GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC. 269 
lanceolate and obtuse or acute, greenish or purplish: mature achenes 
5 mm. 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 (hb. Gr.). 
The rather unusual involucre with its squarrose 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. Filemén 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 em. long, 1 to 5 em. 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-lentate, 
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 
em. 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 (hb. 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 Wis- 
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 (hb. Gr., and hb. U. S. Nat. Mus.). 
The achenes, although originally described as glabrous, are not infre- 
