Helianthus annuus 'Mammoth'

helianthus annuus helianthus sp wild sunflower helianthus annuus medicinal plant autumn sun helianthus sunflower helianthus sp immortal asteraceae annual plant wild sunflowers helianthus annuus medicinal plants medicinal herb medicinal herbs therapeutic plant therapeutic plants therapeutic herb therapeutic spices officinal plant officinal plants officinal herb officinal spices fall season sunflowers helianthus sp immortals asteraceae annual plants helianthus helianthus sp compositae / sunflowers asterales order dicotyledon flowering plant spermatophyte flora plant use agronomy natural resources use temperate season seasons atmosphere space compositae / asteraceae asterales dicotyledoneae angiospermae spermatophyta / phanerogamae tracheophyta embryophyta chlorobionta archaeplastida eukaryota growing cycle species particularity species