Ambrosia psilostachya

Family (Traditional)Asteraceae
SpeciesAmbrosia psilostachya DC.
Common NameCuman Ragweed
Growth Habitforb
Plant NotesLeaf Persistance: Deciduous; Habit: forb; Woody/Herbaceous: herbaceous; Terrestrial/Aquatic: Terrestrial;
Leaf Arrangement: Opposite; Alternate; Simple/Compound: Simple;
Hypanthium: No; Perianth Absent: No; Fruit Color: ;
*Average C-Value: 0.9
C value 6
StatusNative; AGCP (FAC), EMP (FAC) (NWPL); TN[SNR] (State Rank); G5 (Global Rank)
Specimen(s) View and Download Specimen Details »

** Not applicable or data not available.

Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

  • State Boundaries
  • Counties
  • Counties - Species Present
  • Southeastern Plains
    • Blackland Prarie
  • Blue Ridge Mountains
  • Ridge and Valley
  • Cumberland Plateau
  • Cumberland Mountains
  • Allegheny Plateau
  • Interior Plateau
    • Bluegrass Region
    • Nashville Basin
    • Pennyroyal Karst Plain
    • Western Highland Rim
    • Eastern Highland Rim


SynonymFull Citation
Ambrosia californica Ambrosia californica Rydb.
Ambrosia coronopifolia Ambrosia coronopifolia Torr. & A. Gray
Ambrosia cumanensis Ambrosia cumanensis auct. non Kunth
Ambrosia psilostachya var. californica Ambrosia psilostachya var. californica (Rydb.) Blake
Ambrosia psilostachya var. coronopifolia Ambrosia psilostachya var. coronopifolia (Torr. & A. Gray) Farw.
Ambrosia psilostachya var. lindheimeriana Ambrosia psilostachya var. lindheimeriana (Scheele) Blank.
Ambrosia psilostachya var. psilostachya Ambrosia psilostachya var. psilostachya
Ambrosia rugelii Ambrosia rugelii Rydb.
Franseria psilostachya Franseria psilostachya DC.

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort.

Counties included on distribution map: Hamilton (TN)

Herbaria represented by specimen data listed below: UCHT

Range of years during which specimens were collected: -

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
UCHT029003 Hamilton Tennessee
Ambrosia psilostachya
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Plant Photos

Ambrosia psilostachya - Milo Pyne
Ambrosia psilostachya - Milo Pyne