Hjeracium. COMPOSITiE. 477 



6. H. longipilum (Torr.) : stem virgate, simple, very leafy towards or near 

 the base, naked and somewhat glabrous towards the summit, bearing a small 

 racemose panicle ; the lower portion, and both sides of the oblong-lanceolate 

 or spatulale-lanceolate entire leaves densely clothed throughout with very long 

 and strict slender bristles; the spreading at length subcorymbose peduncles, 

 with the 20-30-flowered involucte, cinereous-pubescent or tomentose and 

 glandular-hispid; achenia fusiform, attenuated at the summit! — Torr.! in 

 Hook-Ji. Bor.-Am. 1. p. 298. (note under H. Scouleri, 1833.) H. barbatum, 

 Nutl. ! in jour. acad. Phiiad. l.p. 70 (1834), &fin trans. Amer. phil. soc. 

 I. c. ; not of Lois., or of Tausch. 



Prairies and open woods, from Michigan! to Illinois! Missouri! and 

 Arkansas ! extending nearly to the Rocky Mountains, according to Nuttall. 

 July-Sept. — Stem 15-30 inches high, very strict. Leaves 3-6 inches long, 

 an inch or less in width, tapering to the base, mostly sessile ; the uppermost 

 reduced to bracts. Inflorescence nearly as in H. scabrum ; the heads smaller 

 than in that species, but larger than is usual in H. Gronovii. Scales of the 

 involucre subulate. Achenia scarcely as much attenuated above as in H. 

 Gronovii. The bristly hairs which so remarkably distinguish this plant, which 

 are either whitish or brownish, are all ascending, not shaggy, but straight and 

 even, as if combed, and are frequently an inch in length ! They are slightly 

 dilated or papilliform at the base, and are denticulate under a lens, as in all 

 the species of this section. — We should not have deemed it proper to restore 

 the natne under which this singular plant was first indicated, though not fully 

 described, were it not probable that the H. barbatumof Tausch and Reicheu- 

 bach will continue a distinct species, and necessarily retain that name. 



7. IT. Gronovii (Linn.) : stem virgate, leafy and very hirsute below, 

 naked and minutely pubescent towards the summit, forming an elongated 

 panicle ; leaves entire or denticulate, mucronulate, pale, villous-hirsute, 

 especially along the midrib beneath and the margins ; the radical and lower 

 cauline oblong-obovate or spatulate ; the upper oval or oblong, closely sessile 

 or partly clasping ; the slender peduncles and the base of the involucre more 

 or less hispid with glanduliferous hairs ; achenia fusiform and almost rostrate ! 

 — Linn. ! spec. I. c, as to pi. Gronov. ; Michx. ! fl. 2. p. 87 (/3. foiiosum) ; 

 Pursh,fl. 2. p. 503 ; Ell. sk. 2. p. 263 ,- Hook. ! fi. Bor.-Am. I. p. 298 (var. 

 a.) ; not of herh. Linn., Willd., Frml. in DC, Sfc. H. foliis rad. obverse 

 ovatis, &c., Gronov. ! fl. Virg. p. 114. H. Marianum Pulmonarife Gallicse 

 folio, Pluk. mant. p. 102, t. 420, f. 2. H. Marianum, Willd. spec. 3. p. 1572 

 (at least partly!); Frcel. ! in DC. I.e.; Nutt. / in trans. Amer. phil. soc. 

 I. c. p. 446. Stenotheca Mariana, Monnier, Hier. p. 72, t. 2,f. A. 



13. subnudum : stem slender, with one or few leaves near the base, naked 

 and often glabrous above. — H. subnudum, Frcel. I. c. 1 {herb. DC. ! partly.) 

 Stenotheca subnuda, Monnier, I. c. t. 2.f. A, no. 5 (fruit). 



y. hirsutissimum : stem (except the summit) and leaves strongly hirsute 

 with very long shaggy hairs, arising from small papills. 



Dry sterile soil, common from Canada! to Florida ! Louisiana ! Arkansas! 

 and Texas ! y. Southern and Western States ! July-Sept. — The narrow 

 and elongated panicle, the hairy base of the stem, and the achenia tapering 

 so that they might be termed rostrate, abundantly distinguish the depau- 

 perate forms of this species from H. venosum. The more robust states have 

 often been confounded with H. scabrum. — From Tampa Bay, Florida, we 

 have a specimen of what appears to be a variety of this species, with the 

 pappus pure white when young, agreeing therefore in every respect with the 

 character of Crepis. 



8. H. venosum (Linn.) : stem or scape naked or with a single leaf, gla- 

 brous, slender, several times dichotomous, forming a diffuse compound 

 corymb (the divisions subtended by a subulate bract) ; radical leaves obovate 



