1. Ireland, Orlin L., Plants of the Three Sisters Region. Bulletin #12, Museum of Natural History, University of Oregon. April 1968.

The scientific names used in this list are those used in the mid 1960s, and have not been updated. The list also lacks some species which I've seen within the Three Sisters Wilderness. Hopefully, someone will provide an updated list in the near future.

1. Equisetum arvense - Common Horsetail

1. Lycopodium annotinum - Stiff Clubmoss

2. Lycopodium sitchense - Alaskan Clubmoss

Isoetes bolanderi - Bolander's Quillwort

1. Botrychium silaifolium - Leather Grape-fern

1. Cheilanthes gracillima - Lace Fern

2. Cryptogramma acrostichoides - Parsley Fern

3. Cystopteris fragilis - Brittle Fern

4. Polystichum munitum - Sword Fern

5. Pteridum aquilinum - Bracken Fern, Western Brake-fern

1. Abies amabilis - Amabils Fir

2. Abies grandis - Grand Fir

3. Abies lasiocarpa - Alpine Fir

4. Picea engelmannii - Engelman's Spruce

5. Pinus albicaulis - White-bark Pine

6. Pinus contorta var. murrayana - Lodgepole Pine

7. Pinus monticola - Western White Pine

8. Pinus ponderosa - Ponderosa Pine

9. Pseudotsuga menziesii - Douglas Fir

10. Tsuga mertensiana - Mountain Hemlock

1. Juniperus communis var. montana - Dwarf Juniper

1. Sparganium angustifolium - Narrow-leaved Bur-reed

1. Potamogeton heterophyllus - Various-leaved Pondweed

2. Potamogeton natans - Common Floating Pondweed

1. Calochortus lobbii - Cascade Cat's Ear

2. Clintonia uniflora - One-flowered Clintonia

3. Erythronium grandiflorum var. pallidum - Lamb's Tongue Fawn Lily

4. Fritillaria atropurpurea - Purple Rice-root

5. Lilium washingtonianum - Cascade Lily

6. Smilacina amplexicaulis - Western False Solomon's Seal

7. Smilacina stellata var. sessiliofolia - Few-flowered False Solomon's Seal

8. Streptopus amplexifolius - Large Twisted-stalk

9. Streptopus curvipes - Smaller Twisted-stalk

10. Tofieldia occidentalis - Western Tofieldia

11. Trillium ovatum - Western Trillium

12. Veratrum viride - Green False Hellebore

13. Xerophyllum tenax - Bear-grass

1. Sisyrinchium idahoense - Idaho Blue-eyed Grass

1. Corallorhiza trifida - Early Coral-root

2. Corallorhiza maculata - Spotted Coral-root

3. Goodyera decipiens - Rattlesnake Plantain

4. Habenaria leucostachys - White-flowered Bog Orchid

5. Habenaria saccata - Slender Bog Orchid

6. Spiranthes romanzoffiana - Hooded Ladies' Tresses

1. Populus trichocarpa - Black Cottonwood

2. Salix barclayi - Barclay's Willow

3. Salix commutata - Variable Willow

4. Salix eastwoodiae - Eastwood's Willow

5. Salix geyeriana var. meleina - Geyer Willow

6. Salix scouleriana - Scouler Willow

7. Salix sitchensis - Sitka Willow

1. Alnus sinuata - Sitka Alder

2. Alnus tenuifolia - Mountain Alder

3. Betula glandulosa - Scrub Birch

1. Castanopsis crysophylla - Chinquapin

1. Comandra umbellata - Bastard Toad-flax

1. Arceuthobium abietinum - Fir Dwarf Mistletoe

2. Arceuthobium americanum - American Dwarf Mistletoe

1. Eriogonum pyrolaefolium var. coryphaeum - Alpine Buckwheat (Dirty Socks)

2. Eriogonum umbellatum - Sulfur-flowered Buckwheat

3. Oxyria digyna - Mountain Sorrel

4. Polygonum bistortoides - Mountain Meadow Knotweed

5. Polygonum douglasii - Douglas Knotweed

6. Polygonum kelloggii - Kellog's Knotweed

7. Polygonum minimum - Leafy Knotweed

8. Polygonum newberryi - Newberry's Knotweed

9. Polygonum parryi - Prickly Knotweed

10. Rumex acetosella - Sheep Sorrel

1. Chenopodium album - Pigweed

1. Claytonia bellidifolia - Rydberg's Claytonia

2. Lewisia pygmaea var. aridorum - Alpine Lewisia

3. Lewisia triphylla - Three-leaved Lewisia

4. Montia cordifolia - Cordate-leaved Montia

