Brown (also Green) Flowers

Clustered lady slippers (Cypripedium fasciculatum)

Liverwort (a species of Marchantiophyta)

False hellebore, aka Corn lily (Veratrum californicum)

Nailwort (Paronychia)

Green bog orchid (Platanthera aquilonis)

Heartleaf twayblade (Listera cordata)