candidum — small white lady's-slipper Drosera filiformis — thread-leaved sundew Eleocharis equisetoides — horsetail spike-rush Epilobium densiflorum — dense spike-primrose Epilobium torreyi — brook spike-primrose Frasera caroliniensis — American columbo Gentiana alba — white prairie gentian Geum peckii — eastern mountain avens Isoetes engelmannii — Engelmann's quillwort Isotria medeoloides — small whorled pogonia Isotria verticillata — large whorled pogonia Juglans cinerea — butternut Juncus kelloggii — Kellogg's rush Lespedeza virginica — slender bush-clover Liparis liliifolia — purple twayblade Lipocarpha micrantha — small-flowered lipocarpha Lotus formosissimus — seaside bird's-foot lotus Lotus pinnatus — bog bird's-foot trefoil Lupinus densiflorus — dense-flowered lupine Lupinus lepidus var. lepidus — prairie lupine Lupinus rivularis — streambank lupine Magnolia acuminata — cucumber tree Meconella oregana — white meconella Microseris bigelovii — coast microseris Minuartia pusilla — dwarf sandwort Morus rubra — red mulberry Opuntia humifusa — eastern prickly pear cactus Orthocarpus barbatus — Grand Coulee owl-clover Orthocarpus bracteosus — rosy owl-clover Panax quinquefolius — American ginseng Pedicularis furbishiae — Furbish's lousewort Phacelia ramosissima — branched phacelia Plantago cordata — heart-leaved plantain Platanthera leucophaea — eastern prairie fringed-orchid Platanthera praeclara — western prairie fringed-orchid Polygala incarnata — pink milkwort Psilocarphus brevissimus (southern mountain population) — dwarf woolly-heads Psilocarphus elatior — tall woolly-heads Pycnanthemum incanum — hoary mountain-mint Ranunculus alismifolius var. alismifolius — water-plantain buttercup Rotala ramosior — toothcup Salix jejuna — barrens willow Sanicula arctopoides — bear's-foot sanicle Silene scouleri grandis — coastal Scouler's catchfly Silene spaldingii — Spalding's campion Solidago speciosa — showy goldenrod Stylophorum diphyllum — wood-poppy Symphyotrichum frondosum — short-rayed alkali aster Tephrosia virginiana — Virginia goat's-rue Tonella tenella — small-flowered tonella Trichophorum planifolium — bashful bulrush Trillium flexipes — drooping trillium Triphora trianthophora — nodding pogonia Triphysaria versicolor versicolor — bearded owl-clover Tripterocalyx micranthus — small-flowered sand-verbena Triteleia howellii — Howell's triteleia Viola pedata — bird's-foot violet Woodsia obtusa — blunt-lobed woodsia Threatened vascular plants Aletris farinosa — colicroot Azolla mexicana — Mexican mosquito-fern Bartonia paniculata paniculata — branched bartonia Braya fernaldii — Fernald's braya Buchloe dactyloides — buffalograss Calochortus lyallii — Lyall's mariposa lily Camassia scilloides — wild hyacinth Carex sabulosa — Baikal sedge Castilleja rupicola — cliff paintbrush Celtis tenuifolia — dwarf hackberry Cephalanthera austiniae — phantom orchid Chenopodium subglabrum — smooth goosefoot Cirsium hillii — Hill's thistle Corydalis scouleri — Scouler's corydalis Dalea villosa var. villosa — hairy prairie-clover Eleocharis tuberculosa — tubercled spike-rush Enemion biternatum — false rue-anemone Eurybia