Home Smithsonian: National Museum of Natural History Home
Lewis & Clark as Naturalists
The Collection: Locality Information Lewis and Clark as Naturalists
plants

President Jefferson wanted Meriwether Lewis to know more about observing and collecting plants before he left on the westward journey. He sent Lewis to Philadelphia to take crash courses in all the important sciences, including botany.
Lewis' Philadelphia education proved valuable after all. He learned how to identify and collect plants, and he gained the vocabulary needed to describe plants. Of the plant collections that survived the journey, 94 were new to science.
Another side to the plant story is the great deal of scientific study that came in the years following the expedition. Besides Lewis, six other men recorded new plants and the wildly exotic landscape in their journals. Their descriptions had an invigorating effect on the publishing of new plants collected in the West. But there is another side to the plant story. The trees, shrubs and wildflowers seen by the expedition were a source of great beauty and wonder. That beauty inspired some of the richest and most eloquent prose found in their journals ... to which the information on this site would most certainly attest.


Species Common Name
Polygonum bistortoides Pursh American bistort
Ribes americanum P. Mill. American black currant
Leymus mollis (Trin.) Pilger American dunegrass
Ulmus americana L. American elm
Purshia tridentata (Pursh) DC. antelope bitterbush
Symphyotrichum oblongifolium (Nutt.) Nesom aromatic aster
Balsamorhiza sagittata (Pursh) Nutt. arrowleaf balsamroot
Coreopsis tinctoria Nutt. var. atkinsoniana (Dougl. ex Lindl.) H.M.Parker ex E.B.Sm. Atkinson's tickseed
Lomatium nudicaule (Pursh) Coult. & Rose barestem biscuitroot
Corylus cornuta Marsh. beaked hazlenut
Arctostaphylos uva-ursi (L.) Spreng. bearberry, kinnikinnick
Oxytropis besseyi (Rydb.) Blank. Bessey's locoweed
Andropogon gerardii Vitman big bluestem
Artemisia tridentata Nutt. big sagebrush
Acer macrophyllum Pursh bigleaf maple
Prunus emarginata (Dougl. ex Hook.) Walp. bitter cherry
Lewisia rediviva Pursh bitter root
Populus balsamifera L. ssp. trichocarpa black cottonwood
Crataegus douglasii Lindl. black hawthorn
Echinacea angustifolia DC. blacksamson echinacea
Sambucus nigra L. ssp. caerulea (Raf.) R.Bolli blue elderberry
Pseudoroegneria spicata (Pursh) A. Love bluebunch wheatgrass
Vaccinium uliginosum L. bog blueberry
Asarum caudatum Lindl. British Columbia wildginger
Opuntia fragilis (Nutt.) Haw. brittle pricklypear
Sagittaria latifolia Willd. broadleaf arrowhead, wapato
Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed
Cornus canadensis L. bunchberry dogwood
Quercus macrocarpa Michx. bur oak
Penstemon fruticosus (Pursh) Greene bush penstemon
Veratrum californicum Dur. California false hellebore
Urtica dioica L. ssp. gracilis (Ait.)Seland. California nettle
Elymus canadensis L. Canada wildrye
Anemone canadensis L. Canadian anemone
Astragalus canadensis L. Canadian milkvetch
Mahonia nervosa (Pursh) Nutt. Cascade barberry
Fritillaria affinis (Schultes) Sealy checker lily
Prunus virginiana L. chokecherry
Rosa pisocarpa Gray cluster rose
Frasera fastigiata (Pursh) Heller clustered green gentian
Xerophyllum tenax (Pursh) Nutt. common beargrass
Heracleum maximum Bartr. common cowparsnip
Gaillardia aristata Pursh common gaillardia
