PlantQuest Species List for San Juan County, Washington

Scientific Name
(* = Introduced)		 Family Common Name Habitat Bloom Period
Agoseris elata Asteraceae tall agoseris; tall goat-chicory western forest; eastern forest; prairie or bald Jun, Jul
Amsinckia intermedia Boraginaceae fireweed fiddleneck; rancher's fiddleneck eastern forest; prairie or bald; shrub-steppe Apr, May, Jun
Angelica genuflexa Apiaceae kneeling angelica western forest; freshwater Jun, Jul, Aug
Athysanus pusillus Brassicaceae sandweed eastern forest; prairie or bald; shrub-steppe Mar, Apr, May, Jun
Atriplex patula * Amaranthaceae halberdleaf orache; spear orache shrub-steppe; saltwater shores Jun, Jul, Aug, Sep
Azolla filiculoides Salviniaceae duckweed fern; large mosquito fern freshwater Jul, Aug, Sep, [no flowers]
Azolla microphylla Salviniaceae Mexican waterfern fern; mosquito fern freshwater Jul, Aug, Sep, [no flowers]
Balsamorhiza deltoidea Asteraceae deltoid balsamroot; Puget balsamroot western forest; eastern forest; prairie or bald Mar, Apr, May, Jun, Jul
Berula incisa Apiaceae freshwater Jul, Aug, Sep
Buddleja davidii * Scrophulariaceae orange-eye butterfly-bush western forest; prairie or bald; freshwater; disturbed areas Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
Calamagrostis canadensis var. canadensis Poaceae bluejoint reedgrass Jun, Jul, Aug
Castilleja miniata Orobanchaceae common paintbrush; scarlet paintbrush western forest; eastern forest; subalpine or alpine; saltwater shores May, Jun, Jul, Aug, Sep
Castilleja miniata var. dixonii Orobanchaceae Dixon's paintbrush saltwater shores May, Jun, Jul, Aug
Castilleja miniata var. miniata Orobanchaceae scarlet paintbrush western forest; eastern forest; subalpine or alpine May, Jun, Jul, Aug, Sep
Catalpa speciosa * Bignoniaceae northern catalpa disturbed areas May, Jun
Ceratophyllum echinatum Ceratophyllaceae spineless hornwort freshwater Jun, Jul, Aug
Cuscuta pacifica var. pacifica Convolvulaceae Pacific dodder
Dichelostemma congestum Asparagaceae ookow; northern saitas prairie or bald; shrub-steppe May, Jun
Draba nemorosa * Brassicaceae woods draba; woodland whitlow-grass disturbed areas Mar, Apr, May
Empetrum nigrum Ericaceae crowberry subalpine or alpine; freshwater May, Jun, Jul
Erythranthe grandis Phrymaceae large monkey-flower freshwater; saltwater shores May, Jun, Jul, Aug
Euphorbia maculata * Euphorbiaceae sandmat; milk spurge; spotted spurge western forest; eastern forest; shrub-steppe; disturbed areas Jun, Jul, Aug, Sep
Fritillaria camschatcensis Liliaceae black lily; Indian rice western forest; freshwater May, Jun, Jul
Geum triflorum Rosaceae prairie smoke; old-man's whiskers eastern forest; subalpine or alpine; prairie or bald; shrub-steppe Apr, May, Jun, Jul, Aug
Glehnia leiocarpa Apiaceae American glehnia saltwater shores May, Jun, Jul
Glyceria elata Poaceae tall mannagrass freshwater Jun, Jul, Aug
Hemitomes congestum Ericaceae coneplant; gnome-plant western forest Jun, Jul, Aug
Heterotheca villosa Asteraceae hairy goldaster eastern forest; shrub-steppe Jun, Jul, Aug, Sep
Heterotheca villosa var. villosa Asteraceae hairy goldaster; hairy goldenaster Jun, Jul, Aug, Sep
Hieracium scouleri Asteraceae hound-tongue hawkweed; Scouler's hawkweed western forest; eastern forest; prairie or bald Jun, Jul, Aug
Iris missouriensis Iridaceae western blue flag; Rocky Mountain iris freshwater May, Jun, Jul
Isolepis cernua Cyperaceae low club-rush saltwater shores Jun, Jul, Aug
Isolepis setacea * Cyperaceae Eurasian bulrush; bristle-leaf sedge freshwater; saltwater shores; disturbed areas
