Zinnia grandiflora
(Rock Mountain Zinnia)
Zinnia grandiflora, Picture Canyon, Comanche National Grassland, Baca Co. 9823
Zinnia grandiflora, Lathrop State Park, Huerfano Co. 6775
Zinnia grandiflora, Lathrop State Park, Huerfano Co. 7511
Zinnia grandiflora, Picture Canyon, Comanche National Grassland, Baca Co. 9800
Zinnia grandiflora, Picture Canyon, Comanche National Grassland, Baca Co. 9812
| Scientific Name | Zinnia grandiflora | USDA PLANTS Symbol | ZIGR |
| Common Name | Rocky Mountain Zinnia, Plains Zinnia | ITIS Taxonomic Serial No. | 38715 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description | Life zones and habitat: Plains and foothills (3500 to 7000 ft.); dry, sometimes calcareous soils on plains, desert areas, slopes, flats and prairies. Plant: Low-growing upright rounded or flat-topped perennial, up to 9 inches tall; stems branched with rough, short hairs. Leaves: Linear, opposite, sessile blades crowded along the stems; 3/8 to 1-1/8 inches long and less than 1/8-inch wide; surfaces covered with short stiff hairs. Inflorescence: Showy yellow composite flower heads on the branch tips, 3 to 6 ovate to orbiculate rays and 18 to 24 red-orange disk florets; bell-shaped to cylindrical involucre with oblong, thin and papery phyllaries in 3 to 4 graduated series, straw colored to yellow, often with red-tinted tips. Bloom Period: June to October. References: "Flora of Colorado" by Jennifer Ackerfield, SEINet and "Wildflowers of Texas" by Geyata Ajilvsgi. |
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