https://www.fws.gov/species/texas-screwstem-bartonia-texana/map
Texas Screwstem (Bartonia texana) | Map | U.S. Fish & Wildlife Service | FWS.gov
u s
https://hawthornhillwildflowers.blogspot.com/2024/02/white-screwstem-bartonia-verna.html
Native Florida Wildflowers: White Screwstem - Bartonia verna
White screwstem ( Bartonia verna ) is an annual member of the Genian family found nearly statewide in Florida in the edges of open shallow s...
nativefloridawildflowerswhitebartonia
https://fsus.ncbg.unc.edu/main.php?pg=show-taxon-detail.php&taxonid=9669
Bartonia paniculata ssp. texana (Texas Screwstem) - FSUS
bartoniapaniculatassptexanatexas
https://mnfi.anr.msu.edu/species/description/14237/bartonia-paniculata
Bartonia paniculata (Panicled screwstem) - Michigan Natural Features Inventory
natural featuresbartoniapaniculatamichiganinventory