Parthenium incanum Kunth
Asteraceae (Aster Family)
USDA Symbol: PAIN2
The deciduous shrub, mariola, is intricately branched from the base and reaches a height of 1-3 ft. Its branches and lobed leaves are cottony pubescent, lending and overall grayish-white appearance. Flat-topped flower heads, made up of many small, white flowers, terminate the main branches.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Retention: Deciduous
Size Notes: Up to about 3 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom InformationBloom Color: White
Bloom Time: May , Jun , Jul , Aug , Sep , Oct , Nov
Bloom Notes: Flowers resemble small cauliflowers.
DistributionUSA: AZ , NM , NV , TX , UT
Native Distribution: AZ & s.w. UT, to Trans-Pecos deserts & Edwards Plateau, s. to n. Mex.
Native Habitat: Desert grasslands; dry, gravelly slopes & plains
Growing ConditionsLight Requirement: Sun
Soil Moisture: Dry
Soil Description: Dry, caliche soils.
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Tohono Chul Park, Inc. - Tucson, AZ
BibliographyBibref 995 - Native Landscaping from El Paso to L.A. (2000) Wasowski, S. and A. Wasowski
Search More Titles in Bibliography
Web ReferenceWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Additional resourcesUSDA: Find Parthenium incanum in USDA Plants
FNA: Find Parthenium incanum in the Flora of North America (if available)
Google: Search Google for Parthenium incanum
MetadataRecord Modified: 2022-12-30
Research By: TWC Staff