154 PROCEEDINGS OF THE AMERICAN ACADEMY 



ovate (6 inches long by 4 broad) to lanceolate upon the branches, 

 short-acuminate, narrowed at base to a short stout petiole, subcre- 

 nately serrate, rougiiish-puberulent above, thinly tomentose beneath 

 and witli numerous minute resinous globules: heads corymbose ou 

 short pedicels ; outermost iuvolucral scales herbaceous, the rest thin, 

 elliptical, obtuse, many-nerved: rays 3 or 4 lines long: achenes large 

 for the genus (1^ lines long). — In the Sierra Madre near Monterey ; 

 August, 1889 (n. 2412). 



Wyethia Mkxicana. Woody at base, 3 to 5 feet high, rather 

 slender, rough-hispid : leaves thin, alternate, slenderly petiulate, ovate 

 or the upper lanceolate, cordate or the upper rounded at base, short- 

 acuminate, soft-tomentose beneath, scabrous and subpubescent above, 

 3 or 4 inches long : heads ou axillary and terminal peduncles, ^ inch 

 high ; involucre campanulate, of several rows of rather rigid-based 

 bracts with long foliaceous acuminate tips : ray-flowers pistillate, 

 numerous, the narrow ligules 9 lines long : achenes small (scarcely 

 2 lines long), obtusely quadrangular with the sides sulfate ; papjDus of 

 several unequal acute or acuminate rigid persistent scales united at 

 base. — Grassy foothills of the Sierra Madre near Monterey ; June, 



1888 (n. 1923). Rather abnormal in habit and involucre, but the 

 achene, though small, and pappus are wholly those of the genus. 



Perymenium album. Suffrutescent, the branches hispidulous- 

 scabrous : leaves rather narrowly lanceolate, very shortly petiolate, 

 acuminate, rounded or cuneate at base, entire or sparsely serrulate, 

 very scabrous above, pubescent beneath, 1 to 2^ inches long: heads 

 few in terminal corymbs and solitary on short lateral branchlets, the 

 short stout peduncles pubescent ; involucral scales lanceolate, acutish, 

 pubescent : rays white, very broadly obovate, 2 lines long, crenately 

 few-toothed : achene subtetragonal ; pappus-bristles distinct. — In 

 the mountains near Lake Chapala ; December, 1889 (n. 2438). 



Chuysactinia thuncata. Suffrutescent, low, much branched, the 

 slender herbaceous branches short (2. or 3 inches), glabrous : leaves 

 opposite or alternate, pinnately divided, the segments (1 to 3 pairs) 

 cuneate, entire or with a lateral tooth, truncate, mucronate, the mucro 

 bearing a prominent gland (the leaves otherwise glandless) : pedun- 

 cles terminal, short: involucral scales 12, two lines long: rays bright 

 yellow : achenes, pappus, corolla, style-branches, etc., as in C. Mexi- 

 cana. — Summit ledges of the Sierra de la Silla, Nuevo Leon ; June, 



1889 (n. 2601). 



Chuysactinia pinnata. Glabrous throughout or nearly so ; 

 stems herbaceous, erect, slender, branching, a foot high or more : 



