Plants
Collected or Reported by
Merriwether Lewis and William Clark
Alphabetical List of Plants Found in Idaho
American
bistort (Polygonum
bistortoides)
Jim Ford Creek, Weippe Prairie, 12 June 1806
American
Yarrow (Achille millefolium)
Near Kamiah, 20 May 1806
Bitter
cherry (Prunus emarginata)
Near Kamiah, 29 May 1806
Blue
bunch-wheat grass (Pseudoroegneria spicata)
Toward Weippe Prairie, 10 Jun 1806
Bull
elephant head (Pedicularis groemlandica)
Lolo Trail, 16 June 1806
California
false hellebore (Veratrum californicum)
Lolo Trail, 25 June 1806
Camas, Small (Camassia quamash)
Weippe Prairie, 23 June 1806
Canadian
Bunchberry (Cornus Canadensis)
Near Kamiah, 20 May 1806
Canby's
bluegrass (Aira
brevifolia)
Weippe Prairie Area, June 10, 1806
Cascade mountain- ash
(Sorbus
scopulina)
Lolo Trail, 2 Sep 1805
Cascara
false buckthorn
(Frangula
purshiana)
Clearwater River near Kamiah 29 May 1806
Ciliated
old man's whiskers (Geum triflorum)
Weippe Prairie area 12 June 1806
Clustered
elkweed (Frasera fastigiata)
Weippe Prairie Area, 14 June 1806
Dwarf
mountain fleabane (Erigeron
compositus)
Clearwater River, Sep/Oct 1805
Fool's
huckleberry (Menziesia ferrugiata)
Likely Idaho June 1806
Geyer’s onion
(Allium
geyeri)
Clearwater River near Kamiah, 30 May 1806
Idaho Fescue
(Festuca
idahoensis)
Near mouth of Lunch Creek Lolo Trail, 10 June 1806
Intermountain
rusty lupine (Lupinus pusillus)
Near Kamiah, 27 May 1806
Jacob’s
ladder (Polemonium pulcherrimum)
Near Hungry Creek Lolo Trail, 27 June1806
June
Grass (Koeleria macrantha)
Near Kamiah, 5 June 1806
Lance-leaf spring
beauty (Claytonia lanceolata)
Lolo Trail, 27 June 1806
Lance-leaf
stonecrop (Sedum lanceolatum)
On the Kooskooskie near Kamiah, 5 June 1806
Lewis’s
syringa, Mock orange
(Philadelphus lewisii)
Clearwater River, May 6, 1806
Long-leaf sun cup
(Camissonia
subacaulis)
Weippe Prairie area, 14 June 1806
Lyll's Angelica
(Angelica arguta)
Lost Trail Pass 3 Sep 1805
Many-lobbed
giant parsley (Lomatium
dissectum var. multifidum)
Toward
Weippe Prairie area June 10, 1806
Mariposa lily
(Calochortus
elegans)
Clearwater River near Kamiah, 17 May 1806
Narrow-leaved skullcap
(Scutellaria
angustifolia)
Clearwater River area near Kamiah, 5 June 1806
Ocean-spray,
hillside (Holodiscus
discolor)
Clearwater River near Kamiah, 29 May 1806
Orange honeysuckle
(Lonicera
ciliosa)
Clearwater River near Kamiah, 5 June 1806
Oregon
box-leaf (Paxistima myrsinites)
Lolo Trail, 16 June 1806
Oregon
tea-tree (Ceanothus sanguineus)
Near Hungry Creek on Lolo Trail, 6 Jun 1806
Pineapple
weed (Matricaria
matricarioides)
Clearwater River near Kamiah, 12 June 1806
Pink
fairies (Clarkia
pulchella)
Clearwater River near Kamiah, 1 June 1806
Piper's
Windflower (Anemone piperi)
Lolo Trail, 6 June 1806
Ponderosa pine,
Rocky Mountain (Pinus
ponderosa)
Clearwater River, 1 Oct 1805
Purple
wake-robin (Trillium petiolatum)
Near mouth of Lunch Creek, 15 June 1806
Pursh's wallflower
(Erysimum
capitatum)
Clearwater River near Kamiah, 1 June 1806
