Helianthus nuttallii subsp. parishii
| Helianthus nuttallii subsp. parishii | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Helianthus |
| Species: | |
| Subspecies: | H. n. subsp. parishii
|
| Trinomial name | |
| Helianthus nuttallii subsp. parishii (A.Gray) Heiser
| |
Helianthus nuttallii subsp. parishii is a subspecies of the species Helianthus nuttallii in the genus Helianthus, family Asteraceae.[1][2] It is also known by the common names Los Angeles sunflower[1] and Parish's sunflower.[3] This subspecies has not been seen, in the wild or in cultivation, since 1937.[1]
Description
[edit]- Stems: Range from glabrous (smooth) to tomentose (furry).[1]
- Leaves: Leaf arrangement is alternate. Upper leaf surfaces are hairy and rough or tomentose, while the lower leaf surfaces are more or less finely tomentose.[1]
- Inflorescences: Variable number of flowers are borne in round or flat-topped clusters. Peduncles (flower stalks) and phyllaries (involucral bracts) are densely hairy. Flowers from August–October.[1]
- Fruits: Fruits measure 3-4mm in length, with a pappus scales 3-4mm, sometimes less.[1]
Habitat and distribution
[edit]Inhabits marshy areas less than 500m above sea level in central western and southwestern California.[1]
Etymology
[edit]Helianthus is derived from Greek, meaning 'sun-flower' ('heli' meaning 'sun', and 'anthus', as in 'anther', meaning 'flower'). As the large, yellow-gold heads of many species tend to follow the sun, the Italian-derived 'girare-sole', literally meaning 'turning sun', is also a cognate with 'Jerusalem', as in Jerusalem Artichoke.[4]
Nuttallii is named for Thomas Nuttall (1786-1859), a grower of American plants at Rainhill in Lancashire, though he lived in Long Preston in Yorkshire.[4]
Parishii is named for Samuel Bonsall Parish and William Fletcher Parish, California botanists.[5]
References
[edit]- ^ a b c d e f g h i j Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, editors. 2012. "The Jepson Manual: vascular plants of California", second edition. University of California press, Berkeley. ISBN 9780520253124. pp 344
- ^ "Helianthus nuttallii subsp. Parishii (A.Gray) Heiser — the Plant List".
- ^ NRCS. "Helianthus nuttallii subsp. parishii". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 14 January 2017.
- ^ a b Gledhill, David (2008). "The Names of Plants". Cambridge University Press. ISBN 9780521866453 (hardback), ISBN 9780521685535 (paperback). pp 194, 275, 291
- ^ A. Gray. Contributions to North American Botany. (1883) Proceedings of the American Academy of Arts and Sciences. volume 19. [1]