Grindelia havardii
| Grindelia havardii | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Grindelia |
| Species: | G. havardii
|
| Binomial name | |
| Grindelia havardii Steyerm. 1934
| |
Grindelia havardii, or Havard's gumweed,[1] is a North American species of flowering plants in the family Asteraceae. It is native to the south-central United States, in the states of Texas and New Mexico.[2][3]
Grindelia havardii 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.[4][5]
References
[edit]- ^ NRCS. "Grindelia havardii". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 18 July 2015.
- ^ Biota of North America Program 2014 county distribution map
- ^ Nesom, G.L. 1990. Studies in the systematics of Mexican and Texan Grindelia (Asteraceae: Astereae. Phytologia 68(4): 303–332 distribution map on page 308
- ^ Flora of North America, Grindelia havardii Steyermark, 1934
- ^ Steyermark, Julian Alfred. 1934. Annals of the Missouri Botanical Garden 21(3): 474–476 diagnosis in Latin, description and commentary in English, line drawing on page 476 (figure 11 at left)
External links
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