OF ARTS AND SCIENCES. 153 



erect calyx-teeth: seed smooth. — Shaded hillsides near Guadalajara; 

 September, 1889 (n. 2464). With the liabit of S. glabra. 



JALISCOA ; new genus of EupatoriacecB. Heads few-llowered. 

 Involucres obloiig-campanulate, its scales few, in two rows, nearly 

 equal, narrowly oblong, strongly concave, scarcely nerved. Recepta- 

 cle small, paleaceous, the caducous palen^ resembling the involucral 

 scales and embracing the uchejies. Corolla gradually dilated above 

 the narrow base, 5-toothed. Anthers short-appendaged, obtuse at 

 base. Style-branches somewhat papillose. Achenes glabrous, linear, 

 4-angled, the angles thickened and the truncate apex dilated. Pappus 

 none. — Suffrutescent, erect and branched ; leaves opposite at least 

 on the branches, petiolate, dentate, sub-triply nerved; heads small, 

 in terminal corymbs or corymbose panicles ; flowers white. 



J. PiiiNGLEi. Much branched and nearly glabrous, 6 to 8 feet 

 high : leaves ovate to lanceolate, acuminate, cuneate at base, 2 to 4 

 inches long, minutely pubescent as well as the inflorescence : heads 

 numerous, 1\ lines long, about 10-flowered, the exserted corollas as 

 long. — Talus of cool ledges, bluffs of the Rio Grande de Santiago, 

 Jalisco; October and November, 1889 (n. 2198 and 2491). The 

 genus is near Alomla and Aschenhornia, distinguished especially by 

 the narrow concave scales and chaff embracing the achenes. 



Ageratdji (Ccelestina) callosum. Perennial, the herbaceous 

 ascending stems about a foot high, floccose-pubescent throughout ; 

 branches spreading : leaves thin, ovate, rounded or subtruncate at 

 base, acute, crenately serrate, 2 inches long or less, much exceeding 

 the petioles: heads in small terminal corymbs ; involucre 2 lines long, 

 nearly glabrous, the narrow usually purplish scales 2-3-nerved below ; 

 receptacle nearly flat : corolla white, glabrous : achenes very small 

 (scarcely ^ line long), slightly scabrous on the angles, with a prom- 

 inent subglobose basal callus ; pappus an entire cup-shaped crown 

 with incurved margin. — On wet cliffs near Guadalajara ; December, 

 1888 (n. 21 G6). With the habit of A. comjzoides. 



Heliopsis filifolia. Herbaceous, branching from the base, 

 glabrous, a foot high or more : leaves filiform, 2J inches long or less, 

 opposite and fascicled, the upper alternate : involucre broadly cam- 

 panulate, slightly pubescent, the oblong nerved scales acutish : ligules 

 elliptical, 3-toothed, 3 or 4 lines long : achenes glabrous, obtusely 

 tetragonal, truncate, strongly tubcrculate. — On limestone hills at 

 Carneros Pass, Coahuila ; September, 1889 (n. 2396). 



Zaluzania resinosa. Tall and stout, the angled stem and 

 branches loosely tomentose or glabrate : leaves broadly rhombic- 



