Lakeside hemlock

Conioselinum scopulorum, July 19, 2022

Common & scientific name
Hemlock parsley, Conioselinum scopulorum

Family
Parsley, Apiaceae

Location
Linkins Lake, 12,000’

Fun, weird, helpful, or little known fact
The sheath on the single stem leave midway up the plant is the defining feature of this uncommon, water-loving parsley. I PRESUME it’s poisonous owing to its name, but can’t find info one way or the other (?)