ROBINSON AND GREENMAN. — HIERACIUM. 17 



•*- -t- Achenes 3.5 to 4.5 mm. long, columnar or very gradually attenuate toward 



the summit. 



-+ Cauline leaves none, the basal rosulate, very short. 



4. H. junceum, Friks. Stem filiform, 13 to 22 cm. high, loosely 1- 

 several-branched : basal leaves subsessile, obovate, hirsute upon both sur- 

 faces, obtuse: heads 3 to o, few-flowered, on elongated flocculent-pubes- 

 cent peduncles ; involucres slender, the inner scales elongated, linear, 

 with, a few dorsal glanduliferous hairs : achenes long and slender, brown- 

 ish black, not conspicuously attenuate; pappus reddish white. — Symbol. 

 Ilierac. 144 (1848), & Ein^ris. Ilierac. 149; Hemsl. Biol. Cent.-Am. 

 Bot. ii. 259. — Oaxaca : in pine woods, Cambre de Ixlepec, alt. 3300 

 m., Liebtntuin (sketch in lib. Gr.). 



Var. angustifoliutn, Fries. Leaves narrower: achenes more evi- 

 dently attenuated. — Epicris. Hierac. 149 (1862). — " Sierra de 

 Moucayo " (hb. Martins, ace. to Fries, 1. c). Not seen. 



♦* -»-»• Cauline leaves present, lance-linear, entire, 12 times as long as wide. 

 = Peduncles glabrous or sparingly hispid. 



5. H. carneum, Guek.ne. Stem nearly or quite glabrous from the 

 base, glaucous, branched from the middle : basal leaves elliptical, subses- 

 sile, thickish, densely covered with long white hairs (rufous in diied 

 specimens) ; stem-leaves long and relatively narrow, acute, nearly or 

 quite glabrous : involucral scales green and glabrous : corollas deep 

 flesh-colored. — Bot. Gaz. vi. 184 (1881) ; Gray, Proc. Am. Acad. xix. 

 69, «fe Syn. Fl. i. pt. 2, 430. — New Mexico : oak woods, south base of 

 Pinos Altos Mountains, Greene (hb. Gr.). 



Var- chihuahuense, n. var. Basal leaves attenuate below to a 

 narrow petiole-like base ; lower cauline leaves, peduncles, and involucral 

 scales sparingly pubescent: corollas white. — Chihuahua : foothills of 

 the Sierra Madre, Prmgh, no. 1315 (hb. Gr.) ; near Colonia Garcia in 

 the Sierra Madre, Nelso7i, no. 6192 (hb. U. S. Nat. Mus.). 



= = Peduncles tomentulose.' 



6. H. prionobium, n. sp. Stems 1 to 3, erect, 6 to 8 dm, high, cov- 

 ered below with rather copious spreading or slightly deflexed hairs: 

 basal leaves spatulate or oblanceolate, 15 to 20 cm. long, 10 to 25 mm. 

 wide, obscurely denticulate, rounded at the apex, erect, hairy on both 

 surfaces; the cauline leaves lance-linear, sessile, acute, essentially entire, 

 6 to 20 cm long, 3 to 15 mm. broad, sparingly pubescent: heads about 

 12, in an open loose corymbose panicle; peduncles curved-ascending, 1 



VOL. XL. — 2 



