Helianthus x, Pers.
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https://doi.org/10.5281/zenodo.293764 |
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https://treatment.plazi.org/id/90236A28-9D85-F480-F903-F14E1785473E |
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Plazi |
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Helianthus x |
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3. H. x laetiflorus Pers. , Syn. Pl. 2: 476 (1807)
( H. rigidus x tuberosus ).
Like 2 but rhizomes not tuberous; leaves broadly lanceolate, conspicuously 3-veined below, very scabrid on both surfaces, the upper usually much smaller; capitula 6-10 cm in diameter; involucral bracts shorter than the diameter of the disc,
appressed, elliptical. Cultivated for ornament and naturalized in waste places. [Da Ga Ge Ho Hu Rs (C).] (North America.)
Some records may be referable to H. rigidus , from W. North America.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Helianthus x
| Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A. 1976 |
H. x laetiflorus
| Pers. 1807: 476 |