| Grindelia howellii | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Grindelia |
| Species: | G. howellii
|
| Binomial name | |
| Grindelia howellii Steyerm. 1934
| |
Grindelia howellii, or Howell's gumweed,[1] is a North American species of flowering plants in the family Asteraceae. It is native to the northwestern United States, in the States of Idaho and Montana.[2]
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[edit]
- ^ USDA, NRCS (n.d.). "Grindelia howellii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 18 July 2015.
- ^ a b 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)