This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
H. scabriusculum Schwein. in Long's Exp. 2: 394. 1824.
Stem rather slender, glabrous or puberulent, sometimes hispid below, usually very leafy nearly or quite up to the inflorescence, usually simple, 1°-21/2° high. Leaves lanceolate or linear-lanceolate or the lowest spatulate, entire, denticulate or sometimes laciniate-dentate, acute or acuminate, narrowed to a sessile base, 1'-3' long, 2"-7" wide, glabrous above, mostly somewhat pubescent beneath, the margins commonly ciliolate; no tuft of basal leaves at flowering time; heads few or several, corymbose, about 1' broad; peduncles rather stout, canescent; involucres 5"-7" high, glabrous or somewhat pubescent, its bracts imbricated in 2-3 series, the outer spreading; flowers bright yellow; achenes columnar, truncate; pappus copious, brownish.
Minnesota to Nebraska, Saskatchewan, British Columbia and Oregon. Included in our first edition in the similar Old World H. umbellatum L. Apparently erroneously recorded from the St. Lawrence River. June-Aug.
Stem, at least its lower portion, and leaves densely covered with long brown rather rigid bristly hairs 1/2-1' long, arising from papillae; stem very leafy below, stiff, simple, 2°-31/2° high. Basal and lower leaves spatulate or oblong, obtuse, mostly entire, 4'-8' long, narrowed into margined petioles, the upper lanceolate or spatulate, mostly sessile, the uppermost small and bract-like; heads not very numerous, racemose or racemose-paniculate, 8"-10' broad; peduncles short, stout, tomentose and glandular; involucre 4"-5" high, its principal bracts in 1 series, linear-lanceolate, acuminate, with several short subulate outer ones; flowers yellow; achenes fusiform with a slightly tapering summit; pappus brown.
Hieracium paniculatum L. Sp. Pl. 802. 1753.
Glabrous throughout, or somewhat pilose-pubescent below, stem paniculately branched above, leafy, slender, 1°-3° high. Leaves thin, lanceolate or oblong-lanceolate, acute or acuminate at the apex, narrowed to a sessile base, or the lowest into petioles, denticulate or dentate, 2'-6' long, 3"-12" wide; no tuft of basal leaves at flowering time; heads 5"-/" broad, commonly numerous, corymbose-paniculate, 12-20-flowered; peduncles slender, often drooping, quite glabrous or sometimes glandular; involucre about 3" high, glabrous or nearly so, its principal bracts in 1 series, linear, acute with a few very small outer ones at the base; flowers yellow; achenes columnar, truncate; pappus brown, not very copious.
In dry woods, Nova Scotia to Ontario, Michigan, Georgia, Alabama and Tennessee. Ascends to 4600 ft. in Virginia. July-Sept.