Juniperus communis var. kelleyi Cupressaceae Kelley's common juniper; Kelley's mat juniper Apr, May
Lathyrus littoralis Fabaceae beach peavine; silky beach vetchling saltwater shores May, Jun, Jul
Lithospermum ruderale Boraginaceae eastern forest; shrub-steppe Apr, May, Jun
Lysimachia maritima Primulaceae sea milkwort shrub-steppe; saltwater shores Apr, May, Jun
Lythrum salicaria * Lythraceae purple loosestrife; long purples freshwater Jul, Aug, Sep
Malva moschata * Malvaceae musk mallow disturbed areas May, Jun, Jul
Meconella oregana Papaveraceae white fairy-poppy prairie or bald Mar, Apr
Nepeta cataria * Lamiaceae catnip freshwater; disturbed areas Jun, Jul, Aug, Sep
Oenothera biennis * Onagraceae King's-cureall freshwater; disturbed areas Jun, Jul, Aug
Oxybasis rubra Amaranthaceae red goosefoot freshwater; saltwater shores Jun, Jul, Aug
Panicum dichotomiflorum * Poaceae fall panicum freshwater; disturbed areas May, Jun, Jul, Aug, Sep
Parapholis incurva * Poaceae sicklegrass saltwater shores; disturbed areas Jun, Aug
Pascopyrum smithii Poaceae western wheatgrass eastern forest; shrub-steppe Jun, Jul, Aug
Phragmites australis Poaceae common reed freshwater; disturbed areas Jul, Aug, Sep
Plantago coronopus * Plantaginaceae buck-horn plantain saltwater shores; disturbed areas May, Jun, Jul, Aug, Sep, Oct
Plectritis brachystemon Valerianaceae western forest; eastern forest; prairie or bald Apr, May, Jun
Poa macrantha Poaceae sand-dune bluegrass saltwater shores Apr, May, Jun, Jul
Polygonum paronychia Polygonaceae beach knotweed; black knotweed saltwater shores May, Jun, Jul, Aug, Sep
Potamogeton richardsonii Potamogetonaceae clasping-leaved pondweed; Richardson's pondweed freshwater Jun, Jul, Aug
Puccinellia pumila Poaceae small alkaligrass saltwater shores Jun, Jul, Aug
Ranunculus sceleratus var. sceleratus * Ranunculaceae celery-leaved buttercup May, Jun, Jul, Aug, Sep
Raphanus sativus * Brassicaceae garden radish; radish disturbed areas May, Jun, Jul
Rhododendron macrophyllum Ericaceae California rhododendron; Pacific rhododendron western forest May, Jun, Jul
Rosa pisocarpa Rosaceae clustered rose; peafruit rose western forest; freshwater May, Jun, Jul
Sericocarpus rigidus Asteraceae Columbian white-topped aster; Columbian whitetop aster; rigid white-topped aster; white-topped aster western forest; prairie or bald Jul, Aug
Silene noctiflora * Caryophyllaceae night-flowering catchfly disturbed areas Jun, Jul, Aug
Solanum rostratum * Solanaceae buffalo bur; horned nightshade disturbed areas Jun, Jul, Aug, Sep
Spartina anglica * Poaceae English cordgrass saltwater shores Jul, Aug, Sep
Spartina densiflora * Poaceae Chilean cordgrass saltwater shores Jul, Aug, Sep
Spergularia bocconei * Caryophyllaceae Bocconi's sandspurry saltwater shores; disturbed areas
Streptopus amplexifolius Liliaceae cucumber root; clasp-leaf twisted-stalk; clasping twisted-stalk western forest; eastern forest; subalpine or alpine; freshwater May, Jun, Jul
Trifolium glomeratum * Fabaceae clustered clover disturbed areas Apr, May, Jun
Veronica hederifolia * Plantaginaceae ivy-leaf speedwell disturbed areas Apr, May, Jun
Viburnum tinus * Adoxaceae laurustinus western forest Apr, May, Jun
Vicia villosa var. villosa * Fabaceae hairy vetch; winter vetch; woolly vetch

Generated on 2025-03-15.   Data from Consortium of PNW Herbaria and Burke Herbarium Image Collection.

More information on the PlantQuest Image Project can be found at https://burkeherbarium.org/imagecollection/plantquest.php.