【向日葵属】
向日葵属植物包括52种以及许多亚种，全部都是起源于北美洲，但现在有许多种已经作为食物或花卉被引进到世界各地种植。
向日葵属植物的特点是具有小花聚合成盘状，周围呈放射性舌状花为中性不育花，内部盘花两性，有两个成熟后易脱落的，鳞片状冠毛；果实为瘦果。
向日葵属植物有一年生的也有多年生的，都是草本植物。
== 种 ==
* Helianthus agrestis : Southeastern Sunflower
* 狭叶向日葵 Helianthus angustifolius : Swamp Sunflower
* 向日葵 Helianthus annuus
* Helianthus anomalus : Western Sunflower
* 绢毛葵 Helianthus argophyllus  : Silverleaf Sunflower
* Helianthus arizonensis : Arizona Sunflower
* 黑紫向日葵 Helianthus atrorubens
* Helianthus bolanderi : Serpentine Sunflower
* Helianthus californicus : California Sunflower
* Helianthus carnosus : Lakeside Sunflower
* 蓝茎向日葵 Helianthus ciliaris
* Helianthus cinereus
* Helianthus couplandii : Prairie Sunflower
* Helianthus cusickii : Cusick's Sunflower
原野向日葵(Helianthus petiolaris)
* 小花葵 Helianthus debilis
** 瓜叶葵 Helianthus debilis ssp. cucumerifolius : Cucumberleaf Sunflower
** Helianthus debelis ssp. debilis : Beach Sunflower, Dune Sunflower
** Helianthus debilis ssp. silvestris : Cucumberleaf Sunflower
** Helianthus debilis ssp. tardiflorus : Cucumberleaf Sunflower
** Helianthus debilis ssp. vestitus : Cucumberleaf Sunflower
* 千瓣葵 Helianthus decapetalus : Thinleaf Sunflower
* Helianthus deserticola
* Helianthus divaricatus : Woodland Sunflower
* Helianthus eggertii : Eggert's Sunflower
* Helianthus floridanus : Florida Sunflower
* Helianthus giganteus
* Helianthus glaucophyllus : Whiteleaf Sunflower
* Helianthus gracilentus : Slender Sunflower
* Helianthus grosseserratus: Sawtooth Sunflower
* Helianthus heterophyllus : Variableleaf Sunflower
* Helianthus hirsutus
* Helianthus laciniatus : Alkali Sunflower
* 美丽向日葵 Helianthus laetiflorus
* Helianthus laevigatus : Smooth Sunflower
* Helianthus longifolius : Longleaf Sunflower
柳叶向日葵(Helianthus salicifolius)
* 糙叶向日葵 Helianthus maximiliani : Maximillian Sunflower
* Helianthus microcephalus : Small Woodland Sunflower
* 毛叶向日葵 Helianthus mollis : Downy Sunflower, Ashy Sunflower
* Helianthus multiflorus
* Helianthus neglectus : Neglected Sunflower
* Helianthus niveus
** Helianthus niveus ssp. canescens : Showy Sunflower
** Helianthus niveus ssp. tephrodes : Algodones Sunflower
* Helianthus nuttallii
** Helianthus nuttallii ssp. nuttallii : Nuttall's Sunflower
** Helianthus nuttallii ssp. parishii : Parish's Sunflower
** Helianthus nuttallii ssp. Rydbergii : Rydberg's Sunflower
* Helianthus occidentalis : Fewleaf Sunflower
** Helianthus occidentalis ssp. occidentalis : Fewleaf Sunflower
** Helianthus occidentalis ssp. plantagineus : Fewleaf Sunflower
* Helianthus paradoxus : Paradox Sunflower
* Helianthus pauciflorus
** Helianthus pauciflorus ssp. pauciflorus : Stiff Sunflower
** Helianthus pauciflorus ssp. subrhomboideus : Stiff Sunflower
* 原野向日葵Helianthus petiolaris
** Helianthus petiolaris ssp. fallax : Prairie Sunflower
** Helianthus petiolaris ssp. petiolaris : Prairie Sunflower
* Helianthus porteri : Porter's Sunflower
* Helianthus praecox
** Helianthus praecox ssp. hirtus : Texas Sunflower
** Helianthus praecox ssp. praecox  : Texas Sunflower
** Helianthus praecox ssp. runyonii : Runyon's Sunflower
菊芋，洋姜(Helianthus tuberosus)
* Helianthus praetermissus : New Mexico Sunflower
* Helianthus pumilus : Little Sunflower
* Helianthus radula : Rayless Sunflower
* Helianthus resinosus : Resindot Sunflower
* 柳叶向日葵 Helianthus salicifolius
* Helianthus schweinitzii : Schweinitz's Sunflower
*  Helianthus silphioides : Rosinweed Sunflower
* Helianthus simulans : Muck Sunflower
* Helianthus smithii : Smith's Sunflower
* Helianthus strumosus  : Paleleaf Woodland Sunflower
* 菊芋 Helianthus tuberosus