Pilea microphylla

Family (Traditional)Urticaceae
Species:Pilea microphylla Liebm.
Common NameArtillery Plant; Gunpowder Plant; Rockweed
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: North America; Reproductive Phenology: January; Reproductive Phenology: Febuary; Reproductive Phenology: March; Reproductive Phenology: April; Reproductive Phenology: May; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Reproductive Phenology: October; Reproductive Phenology: November; Reproductive Phenology: December; Leaf Arrangement: alternate; Leaf Complexity: simple; Leaf Dissection: 0; Leaf Fragrance: No; Leaf Persistance: Deciduous; Leaflet Number: 0; Anther Type: Basifixed; Base Flower Color: Green; Fruit Dehiscence: No; Fruit Type: Achene; Fruit Wet/Dry: Dry; Overall Flower Symmetry: Actinomorphic; Sporangium Arrangement: N/A
C value N/A
StatusNot Native; AGCP (FACU), EMP (FAC) (NWPL); TN[SNR] KY[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
Adicea microphylla Adicea microphylla (L.) Kuntze
Parietaria microphylla Parietaria microphylla 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: Campbell (KY), Jefferson (KY), Madison (KY), Shelby (TN)

Herbaria represented by specimen data listed below: EKY, KNK, BEREA, TENN

Range of years during which specimens were collected: 1992 - 2015

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
31973000007918 Campbell Kentucky 17 Nov 2015 Whitson, Maggie (Mary)
2015-0032 1/4
Pilea microphylla
31973000007917 Campbell Kentucky 08 Nov 2015 Whitson, Maggie (Mary)
Pilea microphylla
31973000020103 Jefferson Kentucky 02 Sep 2004 Haragan, Patricia
Pilea microphylla
BEREA022181 Madison Kentucky
Pilea microphylla
TENN-V-0084815 Shelby Tennessee
Pilea microphylla
31234100694049 Madison Kentucky 20 Jul 1992 J. Richard Abbott
Pilea microphylla
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Plant Photos

Pilea microphylla - Milo Pyne
Pilea microphylla - Milo Pyne