GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC. 269 



lanceolate and obtuse or acute, greenish or purplish : mature achenes 

 5 rara. long, glandular-hirtellous. — Mexico. State of Hidalgo : under 

 dry cliffs between Metepec and Zontecomate Stations, altitude 2590 m., 

 19 September, 1904, C. G. Pringle, no. 8871 (lib. Gr.). 



The rather unusual involucre with its s<juarrose broad-tipped more or 

 less herbaceous bracts readily characterizes this species and renders it 

 easily distinguishable among all other species of the genus. It is named 

 in honor of Sr. Filemon Lozano, worthy assistant of Mr. C. G. Pringle. 



Perezia megacephala, n. sp. An herbaceous perennial, glabrous 

 throughout: stem simple, erect, about 6 dm. high, springing from an 

 enlarged ferrugineous-tomentose base, striate : leaves obovate-oblong to 

 oblanceolate, 2.5 to 11 cm. long, 1 to 5 cm. broad, obtuse or acutish, 

 serrate-dentate to entire, thick and firm in texture, conspicuously reticu- 

 late-veined on both surfaces, strongly ascending and subimbricated on 

 the stem ; the lower leaves largest, semiamplexicaul and serrate-dentate? 

 the upper smaller, narrowed to a petiole-like base and entire: heads 

 large, 3.5 to 4 cm. high and about as broad, solitary, terminating the 

 stem : involucre broadly campanulate ; bracts of the involucre 6—7- 

 seriate, those of the outer series oblong and mucronate-acute, the inner- 

 most lanceolate, acute and purplish-tipped : flowers numerous, 2 to 2.5 

 cm. long: corollas purplish: achenes about 7 mm. long, glabrous. — 

 P. Wislizeni, var. megacephala, Gray, Proc. Am. Acad. xxii. 433 

 (1887). —Mexico. State of Jalisco: Rio Blanco, October, 1886, Dr. 

 Edward Palmer, no. 655 (lib. Gr.). Dr. Palmer's plant was regarded 

 by Dr. Gray as a variety of P. Wislizeni. The latter is now well 

 represented in the Gray Herbarium through the collections of \Yis- 

 lizenus, Pringle, Palmer, and Nelson ; it is a species showing little 

 tendency to extreme variation, and is characterized especially by the 

 glaucous nature of stem and foliage, the upper portion of the stem 

 being essentially naked, and by the comparatively few broad outer 

 involucral bracts. In P. megacephala, on the other hand, the bloom 

 is absent, the stem is leafy to the single terminal head, and the outer 

 involucral bracts are more numerous, longer, and broader. In view 

 of these apparently constant differences the writer has no hesitation 

 in raising Dr. Gray's variety to specific rank. 



Perezia Montana, Rose. Contr. U. S. Nat. Herb. i. 105, t. 8 

 (1891). Specimens of this very distinct species have been secured 

 by Dr. Edward Palmer at Santiago Papasquiaro, .State of Durango, 

 April and August, 1896, no. 59 (lib. Gr., and hb. U. S. Nat. Mus.). 

 The achenes, although originally described as glabrous, are not infre- 



