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Index by Common Names

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Red-berried Elder
Sambucus racemosa var. racemosa
Rhubarb, Ornamental
Rheum ‘Ace of Hearts’
Red-berried Greenbrier
Smilax walteri
Rhubarb, White
Heracleum mantegazzianum
Red-cypress
Taxodium distichum
Rhubarb, Wild
Rumex hymenosepalus
Red-cypress, Tidewater
Taxodium distichum
Rice
Oryza sativa ‘Red Dragon’
Red-hot-poker, Blue-leaved
Kniphofia caulescens
Rice Button Aster
Symphyotrichum dumosum
Red-stem Aster
Symphyotrichum puniceum
Rickrack Cactus
Epiphyllum anguliger
Redberry Elder
Sambucus racemosa var. racemosa
Ring Lichen
Evernia mesomorpha
Redbud, Eastern
Cercis canadensis
Ringless Honey Mushroom
Armillaria tabescens
Redcedar, Eastern
Juniperus virginiana
River Birch
Betula nigra ‘Dura heat’
Redgum
Liquidambar styraciflua
River Birch
Betula nigra
Redhot Poker
Kniphofia uvaria
River Maple
Acer saccharinum
Redleg
Polygonum persicaria
Road Kill Cactus
Consolea rubescens
Redstem
Erodium cicutarium
Roadside Sand-spurry
Spergularia rubra
Redtop Panicgrass
Panicum rigidulum
Robert Geranium
Geranium robertianum
Redwhisker Clammyweed
Polanisia dodecandra
Robert, Herb
Geranium robertianum
Redwood, California
Sequoia sempervirens
Robin, Ragged
Lychnis flos-cuculi
Redwood, Coast
Sequoia sempervirens
Robin, Red
Geranium robertianum
Redwood, Dawn
Metasequoia glyptostroboides
Robin, Red
Photinia ×fraseri
Redwood, Giant
Sequoia sempervirens
Robin, Wake
Trillium vaseyi
Redwood, Sierra
Sequoiadendron giganteum
Robin, Wake
Arisaema triphyllum
Reed, Arundo
Arundo donax
Rock Bells
Aquilegia canadensis
Reed, Bur
Sparganium americanum
Rock Lily
Aquilegia canadensis
Reed, Common
Phragmites australis
Rock Polypody
Polypodium virginianum
Reed, Cooper’s
Typha latifolia
Rock Samphire
Crithmum maritimum
Reed, Giant
Arundo donax ‘Variegata’
Rocket, Dames
Hesperis matronalis
Reedmace, Great
Typha latifolia
Rocket, Dame’s
Hesperis matronalis
Regal Lily
Lilium regale
Rocket, Sea
Cakile edentula
Reindeer Lichen
Cladina rangiferina
Rocket, Winter
Barbarea vulgaris
Reindeer Lichen
Cladina mitis
Rocket, Wound
Barbarea vulgaris
Reindeer Moss
Cladina rangiferina
Rocket, Yellow
Barbarea vulgaris
Reishi
Ganoderma tsugae
Rocketcress
Barbarea vulgaris
Resinous Polypore
Ischnoderma resinosum
Rocketcress, Yellow
Barbarea vulgaris
Resurrection Fern
Pleopeltis polypodioides
Rockspray Cotoneaster
Cotoneaster horizontalis var. perpusillus
Rhexia-leaved Paintbrush
Castilleja rhexiifolia
Rocky Mountain Beeplant
Cleome serrulata
Rhododendon, Great
Rhododendron maximum
Rod, Aaron’s
Thermopsis villosa
Rhododendron
Rhododendron ‘Crete’
Rojo, Gengibre
Alpinia purpurata
Rhododendron, American
Rhododendron maximum
Rojo, Gengibre
Alpinia purpurata cv. ‘Tahitian Ginger’
Rhododendron, Big
Rhododendron maximum
Roman-wormwood
Ambrosia artemisiifolia
Rhododendron, Catawba
Rhododendron catawbiense
Root, Beaver
Nymphaea odorata
Rhododendron, Great
Rhododendron maximum
Root, Bowman’s
Gillenia trifoliata ‘Pink Profusion’
Rhododendron, Pennsylvania
Rhododendron × pennsylvanicum
Root, Bowman’s
Gillenia trifoliata
Rhododendron, Rosebay
Rhododendron maximum
Root, Culver’s
Veronicastrum virginicum
Rhododendron, Smirnow
Rhododendron smirnowii
Root, Mandrake
Podophyllum peltatum
Rhodora
Rhododendron canadense
Root, Pleurisy
Asclepias tuberosa
Rhombic Copperleaf
Acalypha rhomboidea
Root, Red
Ceanothus americanus
Rhombic Three-seeded Mercury
Acalypha rhomboidea
Rooting Shank
Xerula radicata
Rhomboid Mercury
Acalypha rhomboidea
Rosa, Rugosa
Rosa rugosa
Rhubarb, Guatemala
Jatropha podagrica
Rose
Rosa
Rhubarb, Himalayan
Rheum australe
Rose Milkweed
Asclepias incarnata
Rhubarb, Ornamental
Rheum palmatum var. tanguticum ‘Red Selection’
Rose Pogonia
Pogonia ophioglossoides