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Hardiness & climate
Cold-hardy (zone 4a or colder)
Taxa whose minimum survivable temperature is −30 °F or lower — suitable for hardiness zone 4a and colder. The Upper Plains, northern New England, the Mountain West interior.
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- max_temperature_f=-30
Showing 651–700 of 856.
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Quercus stellata Wangenh. QUSTpost oak · Fagaceae -
Quercus velutina Lam. QUVEblack oak · Fagaceae -
Ranunculus abortivus L. RAABlittleleaf buttercup · Ranunculaceae -
Ranunculus alismifolius Geyer ex Benth. RAALplantainleaf buttercup · Ranunculaceae -
Ranunculus cymbalaria Pursh RACYalkali buttercup · Ranunculaceae -
Ranunculus eschscholtzii Schltdl. RAESEschscholtz's buttercup · Ranunculaceae -
Ranunculus flammula L. RAFL2greater creeping spearwort · Ranunculaceae -
Ranunculus glaberrimus Hook. RAGLsagebrush buttercup · Ranunculaceae -
Ranunculus hispidus Michx. RAHIbristly buttercup · Ranunculaceae -
Ranunculus hyperboreus Rottb. RAHY2high northern buttercup · Ranunculaceae -
Ranunculus macounii Britton RAMA2Macoun's buttercup · Ranunculaceae -
Ratibida columnifera (Nutt.) Wooton & Standl. RACO3upright prairie coneflower · Asteraceae -
Ratibida pinnata (Vent.) Barnhart RAPIpinnate prairie coneflower · Asteraceae -
Rhamnus alnifolia L'Hér. RHALalderleaf buckthorn · Rhamnaceae -
Rhododendron lapponicum (L.) Wahlenb. RHLA2Lapland rosebay · Ericaceae -
Rhus glabra L. RHGLsmooth sumac · Anacardiaceae -
Rhus trilobata Nutt. RHTRskunkbush sumac · Anacardiaceae -
Rhus typhina L. RHTYstaghorn sumac · Anacardiaceae -
Ribes americanum Mill. RIAM2American black currant · Grossulariaceae -
Ribes aureum Pursh RIAUgolden currant · Grossulariaceae -
Ribes aureum Pursh var. villosum DC. RIAUVgolden currant · Grossulariaceae -
Ribes hudsonianum Richardson RIHUnorthern black currant · Grossulariaceae -
Ribes lacustre (Pers.) Poir. RILAprickly currant · Grossulariaceae -
Ribes triste Pall. RITRred currant · Grossulariaceae -
Ribes viscosissimum Pursh RIVI3sticky currant · Grossulariaceae -
Robinia pseudoacacia L. ROPSblack locust · Fabaceae -
Rorippa sinuata (Nutt.) Hitchc. ROSI2spreading yellowcress · Brassicaceae -
Rosa acicularis Lindl. ROACprickly rose · Rosaceae -
Rosa carolina L. ROCA4Carolina rose · Rosaceae -
Rosa palustris Marshall ROPAswamp rose · Rosaceae -
Rosa rubiginosa L. RORU82sweetbriar rose · Rosaceae -
Rosa rugosa Thunb. RORUrugosa rose · Rosaceae -
Rosa woodsii Lindl. ROWOWoods' rose · Rosaceae -
Rubus arcticus L. RUARarctic raspberry · Rosaceae -
Rubus chamaemorus L. RUCHcloudberry · Rosaceae -
Rubus hispidus L. RUHIbristly dewberry · Rosaceae -
Rubus idaeus L. RUIDAmerican red raspberry · Rosaceae -
Rubus idaeus L. ssp. strigosus (Michx.) Focke RUIDS2grayleaf red raspberry · Rosaceae -
Rubus laciniatus Willd. RULAcutleaf blackberry · Rosaceae -
Rubus odoratus L. RUODpurpleflowering raspberry · Rosaceae -
Rubus spectabilis Pursh RUSPsalmonberry · Rosaceae -
Rudbeckia laciniata L. RULA3cutleaf coneflower · Asteraceae -
Ruellia humilis Nutt. RUHUfringeleaf wild petunia · Acanthaceae -
Rumex arcticus Trautv. RUAR6arctic dock · Polygonaceae -
Rumex maritimus L. RUMA4golden dock · Polygonaceae -
Sagina saginoides (L.) Karst. SASAarctic pearlwort · Caryophyllaceae -
Sagittaria cuneata Sheldon SACUarumleaf arrowhead · Alismataceae -
Sagittaria latifolia Willd. SALA2broadleaf arrowhead · Alismataceae -
Salix alba L. SAAL2white willow · Salicaceae -
Salix amygdaloides Andersson SAAM2peachleaf willow · Salicaceae