Helianthus nuttallii subsp. nuttallii

Helianthus nuttallii subsp. nuttallii
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Helianthus
Species:	H. nuttallii Torr. & A.Gray
Subspecies:	H. n. subsp. nuttallii
Trinomial name
Helianthus nuttallii subsp. nuttallii

Helianthus nuttallii subsp. nuttallii, also known by the common name Nuttall's sunflower[1] is a subspecies of Helianthus nuttallii in the genus Helianthus in the family Asteraceae.[1] It is considered by The Plant List to be a synonym for H. nuttallii.[2] However, The Jepson Manual argues that it is distinct from the species.[1]

Description

• Stems: Range from glabrous (smooth) to scabrous (rough).[1]
• Leaves: Upper leaf surfaces are scabrous, while the undersides of the leaves are covered in short, rough hairs.[1]
• Inflorescences: Flowers from June–October.[1]
  • Peduncle: Glabrous.[1]
  • Involucral bracts: Smooth or covered with short, stiff, adpressed hairs.[1]

Habitat and distribution

Found in moist meadows, streams, and springs from 1200-1750m elevation. Occurs in California in the San Gabriel Mountains, San Bernardino Mountains, Great Basin province, western Mojave Desert, and parts of New Mexico. Populations exist as far north as British Columbia, stretching into eastern Canada.[1]

Etymology

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.[3]

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.[3]

References

1. 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
2. "Helianthus nuttallii subsp. Nuttallii — the Plant List".
3. Gledhill, David (2008). "The Names of Plants". Cambridge University Press. ISBN 9780521866453 (hardback), ISBN 9780521685535 (paperback). pp 194, 275