Helianthus pumilus
| Helianthus pumilus | |
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H. pumilus
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| Helianthus pumilus Nutt. 1841
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Helianthus pumilus is a North American species of sunflower known by the common name little sunflower[1] or bush sunflower.[2] It is found in the western United States, primarily the Rocky Mountain region of Montana, Wyoming, and Colorado, with a few isolated populations in Utah and Idaho.[3]
Helianthus pumilus grows on dry rocky soil in the mountains and nearby plains. It is an perennial herb up to 100 cm (40 inches) tall. One plant usually produces 1-6 flower heads, each containing 8-13 yellow ray florets surrounding 30 or more yellow or brown disc florets.[1][4]
References
- ↑ 1.0 1.1 Flora of North America, Helianthus pumilus Nuttall, 1841. Little sunflower
- ↑ United States Department of the Interior, National Park Service, Rocky Mountain National Park, Bush Sunflower helianthus pumilus
- ↑ Biota of North America Program 2014 county distribution map
- ↑ Nuttall, Thomas 1841. Transactions of the American Philosophical Society, new series 7: 366–367
External links
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