Isoetes howellii

Howell's quillwort
Family:Isoetaceae

Rarity

CNPS-EB: A1

2 current natural populations

Criteria:
  • Limited/Threatened Habitat
  • Declining

Ecology

Habitats:
  • Miscellaneous Wetlands

Populations

Key
LocationPop IDLast RecordedNotes
Mt. Diablo State Park - North side42022-04-15
Mt. Diablo State Park - South side22022-05-07
Antioch - other or unknown sites11895-12-31Historic
Del Valle Regional Park71991-05-08ID Uncertain
Mt. Diablo State Park - East side31935-06-28Historic
Pinole - EBMUD land nearby61998-12-31Historic
Vasco Caves Rgnl Park51997-03-19Historic