Isocoma tenuisecta, Burroweed
Scientific Name: Isocoma tenuisecta
Common Name: Burroweed
Also called: Burrow Goldenweed
Family: Asteraceae, Sunflower Family
Synonyms: (Haplopappus tenuisectus, Aplopappus tenuisectus)
Size: To 3 feet.
Growth Form: Forb/herb, subshrub; compact, multiple woody stems, vertical, small fine hairs.
Leaves: Green or grayish-green; glandula; alternate, deeply or pinnately divided in 4 or more linear lobes; dried older leaves persist at bloom.
Flower Color: Yellow; small, discoid flowers only; dense clusters on terminal tips of long stalks; old flowers turn brown and persist on plant; fruit an achene.
Flowering Season: August to October.
Elevation: 2,000 to 5,500 feet.
Habitat Preferences: Wide variety of habitats, lower and upper Sonoran deserts, sunny open areas, dry desert washes, mesas, roadsides and other disturbed areas.
Recorded Range: In the United States, only in AZ and NM; central and southern Arizona, southeastern and northwest New Mexico. Burroweed is also native to northwest Mexico.
U.S. Weed Information: No data available.
Invasive/Noxious Weed Information: No data available.
Wetland Indicator: No data available.
Threatened/Endangered Information: No data available.
Comments: Burroweed is common in Arizona and one of many yellow fall blooming subshrubs in the state originally belonging to the large genus Haplopappus. After more review species were moved to Isocoma, Ericameria and other genera.
Burroweed readily attracts insects and butterflies. It is poisonous to livestock including cattle and sheep and its presence is considered an indicator of overgrazed rangelands. It is similar in appearance to the closely related Aalkali Goldenbush, Isocoma acradenia whose leaves are linear and not pinnately divided.