GREENMAN. — NEW ANGIOSPERMS FROM MEXICO. 103 



branches, usually on long slender peduncles : involucre 3-seriate ; bracts 

 of the involucre narrowly ovate-lanceolate, about 8 mm. long, acute, 

 appressed-pubescent ; the outer sometimes a little shorter ; the inner- 

 most more oblong and thinner : ray-flowers neutral, few, 5 to 8, yellow : 

 disk-flowers 20 to 30 ; pales of the recej^tacle somewhat keeled, and 

 purplish along the median line :, achenes pubescent, maculate with 

 purple-magenta patches. — Mexico. State of Chihuahua : in the 

 Sierra Madre, near Seven Star Mine, altitude 2450 m., 28 August, 

 1899, Townsend § Barber, no. 380 (hb. Gr.). > This species is nearly 

 allied to Aspilia angustifolia, Gray, but it differs in the longer, less 

 pubescent leaves, and in the more acuminate outer bracts of the 

 involucre. 



Viguiera brevifolia. A much-branched shrub, 1 m. or less in 

 height : stems terete, covered with a grayish bark ; ultimate branches 

 canous-strigose : leaves opposite below, alternate above, lanceolate- 

 triangular to somewhat ovate, acute to obtuse, entire or subcrenate and 

 revolute-rnargined, mostly abruptly narrowed at the base into a short 

 petiole, densely appressed-canous-pubescent on both surfaces, espe- 

 cially beneath and on the short petioles : heads 1 cm. or less high, ter- 

 minating the stem and branches, on long slender peduncles, radiate, 

 including the rays about 1.5 cm. in diameter: involucre campanulate ; 

 bracts of the involucre 2-3-seriate, lanceolate to ovate, acute, about 

 4 mm. long, externally canous-appressed-pubescent : ray-flowers' 8 to 

 10; rays oblong, 6 to 7 mm. long, yellow : disk-flowers numerous, 50 

 to GO : pappus of two slender aristae, equalling or slightly exceeding the 

 intermediate lacerated scales : mature achenes 3 mm. long, sparingly 

 pubescent. — Mexico. State of Durango : Mapimi, 21 to 23 October, 

 1898, Dr. Edward Palmer, no. 527 (hb. Gr., and hb.-U. S. Nat. Mus.). 



In general habit this species most resembles the Lower Californian 

 Viguiera microphylla, Vasey & Rose, but is readily distinguished from 

 it by the character of the inflorescence. 



Viguiera cordifolia, Gray, var. latisquama. Habit, cauline, 

 foliar and inflorescence characters of the type of the species : involucral 

 bracts imbricated, 3-seriate, linear-oblong, 2 to 3.5 mm. broad, somewhat 

 rounded or very abruptly narrowed at the tip and terminated by a 

 mucro ; the outer bracts shorter than the inner ones : floral and achenial 

 characters of the species proper. — Mexico. State of Durango : vicinity 

 of the City of Durango, September, 1896, Dr. Edward Palmer, no. 

 067, and no. 747 (hb. Gr.). 



A very distinct variety, and possibly worthy of specific rank. 



