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Lathyrus caudatus

Hedysarum sulphurescens

White sweetvetch

Heimia salicifolia

Shrubby yellowcrest

Helenium bigelovii

Bigelow's sneezeweed

Helenium pinnatifidum

Southeastern sneezeweed

Helianthella castanea

Diablo helianthella

Helianthemum salicifolium

Willowleaf frostweed

Helianthus angustifolius

Swamp sunflower

Helenium thurberi

Helianthella quinquenervis

Helianthella microcephala

Helianthella parryi

Linum gyaricum subsp. gyaricum

Helianthus annuus

Sunflower

Helianthus debilis

Beach sunflower

Helianthus hirsutus

Hairy sunflower

Helianthus maximiliani

Maximilian's sunflower

Helianthus occidentalis

Western sunflower

Helianthus salicifolius

Willow-leaf sunflower

Helianthus exilis