UW Burke Herbarium species comparison

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Helianthus tuberosus

Helianthus neglectus

Jerusalem artichoke
Habit Perennial with tuber-bearing rhizomes, the stem stout, pubescent, 0.7-5 m. tall.
Leaves

Leaves opposite below and alternate above, broadly lanceolate to ovate, acuminate, 10-25 cm. long and 4-12 cm. wide, with winged petioles 2-8 cm. long, the blades serrate, scabrous above.

Flowers

Heads usually numerous, the disk 1.5-2.5 cm. wide, the receptacle chaffy;

involucre bracts dark, narrowly lanceolate, acuminate, exceeding the disk, scabrous on the back;

disk flowers yellow, perfect;

ray flowers 10-20, yellow, neutral, 2-4 cm. long;

pappus of 2 deciduous awns.

Fruits

Achenes thick, compressed.

Helianthus tuberosus

Helianthus neglectus
Flowering time August-October
Habitat Roadsides, fields, ditches, wastelots, and other disturbed areas, where escaping from cultivation.
Distribution
Occurring in scattered locations chiefly east of the Cascades crest in Washington; .Washington, east to the Rocky Mountains, native from the Great Plains to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Origin Introduced from central and eastern North America
Conservation status Not of concern
Sibling taxa
H. annuus, H. ciliaris, H. cusickii, H. nuttallii, H. petiolaris
H. annuus, H. ciliaris, H. cusickii, H. nuttallii, H. petiolaris, H. tuberosus
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in UW Burke Herbarium yet, or it's listed under a synonym.)

Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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