Trianthema portulacastrum

Family (Traditional)Asteraceae
Species:Trianthema portulacastrum L.
Common NameDesert Horse Purslane; Desert Horsepurslane
Growth Habitforb
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: Yes; Woody Herbaceous: Herbaceous; Duration: Annual; Duration: Perennial; General Ecology: Terrestrial; Growth Habit: forb; Region of Origin: Pantropics; Reproductive Phenology: April; Reproductive Phenology: May; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Reproductive Phenology: October; Reproductive Phenology: November; Leaf Arrangement: alternate; Leaf Arrangement: opposite; Leaf Arrangement: subopposite; Leaf Complexity: simple; Leaf Dissection: 0; Leaf Persistance: Deciduous; Leaf Petiole Type: petiolate; Leaf Type: broadleaf; Leaf Type: succulent; Leaf Venation: pinnate; Leaflet Margins: entire; Leaflet Number: 0; Base Flower Color: Pink; Fruit Dehiscence: Yes; Fruit Type: Capsule; Fruit Wet/Dry: Dry; Overall Flower Symmetry: Actinomorphic; Sporangium Arrangement: N/A
C value N/A
StatusNot Native; AGCP (FACW), EMP (FAC) (NWPL); TN[SNR] (State Rank); G5 (Global Rank)
Specimen(s) View and Download Specimen Details »

** Not applicable or data not available.

Currently no photos are available for this plant.

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
Trianthema monogyna Trianthema monogyna L.

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: Shelby (TN), Wilson (TN)

Herbaria represented by specimen data listed below: EKY, HTTU, TENN, VDB

Range of years during which specimens were collected: 1982 - 1989

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
HTTU008120 Wilson Tennessee
Trianthema portulacastrum
BRIT68371 Shelby Tennessee 08 Oct 1989 R. Dale Thomas
Trianthema portulacastrum
TENN-V-0092037 Shelby Tennessee
Trianthema portulacastrum
TENN-V-0092039 Shelby Tennessee
Trianthema portulacastrum
31234100192994 Shelby Tennessee 16 Oct 1982 Elizabeth M. Browne
Trianthema portulacastrum
TENN-V-0092038 Shelby Tennessee
Trianthema portulacastrum
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