Ambrosia psilostachya
western ragweed
As recorded: Ambrosia psilostachya DC.
Plantae › Tracheophyta › Magnoliopsida › Asterales › Asteraceae
- Collected by
- Warneck, B.H.
- Collector number
- 21637
- Date
- September 14, 1944
- Locality
- Travis County, about Austin
- Region
- Texas, United States
- Record type
- Preserved specimen
Ambrosia psilostachya observed alive
This specimen was collected in 1944. Since 2000, iNaturalist observers have recorded 13,944 research-grade sightings in the wild, most recently on 2026-10-27.
2026-10-27
Garden Valley Pkwy, Waxahachie, TX, US
(c) Sam Kieschnick, some rights reserved (CC BY)
2026-10-27
Oakoasis Cnty Preserve, 12620 Wildcat Canyon Rd, Lakeside, CA 92040, USA
no rights reserved
2026-10-26
W Windsor Dr, Denton, TX, US
(c) gracedwelle, some rights reserved (CC BY-NC)
2026-10-26
Harold Ct, Austin, TX, US
(c) Harrison, some rights reserved (CC BY-NC)
2026-10-26
Tandy Hills Natural Area, Fort Worth, TX, US
(c) Sam Kieschnick, some rights reserved (CC BY)
2026-10-26
San Diego County, CA, USA
(c) Fred Melgert / Carla Hoegen, some rights reserved (CC BY-NC)
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Ambrosia psilostachya. BISH 11500. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956698513. Accessed via explore.bishopmuseum.org/specimens/bish/11500.
Record sources
- GBIF occurrence 5956698513 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026