This section is from the book "The Botanical Magazine; Or, Flower-Garden Displayed", by William Curtis. Also available from Amazon: The Botanical Magazine; or, Flower-Garden Displayed, Volume I.
Helianthus Multiflorus. Many-Flowered Or Perennial Sun-Flower
Syngenesia Polygamia Frustranea.
Recept. paleaceum, planum. Pappus 2-phyllus. Cal. imbricatus, subsquarrosus.
HELIANTHUS multiflorus foliis inferioribus cordatis trinervatis superioribus ovatis. Linn. Syst. Vegetab. ed. 14. Murr. p. 781.
CHRYSANTHEMUM americanum majus perenne, floris folis foliis et floribus. Moris. Hist. 3. p. 23.
The Helianthus multiflorus, a native of North-America, is a hardy perennial herbaceous plant, arising usually to the height of five or six feet, and producing a great number of large yellow shewy blossoms, which renders it a suitable plant to ornament the shrubbery or garden of large extent; the variety with double flowers is the one most commonly cultivated, and this we find in almost every garden: it flowers from July to September, and is propagated by parting its roots in autumn.
This is a hardy plant, of ready growth, will bear the smoke of London better than many others; if it continues in the same spot for a great number of years, the blossoms are apt to become single.
The single sort, according to Morison, was introduced before 1699 by Lord Lemster. Ait. Kew.