Juniperus communis L. var. depressa Pursh common juniper
Symphoricarpos albus (L.) Blake common snowberry
Eriophyllum lanatum (Pursh) Forbes common woolly sunflower
Lomatium cous (S.Wats.) Coult. & Rose cous biscuitroot
Mahonia repens (Lindl.) G.Don creeping barberry
Juniperus horizontalis Moench creeping juniper
Grindelia squarrosa (Pursh) Dunal curlycup gumweed
Erigeron compositus Pursh cutleaf daisy
Blechnum spicant (L.) Sm. deer fern
Amorpha fruticosa L. desert false indigo
Cammisonia subacaulis (Pursh) Raven diffuseflower evening primrose
Matricaria matricarioides (Less.) Porter disc mayweed
Pseudotsuga menziesii (Mirb.) Franco Douglas fir
Symphyotrichum eatonii (Gray) Nesom Eaton's aster
Cirsium edule Nutt. edible thistle
Calochortus elegans Pursh elegant mariposa lily
Pedicularis groenlandica Retz. elephanthead lousewort
Picea engelmannii Parry ex Engelm. Engelmann spruce
Vaccinium ovatum Pursh evergreen huckleberry, California huckleberry
Calypso bulbosa (L.) Oakes fairy slipper
Lomatium dissectum (Nutt.) Mathias & Constance fernleaf biscuitroot
Pedicularis cystopteridifolia Rydb. fernleaved pedicularis
Cerastium arvense L. field chickweed
Equisetum arvense L. field horsetail
Thlaspi arvense L. field pennycress
Artemisia campestris L. ssp. caudata (Michx.) H.M.Hall&Clem. field sagewort
Euphorbia cyathophora Murray fire on the mountain
Atriplex canescens (Pursh) Nutt. fourwing saltbush
Hordeum jubatum L. foxtail barley
Perideridia gairdneri (Hook & Arn.) Mathias Gairdner's yampah
Atriplex gardneri (Moq.) D.Dietr. Gardner's saltbush
Allium geyeri S.Wats. Geyer's onion
Collinsia grandiflora Lindl. giant blue eyed Mary
Leymus condensatus (J.Presl) A.Love giant wildrye
Ribes aureum Pursh golden currant
Hydrastis canadensis L. goldenseal
Abies grandis (Dougl. ex D.Don) Lindl. grand fir
Sarcobatus vermiculatus (Hook.) Torr. greasewood
Sorbus scopulina Greene Greene's mountain ash
Astragalus crassicarpus Nutt. groundplum milkvetch
Clematis hirsutissima Pursh hairy clematis
Mirabilis nyctaginea (Michx.) MacMill. heartleaf four o'clock
Ampelopsis cordata Michx. heartleaf peppervine
Calystegia sepium (L.) R. Br. ssp. sepium hedge false bindweed
Machaeranthera canescens (Pursh) A.Gray var. incana (Lindl.) A.Gray hoary tansyaster
Mahonia aquifolium (Pursh) Nutt. hollyleaved barberry
Festuca idahoensis Elmer Idaho fescue
Trillum petiolatum Pursh Idaho trillium
Nicotiana quadrivalvis Pursh Indian tobacco
Polemonium pulcherrimum Hook. Jacob's ladder
Helianthus tuberosus L. Jerusalem artichoke
Machaeranthera pinnatifida (Hook.) Shinners lacy tansyaster
Salvia reflexa Hornem. lanceleaf sage
Claytonia lanceolata Pall. ex Pursh lanceleaf springbeauty
Pediomelum esculentum (Pursh) Rydb. large Indian breadroot
Triteleia grandiflora Lindl. largeflower triteleia, wild hyacinth
Trifolium macrocephalum (Pursh) Poir. largehead clover
Psoralidium lanceolatum (Pursh) Rydb. lemon scurfpea
Philadelphus lewisii Pursh Lewis' mock orange
Uropappus lindleyi (DC.) Nutt. Lindley's silverpuffs
Bazzania trilobata (L.) Gray liverwort
Pinus contorta Dougl. ex Loud. lodgepole pine
Artemisia longifolia Nutt. longleaved wormwood
Angelica arguta Nutt. Lyall's angelica
Amsinckia menziesii (Lehm.) A.Nelson & J.F.Macbr. var. retrorsa (Suksd.) Reveal & Schuyler Menzies' fiddleneck
Delphinium menziesii DC. Menzies' larkspur
Claytonia perfoliata Donn ex Willd. miner's lettuce
Astragalus missouriensis Nutt. Missouri milkvetch
