Tetraneuris species

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Scientific Name Tetraneuris acaulis var. acaulis (Hymenoxys acaulis) USDA PLANTS Symbol TEACA2
Common Name Stemless Four-nerve Daisy, Stemless Hymenoxys, Goldflower ITIS Taxonomic Serial No. 530623
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Plains to montane (3500 to 9500 ft.); dry soils in grasslands, roadsides, hillsides and other open areas.
Plant: Short perennial 4 to 8 inches tall; 1 to many unbranched, reddish-green, leafless stems (peduncles) with short hairs.
Leaves: Thick, hairy, basal, spatulate or oblanceolate to linear-oblanceolate, may be dotted with glands; 1 to 2 inches long.
Inflorescence: Composite flower heads less than 2 inches across borne singly atop peduncles 3 to 8 inches long; 8 to 15 yellow rays with three notches at tips; yellow centers with 25 to 200 disk florets; phyllaries usually densely woolly-hairy.
Bloom Period: May to July.
References: "Flora of Colorado" by Jennifer Ackerfield, Flora of North America, and American Southwest.
BONAP Distribution Map
Colorado Status:
Native
Scientific Name Tetraneuris acaulis var. caespitosa (Hymenoxys acaulis var. caespitosa) USDA PLANTS Symbol TEACC
Common Name Caespitose Four-nerve Daisy, Stemless Hymenoxys, Goldflower ITIS Taxonomic Serial No. 530625
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Subalpine and alpine (10000 to 14000 ft.); tundra, rocky, gravelly areas, alpine meadows above timberline.
Plant: Short perennial 1 to 3 inches tall; 1 to many unbranched, reddish-green, leafless stems (peduncles) with short hairs.
Leaves: Thick, hairy, basal, spatulate or oblanceolate to linear-oblanceolate, may be dotted with glands; 1 to 2 inches long.
Inflorescence: Composite flower heads less than 2 inches across borne singly atop short peduncles 1/4 to 3 inches; 8 to 15 yellow rays with three notches at tips; yellow centers with 25 to 200 disk florets; phyllaries usually densely woolly-hairy.
Bloom Period: June to August.
References: "Flora of Colorado" by Jennifer Ackerfield, Flora of North America, and American Southwest.
BONAP Distribution Map
Colorado Status:
Native
Scientific Name Tetraneuris ivesiana (Hymenoxys ivesiana) USDA PLANTS Symbol TEIV
Common Name Ives' Four-nerve Daisy, Perky Sue ITIS Taxonomic Serial No. 38512
Family Asteraceae (Sunflower) SEINet
Reference
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Description Life zones and habitat: Plains to montane (4900 to 9500 ft.); dry open areas, sagebrush meadows, conifer woodlands.
Plant: Short perennial 4 to 12 inches tall; somewhat branched from base, stems also may be branched.
Leaves: Basal and lower stem leaves linear-oblanceolate; mid-stem blades becoming linear; edges entire, surfaces smooth or sparsely to moderately-covered with downy hairs and usually densely gland-dotted; blades tightly clustered, especially basal, and 2 to 7-1/2 inches long.
Inflorescence: Composite flower heads with 7-10 yellow ray florets 3/8 to 3/4 inch long with two notches at tips; 80 to 150+ yellow disk florets; involucre with pointed, hairy, gland-dotted phyllaries; heads usually solitary on somewhat to densely hairy peduncles 2 to 8 inches long.
Bloom Period: May to August.
References: "Flora of Colorado" by Jennifer Ackerfield, American Southwest, SW Colorado Wildflowers and SEINet.
BONAP Distribution Map
Colorado Status:
Native
© Tom Lebsack 2021