Trillium petiolatum
PNW
ID
OR
WA
360 specimens from 20 herbaria:
Idaho (154)
Oregon (85)
Washington (121)
162 images from 16 herbaria:
BLMVL (1)
CIC (24)
CIC-PYNF (3)
EWU (16)
ID (52)
IDS (13)
LEA (1)
MONT (3)
NOCA (1)
PSM (8)
REED (3)
SRP (21)
UBC (2)
WCW (6)
WTU (5)
WWB (3)