Helenium species

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Scientific Name Helenium amarum var. amarum USDA PLANTS Symbol
HEAMA
Common Name Yellow Sneezeweed, Bitterweed ITIS Taxonomic Serial No.
528345
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Sandy or loamy soils; found in open, disturbed areas, roadsides, and (overgrazed) pastures and fields in generally the eastern two-thirds of Texas and southeastern states.
Plant: Upright annual 4 to 20 inches tall; stems are striated or ribbed with many branches in upper portion.
Leaves: Numerous alternate, very narrow, linear leaves 1-1/2 to 3 inches long. Lower leaves pinnately-lobed and withered by blooming time.
Inflorescence: Composite flower heads about 1+ inch across, yellow rays 3-toothed at tips, yellow 5-lobed disk flowers.
Bloom Period: Spring and summer, rarely in the fall.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of Texas" by Geyata Ajilvsgi, Illinois Wildflowers and Flora of North America
Texas Status
Native
Scientific Name Helenium amarum var. badium USDA PLANTS Symbol
HEAMB2
Common Name Yellow Sneezeweed, Bitterweed ITIS Taxonomic Serial No.
528346
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Calcareous soils; found in open, disturbed areas, roadsides, and (overgrazed) pastures and fields in generally the western third and plains of Texas and Oklahoma.
Plant: Upright annual 4 to 20 inches tall; stems are striated or ribbed with many branches in upper portion.
Leaves: Numerous alternate, very narrow, linear leaves 1-1/2 to 3 inches long. Lower leaves pinnately-lobed and withered by blooming time.
Inflorescence: Composite flower heads about 1+ inch across, yellow rays 3-toothed at tips, dark brown/purplish 5-lobed disk flowers.
Bloom Period: Spring and summer, rarely in the fall.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, and Flora of North America.
Texas Status
Native
Scientific Name Helenium elegans USDA PLANTS Symbol
HEEL
Common Name Pretty Sneezeweed ITIS Taxonomic Serial No.
36015
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Found in relatively moist areas along streams, pond banks, washes.
Plant: Erect, branched, tall annual, 3 to 4 ft high with smooth winged stems.
Leaves: Alternate, lower and mid blades lanceolate to narrowly elliptic with smooth, toothed or lobed edges; upper blades lanceolate to linear with entire edges. Lower leaves wither bu blooming time.
Inflorescence: Panicles of many (20 to 200+) composite flower heads per plant, each about 1-1/2 inches across; 10 to 17 yellow rays 1/4 to 5/8-inch long often dark reddish-brown at bases; large, protruding ball-shaped central disk with 100 to 700+ florets, yellow near base becoming dark brown above; hairy phyllaries.
Bloom Period: Spring to fall.
References: H. quadridentalum in "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of Texas" by Michael Eason, and Flora of North America.
Texas Status
Native

© Tom Lebsack 2019