Trichoptilium
{{Short description|Genus of flowering plants}}
{{Speciesbox
|image = Trichoptilium incisum 1.jpg
|status = G4
|status_system = TNC
|status_ref =
|display_parents = 4
|genus = Trichoptilium
|parent_authority = A. Gray
|species = incisum
|authority = A.Gray
}}
Trichoptilium is a monotypic genus in the daisy family containing the single species Trichoptilium incisum, which is known by the common names yellowdome{{PLANTS|id=TRIN2|taxon=Trichoptilium incisum|accessdate=14 December 2015}} and yellowhead.
Description
Trichoptilium incisum grows up to {{Convert|20|cm|frac=2}} tall.{{Cite book |last=Spellenberg |first=Richard |url=https://archive.org/details/nationalaudubons00spel/page/403/ |title=National Audubon Society Field Guide to North American Wildflowers: Western Region |publisher=Knopf |year=2001 |isbn=978-0-375-40233-3 |edition=rev |pages=404 |orig-date=1979}} It sends up stems from a basal rosette of sharply toothed leaves which are up to {{Convert|5|cm|abbr=on|frac=4}} long and covered in curly hairs and oil glands. Atop each stem is a rounded bright yellow flower head about {{Convert|1.5|cm|abbr=on|frac=4}} wide with only disc florets. Each head is a hemispherical button about 1 cm in diameter. The fruit is bristly with pappus.
Distribution and habitat
The plant is native to the Mojave and Sonoran Desert regions of the United States and Mexico.
It appears in late winter, and depending on rain, sometimes in autumn.
References
{{Reflist}}
External links
- {{Commons category-inline|Trichoptilium}}
- [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1944,1945 Jepson Manual Treatment - Trichoptilium incisum]
- [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Trichoptilium+incisum Trichoptilium incisum - Photo gallery]
{{Taxonbar|from1=Q16270575|from2=Q2709471}}
Category:Monotypic Asteraceae genera
Category:Flora of the California desert regions
Category:Flora of the Sonoran Deserts
Category:Natural history of the Mojave Desert
Category:Taxa named by Asa Gray
{{Helenieae-stub}}