$modus 0: smartphone
$modus 1: smartphone
Helenium tenuifolium
Helenium tenuifolium Nutt. [Accepted]
Compositae
2 499987 Helenium tenuifolium Nutt.
W. Curtis, Bot. Mag., vol. 126 [ser. 3, vol. 56]: t. 7721 (1900) [M. Smith]
2 499987 Helenium tenuifolium Nutt.
T. Meehan, Native Fl. Ferns U.S., vol. 2 : p. 37, t. 10 (1878-1879)