Top
Header

(First upload on September 20 2009. Last on February 19 2024) [ 日本語 | English ]

Helianthus tuberosus L.






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Helianthus L.
[ H. laevigatus | H. tuberosus | H. annuus | H. cucumerifolius or debilis ] ☛ H. strumosus
Kiku-imo (キクイモ, 菊芋), Jerusalem artichoke
Buta-imo (ブタイモ)
Lifeform: perennial forb
Distribution: native to the North America (exotic to Japan)

Hokkaido Blue List: A3

Habitat: woodlands, cultivated fields, roadsides, etc.

HUSTEP: Plants and Plant communities in Japan (flora list)

Ligulate flower ≈ 10-20 with 3-5 lobed top ⇔ H. strumosus Chromosome number: 2n = 68 or 102
A couple of cultivars (e.g., boston red, dwarf sunray, fuseau, long red, and stampede)
  • Murai M & Yoshida S. 1998. Evidence for the cell wall involvement in temporal changes in freezing tolerance of Jerusalem Artichoke (Helianthus tuberosus L.) tubers during cold acclimation. Plant and Cell Physiology 39: 97-105
索引

Helianthus tuberosus in Hokkaido


ST1 ST2 ST3
ST4 ST5 ST6
[1] a clonal patch at a park, N28/E4, Sapporo City, on August 30 2009. [2] close-up of leaves at the edge of Keiteki-no-mori Forest (恵迪の森) in Hokkaido University campus on August 31 2009. I have never seen the flower in the city of Sapporo. That may suggest that this species is vegetatively reprodued only in the region. [3/4] at the campus of Hokkaido University of Education at Hakodate, southern Hokkaido, on September 26 2014. [5/6] near the intersection of the Shubuto River and the National Road Route 220, western Hokkaido, on October 12 2023.

Helianthus laevigatus Torr. et A. Gray


Yanagibahimawari (ヤナギバヒマワリ, 柳葉向日葵), smooth sunflower

confusing with Helianthus salicifolius A. Dietr., because the common name is willowleaf sunflower

Lifeform: rhizomatous, perennial forb
Distribution: north America (east-central and southeastern United States from Georgia to Maryland)
Cultivars: golden pyramid, yellow submarine

ST1 ST2
[1/2] cv. golden pyramid in a large garden store, Sapporo, on November 4 2017.

Helianthus cucumerifolius or H. debilis


Himehimawari (ヒメヒマワリ, 姫向日葵)
Lifeform: annual forb
Origin: North America, cultivar of H. annuus
Habitat: escaped but not establsiihed
Chromosome number: 2n = 34
Synonyms:

Helianthus debilis Nutt., often used

ST1 ST2 ST3
[1-3] along Hokudai Street in front of Hokkaido University Hospital on September 12 2022.

Helianthus annuus L.


Himawari (ヒマワリ, 向日葵), sunflower
Lifeform: annual forb
Distribution: native to western North America
Habitat: escaped from gardening
Seed: utilized for food and oil
Cultivar: Tohoku Yae (東北八重): semi-dwarf and double-flowered

ST1 ST2 ST3
ST4
[1-3] close to a bridge on Sosei River at N10/E1, Sapporo. [1/2] a bumble bee on an inflorescence on August 22 2013. [3] on August 21 2013. [4] used for a growth experiment at the backyard of GSEES on June 13 2020.

Semi-dwarf, double-flowered cultivar (Tohoku-yae)

ST1 ST2 ST3
[1/2] under a street tree near Fuji Woman's University, Sapporo, on October 9 2018. [3] under a street tree in N18/W5, North Ward, Sapporo, on October 19 2022.

フッター