20 PROCEEDINGS OF THE AMERICAN ACADEMY. 
somewhat rigid, hispidulous; involucre campanulate, in fruit nearly 1 em, 
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. Wrightii, Gray, Proc. Am. Acad. xix. 
68 (1883), & Syn. FI. i. pt. 2, 428. Crepis ambigua, Gray, PI. Wright, 
i. 129 (1852), not of Pl. Fendl. H. mexicanum, Gray, Proc. Am. Acad. 
xix. 70 (1883), in part, not Less. H. mexicanum, var. niveopappum, 
Gray in Wats. Proc. Am. Acad. xviii. 110 (1883). — Western Texas: 
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, Cuimvanva: hills near Chihuahua, Pringle, 
nos. 592, 771 (both in hb. Gr.). Lower Carirornia: Saucito, 
Brandegee (hb. Gr.). San Luts Potost: in shady places near the city, 
Schaffner, nos. 287, 288 (both in hb. Gr.); Parry & Palmer, nos..992 
553 (im\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 mucronate oF 
acute, slightly paler beneath, including the long gradually narrowed 
petiolar portion 17 em. 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. 
Jength open and 3 to 4 dm. long; heads small, about 26-flowered, slender- — 
peduncled: achenes 2 mm. long; pappus sordid. — Linnaea, v- 132 — 
(1830); Fries, Symbol. Hierac. 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. FI. i. pt. 2, 430; Hemsl. Biol. Cent.-Am. 
~ 
Bot. ii. 259. H. strigosum, Don, Trans. Linn. Soc. xvi. 175 (1830) 
to Arv. Touv. lc. H. thyrsoideum spectabile, Fries, Symbol. Hierae- 
141 (1848). H. Friesti, Sch. Bip. Bonplandia, ix. 174, 326 (1861), 
not Hart. H. Schultzii, Fries, Epicris. Hierac. 150 (1862). — NUEVO 
Anon: on the Sierra Madre, Pringle, nos. 2205, 2838 (both in 
hb. Gr.). San Luis Porost: grassy hillsides, Las Canvas, Pringle, 
ex char.; Arv.-Touv. Spicileg. Hierac. 7. H. Schaffneri, Sch. Bip. ace ) 
San 5077 (hb. Gr.). Terrirory or Trvic: between Dolores and 
nta Gertrudis, Rose (hb. U. S. Nat. Mus.). H del 
8 7 ~  &: us.). Hrpareo: Real 
_ Monte, Coulter (hb. Gr.). State or Mexico: near Tacubaya, Schaffner 
