, 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. 
++ ++ 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 
ms 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. Ghiesbreght, 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-ob 
long, 2 to 3 em. broad, glabrate and smooth above, green and finely 
Scabrous-pubescent beneath ; petioles 5 mm. long: inflorescences (young) 
condensed and umbelliform: together forming a flat-top corymb ; 
involucral scales ovate, acute, minutely strigillose with white hairs: rays 
7 to 8 mm. long. — Mountains of Chiapas, Dr. Ghiesbreght, 1864-1870, 
20. 576; also near San Cristobal in the same State, altitude 2,000 to 
2,700 m., E. W. Nelson, no. 3205. Flowers in September and October. 
Type in herb. Gray. 
+ + Involucral scales rounded or somewhat narrowed to an obtuse or 
obtusis 
long, acute, serrate, 8 to 11 cm. 
++ Inner involucral scales 3 to 6 mm. long. 
= Heads very small: involucre 3 mm. in diameter: scales ciliolate. 
13. P. microcerHatum, Sch. Bip. Shrub: branches spreading, 
tetragonal, minutely strigillose, soon glabrate: leaves ovate-lanceolate, 
hot exceeding 3 cm. in length, half as broad, slender-petioled, 3-nerved, 
