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..
An erect, perennial herb, with the aspect of a golden-rod. Leaves alternate, the lower and basal ones large, cordate, long-petioled, the upper ovate, short-petioled or sessile. Heads composed of both tubular and radiate flowers, sessile, in a terminal narrow spike-like thyrsus. Involucre narrowly campanulate, its bracts coriaceous, imbricated in few series, the outer successively smaller. Receptacle small, naked. Rays small, yellow, pistillate. Disk-flowers perfect, their corollas tubular, somewhat expanded above, 5-cleft. Anthers obtuse and entire at the base. Style-branches flattened, their appendages lanceolate. Achenes 8 -10-ribbed. Pappus a single row of scale-like bristles, shorter than the achene. [Greek, short-bristle, referring to the pappus.]
A monotypic genus of eastern North America.
Solidago sphacelata Raf. Ann. Nat. 14. 1820. S. cordata Short, Trans. Journ. Med. 7: 599. 1834. Brachychaeta cordata T. & G. Fl. N. A. 2: 194. 1841. B. sphacela a Britton; Kearney, Bull. Torr. Club 20: 484. 1893.
Stem erect, pubescent, simple or branched above, 2°-4° high. Basal and lower leaves broadly ovate, cordate or truncate at the base, acute at the apex, pinnately veined, sharply serrate, 3'-6' long, the slender petioles 3'-9' long, stem leaves gradually smaller and shorter-petioled, the uppermost very small and sessile; heads about 2 1/2" high, racemose-secund or densely clustered on the short branches of the narrow elongated terminal thyrsus; bracts of the involucre oblong or linear-oblong, obtuse or acutish; rays and disk-flowers each about 5.