ROBINSON, — SPERMATOPHYTES OF MEXICO, 487 
broader and more pyramidal inflorescence, the two forms occurring upon 
the same individual ; involucre cylindric or in a dried state narrowly 
campanulate, the scales stramineous, striate, imbricated in about four 
very unequal series, the outer ovate, obtuse, pubescent or at least ciliate, 
the inner oblong-linear, acute, about 8 mm. long; flowers about 20: 
achenes columnar, 3 mm. long, olive brown, slightly hispid on the ribs. 
— Collected by C. G. Pringle on rocky hills near the city of Chihuahua, 
13 October, 1885, no. 610 (type, in herb. Gray). To this species I 
would refer the following specimens: from San Luis Potosi, Schaffner, 
no. 365, Parry & Palmer, no. 351; from Guanajuato, Dugés, no. 449; 
from Zacatecas, Deam, no. 140; from Durango, Palmer, no. 753. This 
Species is nearly related to and has been generally confused with the 
more southern B. veronicaefolia, Gray, a species which is readily distin- 
guishable by the extremely fine canescent non-glandular pubescence of 
its branchlets, in which the individual hairs cannot be seen without the 
use of a strong lens. The involucral scales of B. verontcaefolia are 
more clcsely imbricated and in more numerous rows. 
Var. umbratilis. Heads larger, 1.5 em. in diameter, terminal upon 
more elongated branches. — Collected by Dr. Edward Palmer in a shady 
ravine at Parras, Coahuila, October, 1898, no. 438, and also a solitary 
individual in a ravine at Mapimi, Durango, no. 521. 
Brickellia vernicosa. Shrub with striate buff or at length gray 
cortex and erect scabrous-puberulent branches: leaves alternate, ovate, 
serrate, acutish, bright green, coriaceous, veiny, subsessile, minutely his- 
pidulous, glandular-punctate beneath, often vernicose, 1 to 1.7 em. long: 
inflorescences cylindric thyrses I to 1.5 dm. long; bracts leaf-like but 
very small; heads subsessile, 1.2 em. long, on short branches ; involu- 
cral scales about 4-seriate, varying from ovate to linear-oblong, obtuse, 
minutely granular, striate: slender corollas 7 to 8 mm. long, the upper 
half violet: achenes slender, columnar, light-colored, 4 mm. long, 
upwardly hispid; pappus copious, 6 mm. long; styles yellow, only 
moderately clavate. —Collected by Dr. Edward Palmer at Santiago 
Papasquiaro, Durango, “ April and August,” 1896, no. 57. Related to 
B. baecharidea, Gray, but readily distinguished by its much longer 
achenes, ete. 
fonTANOA ARBORESCENS, Sch. Bip. (Montagnaea arborescens, DC. 
Prodr. v. 565). An examination of the type shows that the tips of the 
pales are recurved as in most of the other species of this genus and not 
inflexed as unfortunately described in the original characterization. 
The leaves are oblong-lanceolate, attenuate at each end, rather sharply 
