Helianthus ×laetiflorus Pers.
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Helianthus ×laetiflorus Pers.
Helianthus ×laetiflorus Pers.
Nomenclature
Pers.
Pers.
ICN
species
Helianthus ×laetiflorus
Classification
Vernacular names
Descriptions
Helianthus ×laetiflorus Pers.
c. 1.5 m tall, dying back in winter. Lower and mid cauline lvs hispidulous, shortly petiolate or apetiolate, narrow-ovate to narrowly ovate-elliptic, acute to acuminate, long-cuneate at base, serrate, (4)-8-25 cm long; upper cauline lvs similar to lower but uppermost sometimes alternate, smaller, narrower and apetiolate. Capitula 5-10 cm diam., in loose corymbs of 1-7. Involucral bracts in 2-3 rows, ciliate, otherwise glabrous or sparsely hairy, ovate-triangular or outermost lanceolate, acute to acuminate, 6-12 × 2-4-(5) mm. Receptacle convex; scales membranous, the larger with darker ciliate apices. Ray florets c. 20-30; disc florets numerous, usually yellow, sometimes reddish brown. Achenes not seen.
Taxonomic concepts
Helianthus ×laetiflorus Pers.
Helianthus ×laetiflorus Pers.
Helianthus ×laetiflorus Pers.
Helianthus ×laetiflorus Pers.
Helianthus ×laetiflorus Pers.
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Metadata
1f0c5afb-eef1-48b3-910b-75781fbe35f6
scientific name
Names_Plants
1 January 2000
27 June 2022