Encelia resinifera
Encelia resinifera, the sticky brittlebush, is a North American species of flowering plant in the family Asteraceae.
Encelia resinifera | |
---|---|
![]() | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Asterales |
Family: | Asteraceae |
Genus: | Encelia |
Species: | E. resinifera |
Binomial name | |
Encelia resinifera C.Clark | |
Synonyms[1] | |
|
Distribution
The species is found at elevations between 1,100–1,700 metres (3,600–5,600 ft) in the states of Arizona and Utah, in the Southwestern United States.[2] It grows in soils derived from sandstone.[3]
Description
Encelia resinifera is a shrub ranging in height from 40–150 centimetres (1.3–4.9 ft). The trunk, which becomes fissured with age, supports slender stems.[3]
The leaves, which range between 10 and 25 mm in length, are ovate or lanceolate and are usually pointed at the tips.[3]
The yellow flowerheads are borne singly, appearing between May and July (late fall to mid-summer) in their native range. These have 8-13 ray florets.[3]
Subspecies
Two subspecies have been identified:
- Encelia resinifera subsp. resinifera — button brittlebush.[4]
- Encelia resinifera subsp. tenuifolia C.Clark — found in the Grand Canyon area. It has both leaves and ray laminae with a length that is more than three times their width.[3]
Taxonomy
Encelia resinifera was originally described as a variety of Encelia frutescens (Encelia frutescens var. resinosa) by M.E.Jones in 1913.[5] In 1998 it was reclassified as a distinct species by Curtis Clark.[3][6]
References
- Tropicos, Encelia resinifera C. Clark
- Biota of North America Program 2014 county distribution map
- "Encelia resinifera C. Clark". Flora of North America. efloras.org. Retrieved 2008-01-18.
- "Encelia resinifera C. Clark". PLANTS database. United States Department of Agriculture. Retrieved 2008-01-18.
- Jones, Marcus Eugene ex Blake, Sydney Fay 1913. Proceedings of the American Academy of Arts and Sciences 49(6): 364 description in Latin, specimen listing in English
- Clark, Curtis. 1998. Aliso 17(2): 201