ROBINSON AND GREENMAN. — HIERACIUM. 23 



Toluca, alt. 2900 in., Priiujle, no. 4284 (lib. Gr.). Pukbla : Popocate- 

 petl, Sehaff'ner, no. 67 (lib. Gr.). Vera Cruz : Mt. Orizaba, Schiede, 

 110. 285 (hb. Gr.), type ; alt. 3950 m., Liebmann (sketdi in hb. Gr.) ; 

 alt. 3050 m., Galeotti, no. 2173 (hb. Gr.) ; Seaton, no. 182 (hb. Gr.) ; 

 JRose ^ Hay, nos. 5750, 5751 (hb. U. S. Nat. Mus.). Guerueko : 

 between Tixtla and Chilpancingo, alt. 1820 to 2140 m., Nelson (hb. 

 U. S. Nat. Mus.) ; top of Sierra Matlre near Chilpancingo, alt. 2750 

 to 3180 m., Nelson, no. 2192 (hb. U. S. Nat. Mus.). Oaxaca : 

 summit of INIt. Zempoaltepec, alt. 3475 m.. Nelson, no. 634 (hb. U. S. 

 Nat. Mus. ). 



17. H. irasuense, Bknth. Near H. 'niexlcdnum but with a stem 

 less tall and seldom branched, covered throughout by a dark bristly 

 glandular pubescence as well as by a fine short and sordid tomentum : 

 leaves longer, 3 to 13 cm. in length, 1 to 2 cm. broad, subentii-e or con- 

 spicuously glandular-dentate: heads 10 to 15, crowded. — Benth. in 

 Oerst. Vidensk. Meddel. 1852, p. 113 ; Fries, Epicris. Hierac. 144. Re- 

 ferred by Hemsl. 1. c. 259 to H. lagopus, Don. — Costa Kica : on the 

 Volcano Irazu, alt. 2925 m., Oersted; also at Laguna del Reveutado, 

 alt. 2300 m., 1 January, 1901, H. Pittier, no. 14,074 (hb. Gr.). 



* * Pubescence on both surfaces of the leaves long, truly woolly, of matted or 



felted hairs. 



18. H. Pringlei, Gray. Stem 34 to G8 cm. high, woolly toward 

 the base : leaves chieHy basal, rosulate and decumbent upon the ground, 

 obovate to oblanceolate, 7 to 10 cm. long, 20 to 35 mm. wide, obscurely 

 cuspidate-denticulate: heads 12 to 18, in an open corymb; involucre in 

 fruit 1 cm. long, involved in close wool through which short light- 

 colored bristles protrude : achenes columnar, reddish brown, 3 mm. long ; 

 pappus essentially white. — Proc. Am. Acad. xix. 69(1883), & Syn. 

 Fl. i. pt. 2, 429; Arv.-Touv. Ann. Conserv. Genev. i. 96. — South- 

 ern Arizona: Santa Rita Mountains, 6 May, 1881, Pringle, no. 314 

 (hb. Gr.), 2 June, 1884, Pringle (hb. Gr.), Lemmon, no. 369 (hb. Gr.). 

 To be expected in Mexico. 



19. H. jaliscense, n. sp. Root of strong dark brown fibres ; stem 

 subflexuous, 48 to 72 cm. high, simple to the corymbosely branched 

 inriorescence, glabrate above, lanate toward the base, the hairs long, 

 white, widely spreading or somewhat reflexed, matted : basal leaves 

 2 to 5, oblanceolate, 5 to 15 cm. long, 1.5 to 3 cm. wide, erect, cuspidate- 

 denticulate, rounded or obtuse, often apiculate at the apex ; cauline 

 leaves 1 to 3, lanceolate to linear : heads about 10 ; peduncles bristly 



