Roldana petasitis

Description

It is an evergreen subshrub that thrives in constant heat and prefers sheltered gardens. Growing up to 1.8 m tall, it features weak stems, large softly hairy, venated, palmate leaves that are 20 cm long and wide at most, with seven or more broad, blunt lobes.

Inflorescences

The 8 to 10 mm long, yellow flowerheads, like daisies, of about 6 ray ligulate petals are borne in foliaceous panicles. The plant blooms from winter to early spring.

Varieties

'Roldana p. var. cristobalensis' is a variety of this plant which features leaves with purple undersides. 'Roldana petasitis var. oaxacana' and 'sartorii' are other varieties.

Distribution

The plant is native to the subtropical highlands (Sierra Madre del Sur) of Oaxaca in Mexico, south to the tropics in El Salvador, Guatemala and Nicaragua.

Climatically, it is found in the tropical savanna climates grading into the drier semi-arid or temperate wet/dry areas, where it is present from Veracruz in the north to Nicaragua in the south, in both pine-oak and mountain cloud forests between 1,000m and 2,500m. The 'cristobalensis' variety is found in Chiapas, the southernmost Mexican state, and in Guatemala between elevations 1,000m and 1,600m. It is naturalized in parts of southeastern Australia and New Zealand.

:Neotropic ::Mexico Southwest: Colima, Guerrero, Jalisco, Michoacán, Nayarit, Oaxaca ::Mesoamerica: El Salvador, Guatemala, Honduras, Nicaragua

Gallery

Roldana petasitis 2023-02-24 05.jpg|Bunch of flowers Roldana petasitis Artarmon 001.jpg|Bushy habit Roldana petasitis kz01.jpg|Leaves Roldana petasitis kz5.jpg|Sprawling habit Roldana petasitis 2023-02-24 11.jpg|Pollination Jardim Jose do Canto (14008829034).jpg|In a forest 210205 146 San Diego Botanic Gdn - Roldana petasitis Velvet Groundsel.jpg|In San Diego Botanic Garden Senecio petasitis.jpg|Leaves with purple shades

References

References

1. {{GRIN
2. [https://www.bhg.com/gardening/plant-dictionary/shrub/velvet-groundsel/ Velvet Groundsel] [[Better Homes and Gardens (magazine). Better Homes & Gardens]]. Retrieved 28 March 2023.
3. [https://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Roldana~petasitis#:~:text=Leaves%20with%20lamina%20%C2%B1%20circular,except%20on%20leaves%20near%20heads. Roldana petasitis (Sims) H.Rob. & Brettell] PlantNET. Retrieved 22 August 2023.
4. [https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77095585-1 Roldana petasitis var. cristobalensis (Greenm.) Funston]Board of Trustees of the Royal Botanic Gardens, Kew Retrieved 12 April 2023.
5. [https://www.specialplants.net/shop/seeds/senecio_cristobalensis/ Senecio cristobalensis syn. Roldana petasitis var. cristobalensis] Special Plants.net by Derry Watkins. Retrieved 12 April 2023.
6. [https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77095586-1 Roldana petasitis var. oaxacana (Hemsl.) Funston] Board of Trustees of the Royal Botanic Gardens, Kew Retrieved 12 April 2023.
7. [https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77095587-1 Roldana petasitis var. sartorii (Sch.Bip. ex Hemsl.) Funston] Board of Trustees of the Royal Botanic Gardens, Kew Retrieved 12 April 2023.
8. [https://www.stevenfoster.com/photography/imageviewss/senecio/petasitis/sp2_033011/content/Senecio_petasitis_80098_large.html Steven Foster's Images of Senecio petasitis, Roldana petasitis, Velvet Grounsel, California geranium] Steven Foster Photography
9. [https://www.researchgate.net/publication/232685436_Taxonomic_Revision_of_Roldana_Asteraceae_Senecioneae_a_Genus_of_the_Southwestern_USA_Mexico_and_Central_America1 Taxonomic Revision of Roldana (Asteraceae: Senecioneae), a Genus of the Southwestern U.S.A., Mexico, and Central America1] Annals of the Missouri Botanical Garden by A. Michele Funston. January 2009. Retrieved 25 July 2023.
10. [https://gardenriots.com/2019/01/08/roldana-cristobalensis-formerly-senecio-cristobalensis-now-roldana-petasitis-var-cristobalensis/comment-page-1/ Roldana cristobalensis (formerly Senecio cristobalensis…now, Roldana petasitis var. cristobalensis)] GardenRiots Horticultural Forays Into a Changing Urban World
11. [https://keyserver.lucidcentral.org/weeds/data/media/Html/roldana_petasitis.htm Roldana petasitis (Sims) H. Rob. & Brettell] Environmental Weeds of Australia.