Machaeranthera pinnatifida (Hook.) Shinners
Lacy Tansyaster, Yellow Spiny Daisy
Asteraceae (Aster Family)
Synonym(s): Xanthisma spinulosum
USDA Symbol: MAPI
The classification of this species, once known as Haplopappus spinulosus, has perplexed botanists; Haplopappus in the strictest sense is a southern South American genus. North American plants related to Yellow Spiny Daisy may be better placed in Machaeranthera. The very similar but annual species M. gracilis, also called Yellow Spiny Daisy, has the lowest chromosome number known in plants, with only four chromosomes in each cell; most plants have 14-30.
From the Image Gallery
Bloom InformationBloom Time: Aug , Sep , Oct
DistributionUSA: AR , AZ , CA , CO , IA , ID , KS , MN , MT , ND , NE , NM , NV , OK , SD , TX , UT , WY
Canada: AB , MB , SK
Native Distribution: Alberta south through Rocky Mountain region and much of the Plains states to New Mexico, Arizona, southern California, and northern Mexico.
Native Habitat: Open places in arid grasslands and deserts and among piņon and juniper.
National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Sibley Nature Center - Midland, TX
Additional resourcesUSDA: Find Machaeranthera pinnatifida in USDA Plants
FNA: Find Machaeranthera pinnatifida in the Flora of North America (if available)
Google: Search Google for Machaeranthera pinnatifida
MetadataRecord Modified: 2014-09-23
Research By: TWC Staff