
1) Common sunflower 2) Helianthus 3) Helianthus annuus 4) Sunflower
Found on
https://www.crosswordclues.com/clue/mirasol

(Helianthus) These are hardy herbaceous perennials or annuals found wild in North America. They produce large yellow flowers in late summer and autumn. The perennial kinds are tall and vigorous. H. decapetalus multiflorus and its double variety, Soliel d'Or, grow 4 to 5 feet high. The prettiest one is called Monarch; it is a variety of H. atroruben...
Found on
http://www.encyclo.co.uk/local/10004
No exact match found.