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 multiradiata Ait. Hort. Kew. 3: 218. 1789.
Stem glabrous or somewhat pubescent above, rather slender, 6-15' high. Leaves firm, glabrous or very nearly so, the basal and lower ones spatu-late or oblanceolate, entire, or sparingly serrate, obtuse, finely reticulate-veined, 3'-5' long, 3"-9" wide, the upper smaller, narrower, sessile, entire; heads about 4" high, usually few in a terminal rather compact, corymbose cyme, but the inflorescence sometimes elongated and thyrsoid; bracts of the involucre thin, linear-lanceolate, acute or acutish; glabrous; rays 8-15, prominent, linear, achenes pubescent.
Labrador and Hudson Bay to British Columbia, the Rocky Mountains and Colorado. July-Aug.
. Solidago decumbens Greene, of the Rocky Mountains, with broader involucral bracts is recorded from Mt. Albert, Quebec.
Solidago puberula Nutt. Gen. 2: 162. 1818.
Minutely puberulent, or glabrous, usually simple, rather slender, 11/2°-3° high, leafy. Stem leaves oblong-lanceolate, acute, sparingly serrate or entire, 1'-2' long, sessile, or the lower petioled, basal leaves and sometimes the lowest ones of the stem spatulate, obtuse, often sharply serrate, 2'-4' long, narrowed into margined petioles; heads about 2.1/2" high, in a terminal, often leafy thyrsus, the branches of which are spreading or ascending; bracts of the involucre subulate, very acute; achenes glabrous; heads rarely a little secund.
In sandy soil, Prince Edward Island to Florida and Mississippi, near the coast and on sandstone rocks in the Appalachian mountain system, west to Tennessee. Minaret-golden-rod. Aug.-Sept.
Solidago sricta Ait. Hort. Kew. 3: 216. 1789.
S. virgata Michx. Fl. Bor. Am. 2: 117. 1803.
Glabrous throughout, slender, erect, simple, 2°-8° high. Basal and lowest stem leaves oblong, or somewhat spatulate, with few lateral veins, obtuse, entire, or very sparingly dentate, 3'-8' long, 1/2'-1' wide, narrowed into long petioles; upper stem leaves abruptly smaller, narrowly oblong, spatulate or linear, appressed, the uppermost very small and bract-like; heads about 3" high, in a dense simple, or sometimes branched, naked thyrsus; bracts of the involucre oblong, obtuse, or the inner acutish; achenes glabrous, or sparingly pubescent.
In wet sandy pine-barrens, New Jersey to Florida and Louisiana. Also in western Cuba. Aug.-Oct.
Stem glabrous, rather stout, simple, 2°-4° high, the branches of the inflorescence more or less pubescent. Leaves oblong-lanceolate or lanceolate, glabrous, firm, more or less cilio-late or scabrous on the margins, few-veined, acute or acuminate, the lower and basal ones 4'-9' long, 1'-1 1/2' wide, more or less serrate and narrowed into petioles, the upper smaller, mostly sessile and entire; heads 2"-3" high, in a terminal oblong dense thyrsus, its branches appressed; bracts of the involucre linear-oblong, obtuse; achenes glabrous.
In swamps and bogs, Newfoundland to New Jersey, North Carolina, western Ontario, Minnesota and Wisconsin. Aug.-Sept.