5. Montia perfoliata var. depressa - Small Miner's Lettuce

6. Spraguea umbellata var. caudicifera - Pussy Paws

1. Arenaria formosa - Mountain Sandwort

2. Arenaria macrophylla - Large-leaved Sandwort

3. Sagina occidentalis - Western Sandwort

4. Silene oregana - Oregon Campion

5. Silene suksdorfii - Suksdorf's Campion

6. Spergularia rubra - Sand Spurry

7. Stellaria borealis - Northern Starwort

8. Stellaria longipes - Long-stalked Starwort

9. Stellaria umbellata - Umbellate Chickweed

1. Nymphaea polysepala - Western Yellow Pondlily

1. Aconitum columbianum var. howellii - Howell's Aconite

2. Actaea arguta - Western Baneberry

3. Anemone drummondii - Drummond's Anemone

4. Anemone lyallii - Little Mountain Anemone

5. Anemone multifida var. globosa - Globose Anemone

6. Anemone occidentalis - Mountain Pasque Flower

7. Aquilegia formosa - Western Columbine

8. Caltha biflora - White Marsh-marigold

9. Caltha leptosepala - Slender-sepaled Marsh-marigold

10. Delphinium depauperatum - Dwarf Larkspur

11. Delphinium menziesii var. pyramidale - Menzies' Larkspur

12. Ranunculus alismaefolius var. alismellus - Plantain-leaved Buttercup

13. Ranunculus aquatilis var. capillaceus - Water Buttercup

14. Ranunculus eschscholtzii - Eschscholtz's Buttercup

15. Ranunculus gormanii - Gorman's Buttercup

1. Achlys triphylla - Vanilla-leaf

2. Berberis nervosa - Low Oregon Grape

1. Dicentra formosa - Pacific Bleeding Heart

1. Arabis divaricarpa - Spreading-pod Rock Cress

2. Arabis drummondii var. interposita - Drummond's Rock Cress

3. Arabis holboellii var. secunda - Secund Rock Cress

4. Arabis lyallii - Lyall's Rock Cress

5. Arabis platysperma - Broad-seeded Rock Cress

6. Barbarea americana - Winter Cress

7. Capsella bursa-pastoris - Shepherd's Purse

8. Cardamine bellidifolia var. pachyphylla - Alpine Bitter-cress

9. Draba aureola - Great Alpine Whitlow-grass

10. Draba stenoloba - Slender Whitlow-grass

11. Rorippa curvisiliqua - Western Yellow-cress

12. Smelowskia ovalis - Alpine Smelowskia

1. Gormania watsonii - Watson's Gormania

1. Heuchera glabra - Alpine Heuchera

2. Leptarrhena amplexifolia - False Saxifrage

3. Mitella breweri - Brewer's Mitrewort

4. Mitella ovalis - Oval-leaved Mitrewort

5. Mitella pendandra - Five-Point Mitrewort

6. Parnassia fimbriata - Fringed Grass-of-Parnassus

7. Parnassia intermedia - Cascade Grass-of-Parnussus

8. Saxifraga arguta - Mt. Meadow Saxifrage

9. Saxifraga ferruginea - Rusty Saxifrage

10. Saxifraga oregana - Oregon Saxifrage

11. Saxifraga tomiei - Tolmie's Saxifrage

12. Tiarella unifoliata - Western Coolwort

1. Ribes cereum - Wax Current

2. Ribes lacustre - Prickly Currant

3. Ribes petiolare - Western Black Currant

4. Ribes viscosissimum - Sticky Currant

1. Amelanchier florida - Western Serviceberry

2. Comarum palustre - Marsh Cinquefoil

3. Frageria platypetala - Broad-petaled Strawberry

4. Geum macrophyllum - Large-leaved Avens

5. Holodiscus glabrescens - Dwarf Ocean-spray

6. Luetkea pectinata - Partridgefoot

7. Potentilla breweri - Brewer's Cinquefoil

8. Potentilla drummondii - Drummond's Cinquefoil

9. Potentilla flabellifolia - Fringe-leaf Cinquefoil

10. Potentilla glandulosa - Sticky Cinquefoil

11. Potentilla gracilis - Slender Cinquefoil

12. Purshia tridentata - Bitterbrush

13. Prunus emarginata - Bitter Cherry

14. Rosa gymnocarpa - Wood Rose

15. Rubus lasiococcus - Dwarf Bramble

16. Rubus parviflorus - Thimbleberry

17. Rubus vitifolius - Wild Blackberry

18. Sibbaldia procumbens - Sibbaldia

19. Sorbus occidentalis - Dwarf Mountain Ash

20. Sorbus sitchensis - Western Mountain Ash

21. Spiraea densiflora - Mountain Spirea

