What vegetation was found on the Oregon Trail?

* Conifers:

* Douglas fir

* Ponderosa pine

* Western hemlock

* Western larch

* White fir

* Deciduous trees:

* Aspen

* Black cottonwood

* Broadleaf maple

* Douglas maple

* Red alder

* Valley oak

Shrubs

* Native shrubs:

* Bitterbrush

* Ceanothus

* Chokecherry

* Common snowberry

* Coyote brush

* Currant

* Elderberry

* Indian ricegrass

* Ninebark

* Oregon grape

* Rabbitbrush

* Sagebrush

* Salal

* Serviceberry

* Snowbrush

* Western poison oak

* Introduced shrubs:

* Common buckthorn

* Multiflora rose

* Tartarian honeysuckle

Grasses

* Native grasses:

* Bluebunch wheatgrass

* Idaho fescue

* Needlegrasses

* Pinegrass

* Prairie junegrass

* Sandberg bluegrass

* Thickspike wheatgrass

* Western wheatgrass

* Introduced grasses:

* Cheatgrass

* Medusahead

* Kentucky bluegrass

* Orchard grass

* Perennial ryegrass

* Reed canary grass

* Tall fescue

* Timothy

Forbs

* Native forbs:

* Arrowleaf balsamroot

* Aster

* Balsamroot

* Blazing star

* Common camas

* Death camas

* Elephanthead

* Fireweed

* Geranium

* Goldenrod

* Lupine

* Mariposa lily

* Monkeyflower

* Paintbrush

* Penstemon

* Scarlet gilia

* Showy aster

* Sidalcea

* Skyrocket

* Sunflower

* Sweet cicely

* Tansy

* Western yarrow

* Introduced forbs:

* Common mullein

* Common St. Johnswort

* Field bindweed

* Hoary cress

* Leafy spurge

* Musk thistle

* Oxeye daisy

* Purple loosestrife

* Queen Anne's lace

* St. Johnswort

* Yellow starthistle