Grindelia howellii
Grindelia howellii, Howell's gumweed,[1] is a North American species of flowering plants in the daisy family. It is native to the northwestern United States, in the States of Idaho and Montana.[2]
| Grindelia howelli | |
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| Species: | G. howellii |
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| Grindelia howellii Steyerm. 1934 | |
Grindelia howellii grows in open, sunny sites on rocky slopes and in alluvial deposits. It is a perennial herb sometimes as much as 150 cm (5 feet) tall. The plant usually produces numerous flower heads in crowded, flat-topped arrays. Each head has 18-25 ray flowers, surrounding a large number of tiny disc flowers.[2][3][4]
References
- "Grindelia howellii". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 18 July 2015.
- Flora of North America, Grindelia howellii Steyermark, 1930
- Steyermark, Julian Alfred. 1934. Annals of the Missouri Botanical Garden 21(3): 549-550 diagnosis in Latin, description and commentary in English)
- Steyermark, Julian Alfred. 1934. Annals of the Missouri Botanical Garden 21(3): 540 line drawing of Grindelia howellii (figure 30 in center)
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