Rytidosperma caespitosum

Rytidosperma caespitosum_Keir Morse
Photo: Keir Morse

Common names: wallabygrass

Rytidosperma caespitosum (wallabygrass) is a perennial grass (family Poaceae) that can grow to be more than 2 feet tall and is found in the central and south coast ranges of California. It is native to Australia. It favors grasslands and dunes. It spreads via seed, often along roadsides. Its seeds are bristly and get carried by the wind. Humans and machinery also disperse the seeds.

Cal-IPC Rating: Watch

CDFA Rating: None?


Plant Risk Assessment - An evaluation of the potential for a plant to be invasive in California.

Species ID Card

Invasive Species ID Card - To support field identification of early detection species, Cal-IPC has designed a set of Species ID cards that can be downloaded, printed double-sided, and trimmed to size.

Weed Management Notes

No Weed RIC Management Notes are available for this species. Check for information on other species in the genus on the Weed RIC site.

Cal-IPC Newsletter Articles

There are no newsletter articles associated with this species yet.

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

Other Rytidosperma caespitosum Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Rytidosperma caespitosum_inflorescence (seed release)_KeirMorse
    Rytidosperma caespitosum (wallabygrass) inflorescence (seed release). Photo: Keir Morse
    Rytidosperma caespitosum_leaf blade and sheath_copyright2008_NealKramer
    Rytidosperma caespitosum (wallabygrass) leaf blade and sheath. Photo: &#169 2008 Neal Kramer
    Rytidosperma caespitosum (wallabygrass) seed (caryopsis) with appendages. Photo: Keir Morse
    Rytidosperma caespitosum_leaves_KeirMorse
    Rytidosperma caespitosum (wallabygrass) leaves. Photo: Keir Morse
    Rytidosperma caespitosum_growth habit_KeirMorse
    Rytidosperma caespitosum (wallabygrass) growth habit. Photo: Keir Morse