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..
Solidago leptocephala T. & G. Fl. N. A. 2: 226. 1841.
Euthamia leptocephala Greene, Mem. Torr. Club 5: 321. 1894.
Stem smooth, 1 1/2°-2 1/2° high, branched above. Leaves linear-lanceolate, acuminate or acute at each end, 1-nerved, or with a pair of indistinct lateral nerves, rough-margined, those of the stem usually 2-3' long, 2"-4" wide; heads about 3" high, rather narrow, sessile in the clusters of the flat-topped inflorescence; bracts of the subturbinate involucre linear-oblong, scarcely viscid; disk-flowers 3 or 4; ray-flowers 7-10.
In moist soil, Missouri to Louisiana and Texas. Aug.-Oct.
Euthamia gymnospermoides Greene, Pittonia 5: 75. 1902.
Solidago gymnospermoides Fernald, Rhodora 10: 93. 1908.
Usually branched from the base or from below the middle, glabrous, resinous, 1 1/2°-2° high, the branches strict, ascending. Leaves narrowly linear, 1"-2" wide, 3' long or less, light green, 1-nerved, or the larger 3-nerved; heads numerous, sessile in the clusters of the broad nearly flat-topped inflorescence; involucre turbinate, about 2 1/2" high, its bracts linear-oblong, blunt, very viscid; disk-flowers 4-6; ray-flowers about 12.
Prairies, Nebraska to Kansas, Texas and Louisiana. Aug.-Oct. Confused, in our first edition, with the preceding species.
?Erigeron carolinianum L. Sp. Pl. 863. 1753.
Solidago tenuifolia Pursh, Fl. Am. Sept. 540. 1814.
E. tenuifolia Greene, Pittonia 5: 77. 1902.
E. remota Greene, loc. cit. 78. 1902.
?S. Moseleyi Fernald, Rhodora 10: 93. 1908.
Glabrous and somewhat resinous, seldom over 1 1/2° high, branched above. Leaves narrowly linear, entire, acuminate, sessile, narrowed at the base, 1-nerved or with an additional pair of faint lateral nerves, l'-3' long, 1"-2" wide, punctate, often with smaller ones clustered in the axils, the resinous dots minute; heads about 1 1/2" high, very numerous and crowded in the dense nearly flat corymb; involucre oblong-cam-panulate, its bracts oblong; rays 6 -12; disk-flowers 4-6.
In dry sandy soil, eastern Massachusetts to Illinois, Wisconsin, Florida and Louisiana. Referred, in our first edition, to Euthamia caro-liniana (L.) Greene, but the identity of Erigeron carolinianum L. is doubtful. Aug.-Oct.
Solidago lanceolata minor Michx. Fl. Bor. Am. 2: 116. 1803.
Euthamia minor Greene, Pittonia 5: 78. 1902.
Solidago minor Fernald, Rhodora 10: 93. 1908.
Glabrous, bushy-branched above, 3º high or less. Leaves very narrowly linear, 1-nerved, the larger about 2b' long, not over 1" wide, often with tufts of smaller ones in the axils, the upper much smaller, often not more than 1/4" wide; heads very numerous, short-stalked, or sessile; involucre cylindraceous, about 2" high, its yellowish oblong bracts appressed, viscid; ray-flowers about 10.
In dry sandy soil, Virginia to Florida and Mississippi. Sept.-Oct.