Jepson eFlora
Key to families | Table of families and genera

Key to Helenium

View taxon page for Helenium

1. Stem not winged; cauline leaves generally narrowly linear; annual ..... H. amarum var. amarum

1' Stem winged by decurrent leaf bases; cauline leaves generally wider; annual or perennial herb

2. Cauline leaf margin ± toothed ..... H. autumnale

2' Cauline leaf margin entire

3. Heads (1)4–20(30); ray corolla 3.8–10 mm (occasionally ray flowers 0); disk corolla generally 4-lobed, 1.6–2.7 mm; pappus scales 0.4–1 mm ..... H. puberulum

3' Heads 1–20; ray corolla 12–37 mm; disk corolla 5-lobed, 3–5.2 mm; pappus scales 1.3–4.5 mm

4. Peduncle sparsely to moderately hairy; pappus scales 1.3–2.2(2.7) mm; widespread but not North Coast ..... H. bigelovii

4' Peduncle generally densely hairy; pappus (2.5)3–4.5 mm; North Coast ..... H. bolanderi


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.