Hymenoxys grandiflora
(Old Man of the Mountain)
Hymenoxys grandiflora, Upper Straight Creek Trail, Summit Co. 8224
Hymenoxys grandiflora, Blue Lakes, Summit Co. 1244
Hymenoxys grandiflora, Glacier Ridge, Summit Co. 2427
Hymenoxys grandiflora, Glacier Ridge, Summit Co. 6626
Hymenoxys grandiflora, Shrine Ridge, Eagle Co. 7013
Hymenoxys grandiflora, Glacier Ridge, Summit Co. 6624
Hymenoxys grandiflora, Upper Straight Creek Trail, Summit Co. 8229
Hymenoxys grandiflora, Upper Straight Creek Trail, Summit Co. 8231
| Scientific Name | Hymenoxys grandiflora (Tetraneuris grandiflora) | USDA PLANTS Symbol | HYGR |
| Common Name | Old Man of the Mountain | ITIS Taxonomic Serial No. | 514996 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description |
Life zones and habitat: Subalpine and alpine (10000 to 14000 ft.); rocky soils in open alpine meadows and hillsides. Plant: Erect perennial, one to several stems, 4 to 12 inches tall; hairy stems and leaves. Leaves: Basal leaves with simple or with 3 to 15 linear lobes, 7/8 to 2-3/4 inches long, hairy; stem leaves the same, but smaller and fewer lobes. Inflorescence: One to several heads per plant, borne singly on each stem; large composite heads, 2 to 3 inches in diameter; 15 to 25 yellow ray florets with 3 notches at the tips; domed center about 1 inch across with many (150 to 400), yellow-brown disk florets; involucres below are hemispherically-shaped with phyllaries that are in 2 or 3 layers, thin, linear-lanceolate and hairy. Bloom Period: June to August. References: "Flora of Colorado" by Jennifer Ackerfield, Flora of North America and Montana Field Guide. |
BONAP Distribution Map Map Color Key |
Colorado Status: Native |
© Tom Lebsack 2024
Banner photo: Castilleja rhexifolia and a brewing storm over the San Juan Mountains