12 PROCEEDINGS OP THE AMERICAN ACADEMY. 



obtuse, tufted :it the cuspidate apex, 9 mm. long, usually carinate, 



pale green with broad diaphanous margins; glands biseriate, approximate 

 in the keel, elliptical or oblong, not linear, amber colored: flowers about 

 16: corollas 7 nun. long, at anthesis about equalling the Bordid pappus; 

 the Blender proper tube about twice the length of the throat: achenes 

 Blender, « 1 ■ 1 1 1 black, upwardly hispid, 7 to 8 nun. long. — Collected by 



Dr. J. N. Rose at Guaymas, S >ra, Mexico, 5 to 11 .June, 1897, 



no. 1272. Near /'. obtus'folium, DC, which, however, lias more acute* 

 dark purple involucra] Bcales marked with (lark linear glands. 



Liabum Pringlei, Rob. ^v. Greenm. Proc. Am. Acad, xxxii. 49 

 The type specimen <>!' this species published by clerical error 

 as no. 6215 is 6214 of Pringle's Plantae Mexicanae 



Perezia Nelsonii. Tutted with rusty wool at the Blightly decum- 

 bent base; stein soon erect (probably 1 m. tall), subterete, Btri 

 branched, leafy about to the middle, glabrous and Bmooth, purplish: 

 leaves large (1.7 dm. long, G to 8 cm. broad), firm, retidulated, oblong- 

 oblanceolate, rounded, obtuse or acute at the apex, cordate-clasping at 

 the base, sharply dentate with small spreading teeth: branches ascending,. 

 nearly naked : head- few, large, many-flowered, 2.5 to 3 cm. long and 

 broad; pedicels 2 to 5 cm. long, bearing several small lanceolate attenu- 

 ate appressed scale-like bracts passing gradually into the broader ovate 

 to oblong or at length lance-oblong involucral scales, these green with a 

 slight purple tinge, ciliolate, imbricated in about 7 rows, the middle and 

 inner ones obtuse or rounded and mucronate at the tips, the outer acute, 

 slightly spreading and pungent: purple strongly bilabiate corolla 1.5 cm. 

 long: columnar granulated achene 1 mm. long. — Collected by E. W. 

 Nelson on mountains near Talpa, .Jalisco, Mexico, altitude 1.100 to 

 1,500 m., 7 .March, 1.SU7. no. 4037. A species near P. michoacana 

 and P. cuernavacana, but clearly distinct from either. 