22. Spirea douglassii - Western Spirea

1. Lathyrus lanszwertii var. aridus - Thick-leaved Pea

2. Lupinus latifolius var. subalpinus - Subalpine Lupine

3. Lupinus laxiflorus - Douglas' Spurred Lupine

4. Lupinus lepidus var. lyallii - Lyall's Lupine

5. Trifolium longipes - Long-stalked Clover

1. Pachystima myrsinites - Oregon Boxwood

1. Acer circinatum - Vine Maple

2. Acer glabrum var. douglasii - Douglas Maple

1. Ceanothus velutinus - Buck Brush

2. Rhamnus purshiana - Cascara

1. Hypericum anagalloides - Bog St. John's-wort

2. Hypericum scouleri - Western St. John's-wort

1. Viola adunca - Western Blue Violet

2. Viola glabella - Smooth Wood Violet

3. Viola macloskeyi - Small White Violet

4. Viola orbiculata - Round-leaved Violet

5. Viola palustris - Marsh Violet

6. Viola purpurea var. geophyta - Puple-tinted Violet

7. Viola praemorsa var. linguafolia - Upland Yellow Violet

1. Epilobium angustifolium - Fireweed

2. Epilobium glaberrimum - Smooth Willow-herb

3. Epilobium oregonense - Oregon Willow-herb

4. Epilobium clavatum - Club-fruited Willow-herb

5. Epilobium alpinum - Alpine Willow-herb

6. Epilobium hornemannii - Hornemann's Willow-herb

7. Epilobium lactiflorum - White-flowered Willow-herb

8. Gayophytum lasiospermum - Hairy-seeded Gayophytum

9. Gayophytum nuttallii - Nuttall's Gayophytum

1. Ligusticum grayi - Gray's Lovage

2. Lomatium angustatum - Cascade Lomatium

3. Lomatium martindalei - Martindale's Lomatium

4. Lomatium triternatum - Narrow-leaved Lomatium

5. Osmorhiza chilensis - Mountain Sweet Cicely

6. Osmorhiza occidentalis - Western Sweet Cicely

7. Sanicula bipinnatifida - Purple Sanicle

8. Sphenosciadium capitellatum - Swamp White-heads

1. Cornus canadensis - Bunchberry

2. Cornus stolonifera - Creek Dogwood

1. Arctostaphylos nevadensis - Pine-mat Manzanita

2. Arctostaphylos patula - Green Manzanita

3. Cassiope mertensiana - Western Mountain Heather

4. Chimaphila menziesii - Little Prince's Pine, Pipsissewa

5. Chimaphila umbellata var. occidentalis - Western Prince's Pine

6. Gaultheria humifusa - Matted Gaultheria

7. Gaultheria ovatifolia - Oregon Spicy Wintergreen

8. Hypopitys fimbriata - Fringed Pinesap

9. Kalmia microphylla - Kalmia

10. Phyllodoce empetriformis - Pink Mountain Heather

11. Phyllodoce glanduliflora - Yellow Mountain Heather

12. Pyrola dentata var. integra - Wintergreen

13. Pyrola minor - Common Wintergreen

14. Pyrola secunda - One-sided Wintergreen

15. Rhododendron albiflorum - White-flowered Rhododendron

16. Vaccinium caespitosum - Dwarf Huckleberry

17. Vaccinium deliciosum - Blue-leaved Huckleberry

18. Vaccinium membranaceum - Thin-leaved Huckleberry

19. Vaccinium occidentale - Western Huckleberry

20. Vaccinium ovalifolium - Oval-leaved Huckleberry

21. Vaccinium scoparium - Small-leaved Huckleberry

1. Gentiana newberryi - Newberry's Gentian

1. Dodecatheon jeffreyi - Tall Mountain Shooting Star

1. Menyanthes trifoliata - Buckbean

1. Apocynum pumilum - Dwarf Dogbane

1. Collomia larsenii - Talus Collomia

2. Gilia aggregata - Scarlet Gilia

3. Gilia congesta - Many-flowered Gilia

4. Microsteris gracilis - Slender Phlox

5. Phlox diffusa - Spreading Phlox

6. Polemonium californicum - Low Polemonium

7. Polemonium pulcherrimum - Showy Polemonium

1. Hydrophyllum fendleri var. albifrons - Fendler Waterleaf

2. Phacelia hastata var. compacta - Timberline Phacelia

3. Phacelia mutabilis - Changeable Phacelia

1. Allocarya hispidula - Harsh Allocarya

2. Cynoglossum occidentale - Western Hound's Tongue

3. Hackelia californica - California Stickseed

4. Hackelia diffusa - Diffuse Stickseed

1. Prunella vulgaris - Heal-all, Self-heal

