Chronological List of Plants Found in Idaho
By Lewis and Clark in 1805/1806
by Date and Location
Additional
Plants Attributed to Lewis and Clark,
but not in the Lewis and Clark Herbarium*
13 Aug 1805
Lemhi River
Riverbank snowberry
(Symphoricarpos
albus)
Rocky Mountain maple
(Acer
glabrum)*
Western red baneberry (Actaea
arguta)*
2 Sep 1805
North Fork of Salmon River
Cascade mountain- ash (Sorbus
scopulina)
Rocky
mountain honeysuckle (Lonicera utahensis)
3 Sep 1805
Lyll's Angelica
(Angelica arguta)
4 Sept 1805
Lemhi County
Sitka mountain ash (Sorbus
scropulina)
15 Sept 1805
Lolo Trail
Western larch (Larix
occidentalis)*
15 Sept 1805
Lolo Trail
Subalpine fir (Abies
lasiocarpa)*
16 Sept 1805
Lolo Trail
Engelmann’s spruce (Picea
engelmannii)*
Whitebark pine (Pinus
albicaulis)*
Lodgepole pine (Pinus
contorta)*
20 Sept 1805
Lolo Trail
Sitka
Alder (Alnus sinuata)*
Western red cedar (Thuja
plicata)*
Common Snowberry (Symphoricarpos albus laevigatus)
25 Sept 1805
Lolo Trail
Pacific yew (Taxus
brevifolia*)
1 Oct 1805
Camp Canoe near Orofino
Ponderosa Pine (Pinus
ponderosa)
Sep/Oct 1805
Clearwater River Area
Dwarf
mountain fleabane (Erigeron
compositus)
Tobacco
bush (Ceanothus
velutinus)
Sticky Laurel (Ceanthus velutinus)*
6 May 1806
Clearwater River
Lewis’s
syringa, Mock orange
(Philadelphus lewisii)
Rabbit brush,
green (Chrysothamnus
viscidiflorus)
Ternate
desert parsley
(Lomatium triternatum)
7 May 1806
Clearwater River
Showy phlox (Phlox
speciosa)
8 May 1806
Clearwater River
Yellow
mission-bells (Fritillaria
pudica)
17 May 1806
Clearwater River near Kamiah
Mariposa lily (Calochortus
elegans)
20 May 1906
Clearwater River near Kamiah
American
Yarrow (Achille millefolium)
Canadian
Bunchberry (Cornus Canadensis)
Wilcox's Beardtongue
(Penstemon
wilcoxii)
27 May 1806
Clearwater River near Kamiah
Intermountain
rusty lupine (Lupinus pusillus)
Sugar bowls (Clematis
hirsutissima)
29 May 1806
Clearwater River near Kamiah
Bitter
cherry (Prunus emarginata)
Cascara
false buckthorn
(Frangula
purshiana)
Ocean-spray,
hillside (Holodiscus
discolor)
Western
chokecherry (Prunus virgininna)
30 May 1806
Clearwater River near Kamiah
Geyer’s onion (Allium
geyeri)
Tolmie’s onion (Allium
tolmiei)*
1 June 1806
Clearwater River near Kamiah
Pink
fairies (Clarkia
pulchella)
Pursh's wallflower (Erysimum
capitatum)
5 June 1806
Clearwater River near Kamiah
June
Grass (Koeleria macrantha)
Lance-leaf
stonecrop (Sedum lanceolatum)
Narrow-leaved skullcap (Scutellaria
angustifolia)
Orange honeysuckle (Lonicera
ciliosa)
Silky lupine (Lupinus
sericeus)
Silver
stem lupine (Lupinus argenteus)
Giant rye grass (Leymus
condensatus)*
6 June 1806
Clearwater River near Kamiah
Oregon
tea-tree (Ceanothus sanguineus)
Piper's
Windflower (Anemone piperi)
Wooly-sunflower (Eriophyllum
lanatum)
Oregon sunshine (Eriophyllum lanatum)
9 June 1806
Clearwater River near Kamiah
Variable-leaf
scorpion weed (Phacelia
heterophylla)
Rayless chamomile (Matricaria matricarioides)
10 June 1806
Toward
Weippe Prairie Area
Blue
bunch-wheat grass (Pseudoroegneria spicata)
Canby's
bluegrass (Aira
brevifolia)
Idaho Fescue (Festuca
idahoensis)
Many-lobbed
giant parsley (Lomatium
dissectum var. multifidum)
Nootka rose (Rosa nutkana)*
Cluster rose (Rosa
pisocarpa)*
Umatilla gooseberry (Ribes
cognatum)*
12 June 1806
Weippe Prairie
American
bistort (Polygonum
bistortoides)
Ciliated
old man's whiskers (Geum triflorum)
Pineapple
weed (Matricaria
matricarioides)
14 June 1806
Weippe Prairie Area
Clustered
elkwood (Frasera fastigiata)
Long-leaf sun cup (Camissonia
subacaulis)
15 June 1806
Near mouth of Lunch Creek
Purple
wake-robin (Trillium petiolatum)
Shrub
bear-tongue (Penstemon fruticosus)
Western
bear grass
(Xerophyllum tenax)
Yellow
avalanche lily (Erythronium grandiflorum)
16 June 1806
Lolo Trail
Bull
elephant head (Pedicularis groemlandica)
Oregon
box-leaf (Paxistima myrsinites)
Sticky currant
(Ribes viscossissimum)
Northwest
crimson columbine (Aquilegia formosa)*
Yellow-flowering pea (Lathyrus ochroleucus)*
23 June 1806
Lolo Trail
Camas, Small (Camassia quamash)
25 June 1806
Lolo Trail
California
false hellebore (Veratrum californicum)
26
June 1806
Near Hungry Creek Lolo Trail
Scarlet gilia
(Ipomopsis aggregata)
Western
mountain kitten tail (Synthyris missurica)
27
June 1806
Near Hungry Creek Lolo Trail
Jacob’s
ladder (Polemonium pulcherrimum)
Lance-leaf spring
beauty (Claytonia lanceolata)
Three-leaf
bitterroot (Lewisia
triphylla)
Western fairy slipper orchid (Calypso
bulbosa)
Long-tailed
wild ginger (Asarum caudatum)*
Buckbrush, Chaparral (Ceanthus saguineus)
June
1806
Likely Idaho
Fool's
huckleberry (Menziesia ferrugiata)
Sources:
The
Lewis and Clark Herbarium
Lewis
and Clark Special from the Oregonian
Expedition
to the Future: Botany