Bromus marginatus Nees ex Steud. mountain brome
Zigadenus elegans Pursh mountain deathcamas
Tsuga mertensiana (Bong.) Carr. mountain hemlock
Cypripedium montanum Dougl. ex Lindl. mountain lady's slipper
Montia linearis (Doug. ex Hook.) Greene narrowleaf minerslettuce
Scutellaria angustifolia Pursh narrowleaf skullcap
Populus angustifolia James narrowleaved cottonwood
Hesperostipa comata (Trin. & Rupr.) Barkworth needle and thread
Lomatium triternatum (Pursh) Coult. & Rose nineleaf biscuitroot
Rosa nutkana K.Presl Nootka rose
Zizania palustris L. var. interior (Fassett) Dore northern wildrice
Cardamine nuttallii Greene Nuttall's toothwort
Holodiscus discolor (Pursh) Maxim. oceanspray
Geum triflorum Pursh old man's whiskers
Lonicera ciliosa (Pursh) Poir. ex DC. orange honeysuckle
Fraxinus latifolia Benth. Oregon ash
Paxistima myrsinites (Pursh) Raf. Oregon boxleaf
Malus fusca (Raf.) Schneid. Oregon crabapple
Quercus garryana Dougl. ex Hook. Oregon white oak
Oxalis oregana Nutt. Oregon wood-sorrell, redwood sorrell
Maclura pomifera (Raf.) Schneid. Osage orange
Argentina egedii (Wormsk.) Rydb. Pacific cinquefoil
Rubus vitifolius Cham. & Schlecht. Pacific dewberry
Cornus nuttallii Audubon ex Torr.& Gray Pacific dogwood
Arbutus menziesii Pursh Pacific madrone
Plagiobothrys tenellus (Nutt. ex Hook.) Gray Pacific popcornflower
Rhododendron macrophyllum D.Don ex G.Don Pacific rhododendron
Trillium ovatum Pursh Pacific trillium
Taxus brevifolia Nutt. Pacific yew
Betula papyrifera Marsh. paper birch
Asimina triloba (L.) Dunal pawpaw
Salix amygdaloides Anderss. peach-leaved willow
Clarkia pulchella Pursh pinkfairies, ragged robin
Anemone piperi Britt. ex Rydb. Piper's anemone
Populus deltoides Bartr. ex Marsh. ssp. monilifera (Ait.) Eckenw. plains cottonwood
Opuntia polyacantha Haw. plains pricklypear
Dodecatheon poeticum L.F. Hend. poet's shootingstar
Pinus ponderosa P.&C. Lawson ponderosa pine
Liatris pycnostachya Michx. prairie blazing star
Desmanthus illinoensis (Michx.) MacM. ex B.L. Robins. & Fern. prairie bundleflower
Linum lewisii Pursh prairie flax
Koeleria macrantha (Ledeb.) J.A.Schultes prairie Junegrass
Rosa arkansana Porter prairie rose
Artemisia frigida Willd. prairie sagewort
Mimulus lewisii Pursh purple monkeyflower
Artemisia cana Pursh purple sagebrush
Frangula purshiana (DC.) Cooper Pursh's buckthorn
Alnus rubra Bong. red alder
Aquilegia canadensis L. red columbine
Ribes sanguineum Pursh redflower currant
Ceanothus sanguineus Pursh redstem ceanothus
Phalaris arundinacea L. reed canarygrass
Cleome serrulata Pursh Rocky Mountain bee plant
Iris missouriensis Nutt. Rocky Mountain iris
Juniperus scopulorum Sarg. Rocky Mountain juniper
Acer glabrum Torr. Rocky Mountain maple
Ericameria nauseosa (Pall. ex Pursh) Nesom & Baird rubber rabbitbrush
Gaultheria shallon Pursh salal, shallon
Rubus spectabilis Pursh salmonberry
Salix interior Rowlee sandbar willow
Poa secunda J.Presl Sandberg bluegrass
Erysimum capitatum (Dougl. ex Hook.) Greene sanddune wallflower
Polanisia dodecandra (L.) DC. ssp. trachysperma (Torr.&Gray) Iltis sandyseed clammyweed
Amelanchier alnifolia (Nutt.) Nutt. ex M.Roemer Saskatoon serviceberry
Ipomopsis aggregata (Pursh) V.Grant scarlet gilia
Sphaeralcea coccinea (Nutt.) Rydb. scarlet globemallow
Lupinus littoralis Dougl. seashore lupine
Mimulus guttatus DC. seep monkeyflower
Phlox speciosa Pursh showy phlox
Dasiphora fruticosa (L.) Rydb. shrubby cinquefoil