1. Castilleja arachnoidea - Cotton Paintbrush

2. Castilleja miniata - Common Paintbrush

3. Castilleja oreopola (C. parviflora var. oreopola) - Rosy Paintbrush

4. Castilleja rupicola - Cliff Paintbrush

5. Castilleja suksdorfii - Suksdorf's Paintbrush

6. Collinsia parviflora - Small-flowered Collinsia

7. Mimulus breweri - Brewer's Monkeyflower

8. Mimulus guttatus - Common Monkeyflower

9. Mimulus lewisii - Lewis' Monkeyflower

10. Mimulus moschatus - Musk Monkeyflower

11. Mimulus primuloides - Primrose Monkeyflower

12. Mimulus tilingii - Mountain Monkeyflower

13. Orthocarpus imbricatus - Mountain Orthocarpus

14. Pedicularis attolens - Little Elephant's Head

15. Pedicularis flavida - Cascade Mountains Lousewort

16. Pedicularis groenlandica var. surrecta - Elephant's Head

17. Pedicularis racemosa - Leafy Lousewort

18. Penstemon cardwellii - Cardwell's Penstemon

19. Penstemon cinicola - Ash Penstemon

20. Penstemon davidsonii - Creeping Penstemon

21. Penstemon euglaucus - Glaucous Penstemon

22. Penstemon fruticosus - Shrubby Penstemon

23. Penstemon nemorosus - Woodland Penstemon

24. Penstemon procerus var. brachyanthus - Short-flowered Penstemon

25. Penstemon rupicola - Rock Penstemon

26. Veronica americana - American Brooklime

27. Veronica serpyllifolia - Thyme-leaved Speedwell

28. Veronica wormskjoldii - Alpine Speedwell

1. Utricularia vulgaris Common Bladderwort

1. Plantago major - Plantain

1. Galium bifolium - Low Mountain Bedstraw

2. Galium brandegei - Brandegee's Bedstraw

3. Galium trifidum var. pacificum - Small Bedstraw

4. Kelloggia galioides - Kelloggia

1. Linnaea borealis var. americana - Twinflower

2. Lonicera conjugialis - Red Twinberry

3. Lonicera involucrata - Black Twinberry

4. Sambucus callicarpa - Red Elderberry

5. Symphoricarpos albus - Common Snowberry

6. Viburnum pauciflorum - High-bush Cranberry

1. Valeriana sitchensis - Northern Valerian

1. Achillea millefolium var. lanulosa - Yarrow

2. Agoseris aurantiaca - Orange-flowered Agoseris

3. Anaphalis margaritacea - Pearly Everlasting

4. Anaphalis margaritaceae var. subalpina - Pearly Everlasting

5. Antennaria alpina var. media - Alpine Everlasting

6. Antennaria rosea - Rosy Everlasting

7. Antennaria umbrinella - Brown Everlasting

8. Arnica amplexicaulis - Clasping Arnica

9. Arnica cordifolia - Heart-leaved Arnica

10. Arnica diversifolia - Sticky Arnica

11. Arnica latifolia var. gracilis - Mountain Arnica

12. Arnica mollis - Soft-leaved Arnica

13. Aster alpigenus - Alpine Aster

14. Aster foliaceus var. parryi - Leafy Aster

15. Aster ledophyllus - Cascade Aster

16. Aster occidentalis - Western Mountain Aster

17. Aster radulinus - Rough-leaved Aster

18. Aster shastensis var. latifolius - Shasta Aster

19. Cirsium centaureae - Fringed-bract Thistle

20. Erigeron acris var. debilis - Bitter Erigeron

21. Erigeron compositus var. glabratus - Cut-leaf Fleabane

22. Erigeron peregrinus ssp. callianthemus - Subalpine Fleabane

23. Eupatorium occidentale - Western Eupatorium

24. Haplopappus bloomeri - Rabbit Brush Goldenweed

25. Hieracium albiflorum - White-flowered Hawkweed

26. Hieracium cynoglossoides - Hounds-tongue Hawkweed

27. Hieracium gracile - Alpine Hawkweed

28. Hieracium horridum - Shaggy Hawkweed

29. Hulsea nana - Dwarf Hulsea

30. Microseris alpestris - Alpine Microseris

31. Raillardella argentea - Silvery Raillardella

32. Senecio fremontii - Mountain Senecio

33. Senecio subnudus - Few-leaved Senecio

34. Senecio triangularis - Spear-head Senecio

35. Solidago canadensis var. elongata - Narrow goldenrod

36. Solidago spathulata var. nana - Dwarf Goldenrod

37. Stephanomeria lactucina - Large-flowered Stephanomeria