Rabbit brush,
green (Chrysothamnus
viscidiflorus)
Clearwater River, 6 May 1806
Riverbank snowberry
(Symphoricarpos
albus)
Pattee Creek 13 Aug 1805
Rocky
mountain honeysuckle (Lonicera utahensis)
North Fork of Salmon River, 2 Sep 1805 or Lolo Trail, 16 June 1806
Scarlet gilia
(Ipomopsis aggregata)
Lolo Trail, 26 June 1806
Showy phlox (Phlox
speciosa)
Clearwater River, 7 May 1806
Shrub
bear-tongue (Penstemon fruticosus)
Lolo Trail, 15 June 1806
Silky lupine
(Lupinus
sericeus)
Clearwater River near Kamiah, 5 June1806
Silver
stem lupine (Lupinus argenteus)
Near Kamiah. 5 June 1806
Sticky currant
(Ribes viscosissimum)
Lolo Trail, 16 June 1806
Sugar bowls
(Clematis
hirsutissima)
Clearwater River near Kamiah, 27 May 1806
Ternate
desert parsley
(Lomatium triternatum)
Clearwater River, 6 May 1806
Three-leaf
bitterroot (Lewisia
triphylla)
Near Hungry Creek Lolo Trail. 27 June 1806
Tobacco
bush (Ceanothus
velutinus)
Prob. near
Clearwater River, Sep/Oct 1805
Variable-leaf
scorpion weed (Phacelia
heterophylla)
Clearwater River near Kamiah, 9 June 1806
Western
bear grass
(Xerophyllum tenax)
Near mouth of Lunch Creek Lolo Trail 15 June 1806
Western
chokecherry (Prunus virgininna)
Near Kamiah, 29 May 1806
Western fairy slipper orchid
(Calypso
bulbosa)
Lolo Trail, 27 June 1806
Western
mountain kitten tail (Synthyris missurica)
Near Hungry Creek Lolo Trail, 26 June 1806
Wilcox's Beardtongue
(Penstemon
wilcoxii)
Clearwater River Near Kamiah Area 20 May 1806
Wooly-sunflower
(Eriophyllum
lanatum)
Clearwater River near Kamiah, 6 June 1806
Yellow
mission-bells (Fritillaria
pudica)
Clearwater River, 8 May 1806
Yellow
avalanche lily (Erythronium grandiflorum)
Lolo Trail, 15 June1806
Source: The Lewis and Clark Herbarium
Additional Plants Attributed to Lewis and Clark, but not in the Lewis and Clark Herbarium
Source: Lewis and Clark Special from the Oregonian
Cluster rose (Rosa
pisocarpa)
Weippe Prairie Area, 10 Jun 1806
Engelmann’s spruce (Picea
engelmannii)
Lolo Trail, Sep 1805
Giant rye grass (Leymus
condensatus)
Clearwater River Area, 5 Jun 1806
Lodgepole pine (Pinus
contorta)
Lolo Trail, Sep 1805
Long-tailed
wild ginger (Asarum caudatum)
Lolo Trail 27 Jun 1806
Nootka rose (Rosa nutkana)
Weippe Prairie Area, 10 Jun 1806
Northwest
crimson columbine (Aquilegia formosa)
Lolo Trail, 16 Jun1806
Pacific yew
(Taxus
brevifolia)
Lolo Trail, Sep1805
Rocky Mountain maple (Acer
glabrum)
Lemhi River, Aug. 13, 1805
Sitka alder (Alnus sinuata)
Lolo Trail, Sep 1805
Subalpine fir (Abies
lasiocarpa)
Lolo Trail, Sep 1805
Tolmie’s onion (Allium
tolmiei)
Clearwater River Area 30 May1806
Umatilla gooseberry
(Ribes
cognatum)
Weippe Prairie Area 10 Jun 1806
Western larch (Larix
occidentalis)
Lolo Trail, Sep 1805
Western red baneberry (Actaea
arguta)
Lemhi River, 13 Aug 1805
Western red cedar (Thuja
plicata)
Lolo Trail, Sep 1805]
Whitebark pine (Pinus
albicaulis)
Lolo Trail, Sep 1805
Yellow-flowering pea (Lathyrus ochroleucus)
Lolo Trail 16 Jun 1806