Claytonia sibirica L. Siberian springbeauty
Lupinus sericeus Pursh silky lupine
Shepherdia argentea (Pursh) Nutt. silver buffaloberry, rabbitberry
Sphaeromeria argentea Nutt. silver chickensage
Elaeagnus commutata Bernh. ex Rydb. silverberry
Pediomelum argophyllum (Pursh) J. Grimes silverleaf Indian breadroot
Lupinus argenteus Pursh silvery lupine
Alnus viridis (Vill.) Lam. ssp. sinuata (Regel) A.&D. Love Sitka alder
Picea sitchensis (Bong.) Carr. Sitka spruce
Rhus trilobata Nutt. skunkbush sumac
Chamaecrista fasciculata (Michx.) Greene var. fasciculata sleepingplant
Salix sp. slender willow
Psoralidium tenuiflorum (Pursh) Rydb. slimflower scurfpea
Camassia quamash (Pursh) Greene small camas
Trifolium microcephalum Pursh smallheaded clover
Ericameria nauseosa var. graveolens (Nutt.) Reveal & Schuyler smooth rubber rabbitbrush
Euphorbia marginata Pursh snow on the mountain
Ceanothus velutinus Dougl. ex Hook. snowbrush ceanothus
Sedum lanceolatum Torr. spearleaf stonecrop
Dryopteris carthusiana (Vill.) H.P.Fuchs spinulose woodfern
Ribes divaricatum Dougl. spreading gooseberry
Rorippa sinuata (Nutt.) A.S. Hitchc. spreading yellowcress
Ribes viscosissimum Pursh sticky currant
Oligoneuron rigidum (L.) Small var. humile (Porter) Nesom stiff goldenrod
Claytonia parviflora Dougl. ex Hook. streambank springbeauty
Abies lasiocarpa (Hook.) Nutt. subalpine fir
Synthyris missurica (Raf.) Pennell tailed kittentails
Liatris aspera Michx. tall blazing star
Artemisia dracunculus L. tarragon
Mentzelia decapetala (Pursh ex Sims) Urban & Gilg. ex Gilg. tenpetal blazingstar
Rubus parviflorus Nutt. thimbleberry
Vaccinium membranaceum Dougl. ex Torr. thinleaf huckleberry
Orthocarpus tenuifolius (Pursh) Benth. thinleaved owl's-clover
Phacelia linearis (Pursh) Holz. threadleaf phacelia
Collomia linearis Nutt. tiny trumpet
Allium tolmiei (Hook.) Baker ex S.Wats. Tolm's onion
Oenothera caespitosa Nutt. tufted evening-primrose
Lonicera involucrata Banks ex Spreng. twinberry honeysuckle
Lonicera utahensis S.Wats. Utah honeysuckle
Phacelia heterophylla Pursh varileaf phacelia
Acer circinatum Pursh vine maple
Dalea purpurea Vent. violet prairie clover
Elymus virginicus L. Virginia wildrye
Betula occidentalis Hook. water birch
Ribes cereum Dougl. wax currant
Lomatium cuspidatum Mathias & Constance Wenatchee desert parsley
Pteridium aquilinum (L.) Kuhn western brackenfern
Aquilegia formosa Fisch. ex DC. western columbine
Larix occidentalis Nutt. western larch
Sorbus sitchensis M.Roemer western mountain ash
Thuja plicata Donn ex D.Don western red cedar
Symphoricarpos occidentalis Hook. western snowberry
Pinus monticola Dougl. ex D.Don western white pine
Achillea millefolium L. var. occidentalis DC. western yarrow
Alnus rhombifolia Nutt. white alder
Polygala alba Nutt. white milkwort
Artemisia ludoviciana Nutt. white sagebrush
Pinus albicaulis Engelm. whitebark pine
Vaccinium myrtillus L. whortleberry
Penstemon wilcoxii Rydb. Wilcox's beardtongue
Rosa woodsii Lindl. Wood's rose
Sedum stenopetalum Pursh wormleaf stonecrop
Lomatium ambiguum (Nutt.) Coult. & Rose Wyeth's biscuit root
Erythronium grandiflorum Pursh yellow avalanche-lily
Fritillaria pudica (Pursh) Spreng. yellow fritillary
Chrysothamnus viscidiflorus (Hook.) Nutt. yellow rabbitbrush

Image Display <EM>Rhus trilobata </EM>Nutt.
Rhus trilobata Nutt.


 
 
Smithsonian Institution
Copyright Notice
Privacy Notice