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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 801–850 of 856.
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Thinopyrum intermedium (Host) Barkworth & D.R. Dewey THIN6intermediate wheatgrass · Poaceae -
Thinopyrum ponticum (Podp.) Z.-W. Liu & R.-C. Wang THPO7tall wheatgrass · Poaceae -
Thuja occidentalis L. THOC2arborvitae · Cupressaceae -
Thuja plicata Donn ex D. Don THPLwestern redcedar · Cupressaceae -
Tilia americana L. TIAMAmerican basswood · Tiliaceae -
Tilia cordata Mill. TICO2littleleaf linden · Tiliaceae -
Tradescantia virginiana L. TRVIVirginia spiderwort · Commelinaceae -
Tragopogon pratensis L. TRPRJack-go-to-bed-at-noon · Asteraceae -
Trichophorum cespitosum (L.) Hartm. TRCE3tufted bulrush · Cyperaceae -
Tridens strictus (Nutt.) Nash TRST2longspike tridens · Poaceae -
Trifolium ambiguum M. Bieb. TRAM15Kura clover · Fabaceae -
Trifolium fragiferum L. TRFR2strawberry clover · Fabaceae -
Trifolium hybridum L. TRHYalsike clover · Fabaceae -
Trifolium pratense L. TRPR2red clover · Fabaceae -
Trifolium repens L. TRRE3white clover · Fabaceae -
Trisetum canescens Buckley TRCA21tall trisetum · Poaceae -
Trisetum spicatum (L.) K. Richt. TRSP2spike trisetum · Poaceae -
Triteleia grandiflora Lindl. TRGR7largeflower triteleia · Liliaceae -
Tsuga canadensis (L.) Carrière TSCAeastern hemlock · Pinaceae -
Typha angustifolia L. TYANnarrowleaf cattail · Typhaceae -
Typha latifolia L. TYLAbroadleaf cattail · Typhaceae -
Ulmus americana L. ULAMAmerican elm · Ulmaceae -
Ulmus pumila L. ULPUSiberian elm · Ulmaceae -
Ulmus rubra Muhl. ULRUslippery elm · Ulmaceae -
Ulmus thomasii Sarg. ULTHrock elm · Ulmaceae -
Utricularia minor L. UTMIlesser bladderwort · Lentibulariaceae -
Vaccinium angustifolium Aiton VAANlowbush blueberry · Ericaceae -
Vaccinium cespitosum Michx. VACEdwarf bilberry · Ericaceae -
Vaccinium corymbosum L. VACOhighbush blueberry · Ericaceae -
Vaccinium membranaceum Douglas ex Torr. VAMEthinleaf huckleberry · Ericaceae -
Vaccinium ovalifolium Sm. VAOVoval-leaf blueberry · Ericaceae -
Vaccinium uliginosum L. VAULbog blueberry · Ericaceae -
Vaccinium vitis-idaea L. VAVIlingonberry · Ericaceae -
Vallisneria americana Michx. VAAM3American eelgrass · Hydrocharitaceae -
Veratrum californicum Durand VECA2California false hellebore · Liliaceae -
Vernonia missurica Raf. VEMI2Missouri ironweed · Asteraceae -
Vernonia noveboracensis (L.) Michx. VENONew York ironweed · Asteraceae -
Veronica americana Schwein. ex Benth. VEAM2American speedwell · Scrophulariaceae -
Viburnum edule (Michx.) Raf. VIEDsquashberry · Caprifoliaceae -
Viburnum lantana L. VILAwayfaringtree · Caprifoliaceae -
Viburnum lantanoides Michx. VILA11hobblebush · Caprifoliaceae -
Viburnum lentago L. VILEnannyberry · Caprifoliaceae -
Viburnum nudum L. var. cassinoides (L.) Torr. & A. Gray VINUCwithe-rod · Caprifoliaceae -
Viburnum opulus L. VIOPEuropean cranberrybush · Caprifoliaceae - Viburnum opulus L. var. americanum Aiton VIOPA2American cranberrybush · Caprifoliaceae
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Viburnum prunifolium L. VIPRblackhaw · Caprifoliaceae -
Viburnum rafinesqueanum Schult. VIRAdowny arrowwood · Caprifoliaceae -
Vicia americana Muhl. ex Willd. VIAMAmerican vetch · Fabaceae -
Vicia cracca L. VICRbird vetch · Fabaceae -
Vicia villosa Roth VIVIwinter vetch · Fabaceae