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..
Hieracium venosum L. Sp. Pl. 800. 1753.
Stems solitary or several from the same root, slender, glabrous, or with a few hispid hairs near the base, or also above, leafless or with 1-3 leaves, paniculately branched above, 1°-3° high. Basal leaves tufted, spreading on the ground, obovate, oval or oblong-spatulate, mostly obtuse, narrowed at the base, sessile or petioled, 1 -4' long, 1/2'-1 1/2' wide, usually purple-veined, glabrous or more or less hirsute, pale beneath, some or all of them glandular-der.Scu-late; heads commonly numerous, 5"-8" broad, 3-40-flowered, slender-peduncled; peduncles glabrous, or slightly glandular; involucre about 3" high, its principal bracts in 1 series, glabrous or nearly so, with a few short outer ones; achenes columnar, truncate; pappus brown, not copious.
Dry woods and thickets, Maine to Ontario and Manitoba, south to Georgia, Kentucky and Nebraska. Ascends to 4200 ft. in North Carolina. Early or vein-leaf hawk-weed. Striped blood wort. Snake-plantain. Hawkbit. Adder's-tongue. May-Oct.
Stem entirely glabrous up to the branches, rather slender, leafless or rarely with 1 or 2 leaves. 1 1/2°-21/2° high. Basal leaves tufted, ascending, spatulate, oblong, or obovate, obtuse, narrowed at the base, mostly petioled, glandular-denticulate or entire, villous-pubescent or somewhat hispid, 4-7' long, £-2' wide; heads corymbose-paniculate, several or numerous, 30-40-flowered, slender-peduncled, 8"-10" broad; peduncles and branches canescent-tomentose and glandular; involucre 5" high, its principal bracts in 1 series, linear, acute, densely pilose-glandular; flowers bright yellow; achenes columnar, truncate; pappus brownish, not copious. •
In dry soil, mountains of Pennsylvania to Ohio, Virginia and West Virginia. May-June.
H. florentinum All. Fl. Ped. 1: 213. 1785.
Stolons wanting; stem glabrous, or somewhat hispid, glaucous, slender, 1 1/2°-3° high, bearing 1-3 leaves near the base. Basal leaves tufted, narrowly oblong, oblanceolate, or spatulate, entire, obtuse or acute at the apex, narrowed below into margined petioles, more or less hirsute with stiff hairs, or glabrous, 2'-4' long, 3"-7" wide; heads several or numerous, corymbose, 4"-6" broad; peduncles mostly short, pilose and glandular; involucre about 3" high, its bracts linear, acute or acuminate, pilose and somewhat glandular, imbricated in about 2 series; flowers yellow; achenes oblong, truncate; pappus a row of slender brownish bristles.
In fields, meadows and along roadsides, New York and Ontario to Quebec and Maine; a troublesome weed. Naturalized from Europe. Referred in our first edition to H. praealtum. also native of Europe, which differs in having long leafy branches from the base, and is recorded as established in a meadow at Andover, Massachusetts. June-Sept.