Welcome to our Plant Photo Gallery and Database. Explore, discover and learn from a collection of regularly updated descriptions, photographs and herbarium vouchers (pressed images) of diverse flora found at the two Santa Fe Botanical Garden sites.

Need help? Please use our Contact form. For more information on image use policy >

Hymenopappus filifolius
threadleaf woollywhite, white ragweed
Asteraceae - Aster
Leonora Curtin Wetland Preserve, Museum Hill
  • Janice Tucker
  • Janice Tucker
  • Janice Tucker
  • Helen Woody

View full size photographer: Janice Tucker
Flower, stems, leaves

Description
This perennial is a native of western North America. The stems and leaves are densely coated with short, matted, woolly, white hairs. Under the coat of white wool are dark green stems. The leaves are alternate, threadlike and clustered at the base. The leaves resemble fern. This plant is usually found growing in rocky or sandy areas.
Mature Size
Up to 16 inches
Flower Color
Yellow, White
Bloom
In late spring and summer, yellow or sometimes white, disk flowers appear. There are no ray flowers. The flower heads are in open clusters. Parchment-like bracts surround these flower heads. The stigmas protrude noticeably from the tips of the corollas.
Interesting Facts
There are many species of Hymenopappus. H. filifolius is easily confused with the other species. In Latin, the word filifolius means with thread-like leaves. It is called White ragweed because of its white hairs and the tattered appearance of the leaves.
Traditional and Medicinal Uses
The Zuni people chewed the roots of Hymenopappus filifolius like chewing gum.
Santa Fe Botanical Garden Sites
Leonora Curtin Wetland Preserve, Museum Hill