Tetraneuris species

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Scientific Name Tetraneuris acaulis var. caespitosa (Hymenoxys acaulis) USDA PLANTS Symbol
TEACC
Common Name Stemless Four-nerve Daisy, Stemless Hymenoxys, Goldflower ITIS Taxonomic Serial No.
530625
Family Asteraceae (Sunflower) Flora of North America Reference
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Description Life zones and habitat: 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 peduncles; 8 to 15 yellow rays with three notches at tips; yellow centers with 25 to 200 disk florets; phyllaries usually densely hairy.
Bloom Period: June to August.
References: Flora of North America, and www.americansouthwest.net.
Note: The plants below appear to be var. caespitosa because of the county and altitude at which they are located (in Summit County at 12000 ft) and the hairiness of the leaves.
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.
530625
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, www.americansouthwest.net, www.swcoloradowildflowers.net and SEINet.
BONAP Distribution Map
Colorado Status:
Native
© Tom Lebsack 2019