HiERAciuM. COMPOSlTiE. 413 



hairy, the lower narrowed at the base, the upper closely sessile ; the short thickish peduncles 

 and involucre glandularly hispid and downy ; achenia columnar, not attenuate at the summit. 

 —Michx. ft. 2. p. 86 ; Pursh, fl. 2. p. 504 ; Monn. I. c. ; DC. prodr. 7. p. 217 ; Torr. ^ 

 Gr. fl. N. Am. 2. p. 476. H. Marianum, Willd. sp. 3. p. 1572 (in part); Bigel. fl. Bost. 

 p. 288 ; Beck, hot. p. 166. H. Gronovii, ^., Hook. fl. Bor.-Am. 1. p. 300. 



Stem 1-3 feet high, often very hispid below. Leaves 1 J - 4 inches long, spreading, 

 varying from spatulate-oblong to nearly orbicular, very obtuse, with a small mucronate tip. 

 Panicle at first racemose, consisting of numerous rather small heads on diverging peduncles, 

 which are thickly clothed, as well as the lower part of the involucres, with brownish glandular 

 hairs. Flowers 40 - 50 in each head, pale yellow. 



Borders of woods, in dry soil ; rather common, particularly on Long Island and in the 

 vicinity of New-York. August - September. This species exudes more milky juice when 

 wounded, than any other of the genus here described. In shady places the stem is often 

 somewhat naked, and the panicle more open. 



3. HiERACiuM Gronovii, Linn. Gronoviuss Hawkweed. 



Stem virgate, leafy and very hairy below, naked and minutely pubescent towards the 

 summit, forming an elongated panicle ; leaves entire or denticulate, villous-hirsute, especially 

 along the midrib underneath and the margins ; the radical and lower cauline oblong-obovate 

 or spatulate ; the upper oval or oblong, closely sessile or partly clasping ; the slender pedun- 

 cles and the base of the involucre more or less hispid with glandular hairs ; achenia fusiform 

 and almost rostrate — Linn. sp. 2. p. 802 (syn. Gronov.) ; Michx. fl. 2. p. 87 (;8. foliosum) ; 

 Pursh, fl. 2. p. 503 ; Ell. sk. 2. p. 263 ; Hook. fl. Bor.-Am. I. p. 298 ; Torr. ^ Gr.fl. N. 

 Am. 2. p. 477 ; not of herb. Linn., Willd., DC. ^c. H. Marianum, Willd. sp. 3. p. 1572 

 (partly) ; DC. prodr. 7. p. 217 ; Nutt. in trans. Amer.phil. soc. (n. ser.) 7. p. 446. Steno- 

 theca Mariana, Monn. I. c. p. 72. t. 2. /. A. 



var. subnudum : stem slender, with one or few leaves near the base, naked and often smooth 

 above. Torr. ^ Gr. I. c. H. subnudum, Frcel. in DC. I. c. Stenotheca subnuda, Monn. 

 I. c. t. 2. /. A. no. 5. 



Stem 1 J - 2 feet high, mostly simple, paniculate at the summit. Leaves sprinkled with 

 longish hairs ; the lower ones tapering into a petiole at the base. Heads disposed in a long 

 naked panicle. Involucre hispid only on the lower portion, many-flowered. Achenia tapering 

 to each end, slender. 



Dry sandy soils, often in pine woods ; rare. July - September. From H. venosum, this 

 epecies is distinguished by its narrow panicle, shorter peduncles, hairy base of the stem, and 

 by the somewhat rostrate achenia. H. scabrum differs in stout leafy stem, much shorter 

 peduncles, and truncate achenia. 



