20 PROCEEDINGS OF THE AMERICAN ACADEMY. 



somewhat rigid, hispidulous; involucre campaiiulate, in fruit nearly 1 era. 

 broad, the scales tomentulose and covered with long spreading tawny or 

 darker colored glandular setae: corollas yellow : achenes columnar, nearly 

 black, striate, glabrous, 2 to 2.5 mm. long; pappus bright white or 

 slightly tawny. — H. Rusbyi, var. Wriyldii, Gray, Proc. Am. Acad. xix. 

 68(1883), & Syn. Fl. i. pt. 2, 428. Creph nmUgna, Gray, PI. Wright, 

 i. 129 (1852), not of PI. Fendl. H. mexlcanum^ Gray, Proc. Am. Acad. 

 xix. 70 (1883), in part, not Less. H. mexicanuin, var. niveopappuin, 

 Gray in Wats. Proc. Am. Acad, xviii. 1 10 (1883). — Western Tkxas : 

 between the Limpio and Rio Grande rivers, Wright (hb. Gr.). CoA- 

 HUILA : Sierra Madre south of Saltillo, Palmer, no. 757 (coll. of 

 1880), hb. Gr., doubtful. Chihuahua : hills near Chihuahua, Pringle, 

 nos. 592, 771 (both in hb. Gr.). Lower California: Saucito, 

 Brandegee (hb. Gr.). San Luis Potosi : in shady places near the city, 

 Schaffner, nos. 287, 288 (both in hb. Gr.) ; Parry ^ Palmer, nos. 552 

 553 (in both hb. Gr.). Durango : among hills, Palmer, no. 653 

 (coll. of 1896), hb. Gr. 



12. H. abscissum, Less. Stem 5 to 9 dm. high, hirsute, especially 

 below the middle : basal leaves oblanceolate, obtuse and mucrouate or 

 acute, slightly paler beneath, including the long gradually narrowed 

 petiolar portion 17' cm. in length, hairy upon both surfaces, rarely sub- 

 glabrous, cuspidate-denticulate to subsinuate-dentate ; cauline leaves 

 about 4, thin, oblong-lanceolate, the lower attenuate at the base, the 

 upper somewhat cordate-clasping: inflorescence at first thyrsoidal but at 

 leno'tli open and 3 to 4 dm. long; heads small, about 26-tlowered, slender- 

 peduncled : achenes 2 mm. long; pappus sordid. — Linnaea, v. 132 

 (1830); Fries, Symbol. Flierac. 148 (where the achenes are incorrectly 

 described as elongated), & Epicris. Hierac. 150 (excluding the indefinite 

 references to plants of the southern United States) ; Gray, Proc. Am. 

 Acad. xix. 70, & Syn. Fl. i. pt. 2, 430 ; Hemsl. Biol. Cent.-Am. 

 Bot. ii. 259. H. strignsum, Don, Trans. Linn. Soc. xvi. 175 (1830), 

 ex char. ; Arv.-Touv. Spicileg. Hierac. 7. H. Schaffneri, Sch. Bip. ace. 

 to Arv. Touv. 1. c. H. t/tyrsoideum spectabile, Fries, Symbol. Hierac. 

 141 (1848). K Friesii, Sch. Bip. Bonplandia, ix. 174, 326 (1861), 

 not Hart. H. Schultzii, Fries, Epicris. Hierac. 150 (1862). — Ncevo 

 Leon : on the Sierra Madre, Pringle, nos. 2205, 2838 (both in 

 hb. Gr.). San Luis Potosi : grassy hillsides, Las Canvas, Pringle, 

 no. 5077 (hb. Gr.). Tkuritory or Tepic : between Dolores and 

 Santa Gertrudis, Rose (hi). U. S. Nat. Mus.). Hidalgo : Real del 

 Monte, Coulter ([\\). Gr.). State of Mexico: near Tacubaya, Schaffner, 



