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{{Short description|Species of flowering plant}}
{{Speciesbox
|image = Heleniumpuberulum.jpg
|genus = Helenium
|species = puberulum
|authority = [[A. P. de Candolle|DC.]] 1836
|synonyms_ref = <ref>[http://www.theplantlist.org/tpl1.1/record/gcc-91129 The Plant List, ''Helenium puberulum'' DC. ]</ref>
|synonyms = *''Cephalophora decurrens'' <small>Less.</small>
*''Helenium decurrens'' <small>(Less.) Vatke</small>
}}

'''''Helenium puberulum''''' is a North American species of flowering plants in the [[Asteraceae|daisy family]] known by the common name '''rosilla'''.<ref name=rr/> It is native to [[California]] and [[Baja California]], where it can be found in moist habitats such as riverbanks and meadows. It has also been found in [[Oregon]], although these might possibly be naturalized populations.<ref>[http://bonap.net/MapGallery/County/Helenium%20puberulum.png Biota of North America Program 2014 county distribution map]</ref><ref>[http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=4031 Calflora taxon report, University of California, ''Helenium puberulum'' DC. Sneezeweed, rosilla ]</ref>

''Helenium puberulum'' is an annual or perennial herb sometimes as much as 160 cm tall though other times much smaller. Most of the leaves are on the lower part of the plant. Stems are winged, meaning that they have flaps of tissue running down the sides. One plant can produce as many as 30 flower heads in a branched array. The head is unusual in that the part covered by the disc florets is almost completely spherical rather than conical as in most other species of the genus. There can sometimes be over 1000 small [[disc floret]]s in the head, each yellow at the bottom but brown or purple toward the tip. The 13-17 yellow [[ray florets]] are small and inconspicuous, pointing backwards down the flower stalk. Sometimes the ray florets are completely absent. The fruit is a hairy [[achene]] one to two millimeters long.<ref name=rr>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066857 Flora of North America, ''Helenium puberulum'' de Candolle 1836. Rosilla ]</ref>

==References==
{{Reflist}}

==External links==
*[http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=3223 Jepson Manual Treatment: ''Helenium puberulum'']
*[https://plants.usda.gov/java/profile?symbol=HEPU2 United States department of Agriculture Plants Profile]
*[http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Helenium+puberulum ''Helenium puberulum'' Calphotos Photo gallery, University of California]
*[https://sbwildflowers.wordpress.com/wildflowers/asteraceae/helenium/helenium-puberulum/ Wildflowers in Santa Barbara]
{{Commons category-inline|Helenium puberulum|position=right}}

{{Taxonbar|from=Q5703947}}

[[Category:Helenium|puber]]
[[Category:Flora of California]]
[[Category:Flora of Oregon]]
[[Category:Flora of Baja California]]
[[Category:Plants described in 1836]]
[[Category:Flora without expected TNC conservation status]]

{{asteroideae-stub}}

Helenium puberulum - Revision history

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