Plantae → Monocotyledoneae → Araceae
Columbia Water-Meal
Wolffia columbiana
Gabriel Campbell-Martinez · CC-BY
ORBIC List 2S1
State Rank
SX
S1
S2
S3
S4
S5
S1 — Critically Imperiled in Oregon
G5
Global Rank
Secure
List 2
ORBIC
Threatened in Oregon
What do these ranks mean? ORBIC's ranking definitions or NatureServe's conservation status categories
Ecoregions
Coast Range
Klamath Mountains
West Cascades
Willamette Valley
Counties
Benton · Clackamas · Clatsop · Douglas · Jackson · Lane · Linn · Multnomah · Yamhill
Other states / provinces
CA+
Range map
Certain
Possible
Extirpated
Absent