sneezeweeds

genus Helenium

Member of sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

There are no other wild species of this genus in the bay area.

Key features:

stem winged or not
length of rays

rosilla
Helenium puberulum

rosilla
Helenium puberulum

stem winged by decurrent leaf bases
300–500 disk flowers, 1.9–2.7 mm
13–15 rays (ocassionally 0), 3.8–10 mm
very common

Per Merriam-Webster, the name is pronounced in an English way, “rozilla” or “rosilla”, or in a Spanish way, “roseeya”.

bigelow’s sneezeweed
Helenium bigelovii

bigelow’s sneezeweed
Helenium bigelovii

stem winged by decurrent leaf bases
250–500 disk flowers, 3–4.4 mm
14–20 rays, 13–25 mm
rare

2 observed taxons / 1 key

Chris’s observations: 23 (21 are research grade)

Locations:

El Corte de Madera OSP: 3
Sweeney Ridge National Recreation Area: 3
Mt. Madonna SP: 2
San Bruno Mountain State & County Park: 2
San Pedro Valley CP: 2
Sibley Volcanic RP: 2
Yosemite NP: 2
Ansel Adams Wilderness
Coal Creek OSP
Golden Gate National Recreation Area
Mt. Diablo SP
Murray Ranch SP
Sam McDonald CP
Thornewood OSP

Months:

Jun.: 2
Jul.: 8
Aug.: 6
Sep.: 4
Oct.: 1
Nov.: 2

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora