Hoyt Arboretum, Portland, Oregon, USA
Hoyt Arboretum, Portland, Oregon, USA
Hoyt Arboretum, Portland, Oregon, USA
Plant Database
Search
Map
Names
Features
Tours
English
Français
Names
Choose a letter to see scientific names:
Found
R: 110 names
Ranunculus acris
• Ranunculaceae • meadow buttercup, tall buttercup
Ranunculus aquatilis
• Ranunculaceae • water buttercup, white water crowfoot, whitewater crowfoot
Ranunculus ficaria
• Ranunculaceae
Ranunculus flammula
• Ranunculaceae • creeping buttercup, lesser spearwort
Ranunculus repens
• Ranunculaceae • creeping buttercup
Ratibida columnifera 'Red Midget'
• Asteraceae • dwarf red Mexican hat
Rehderodendron macrocarpum
• Styracaceae
Rhamnus alaternus 'Variegata'
• Rhamnaceae • Italian buckthorn
Rhamnus alpina
• Rhamnaceae
Rhamnus californica 'Eve Case' (syn.)
• Rhamnaceae • California buckthorn, California coffeeberry
Rhamnus cathartica
• Rhamnaceae • Common Buckthorn, Carolina buckthorn, European buckthorn, European waythorn, Hart's thorn, nerprun cathartique
Rhamnus frangula (syn.)
• Rhamnaceae • Alder Buckthorn, alder buckthorn, glossy buckthorn
Rhamnus japonica 'Pygmaea'
• Rhamnaceae • Japanese buckthorn
Rhapidophyllum hystrix
• Arecaceae • Needle Palm
Rhinanthus minor
• Orobanchaceae • yellow rattle, little yellow rattle
Rhododendron alabamense
• Ericaceae • Alabama azalea
Rhododendron 'Annie E. Endtz'
• Ericaceae
Rhododendron anthosphaerum
• Ericaceae
Rhododendron arborescens
• Ericaceae
Rhododendron arboreum ssp. zeylanicum
• Ericaceae
Rhododendron argipeplum
• Ericaceae
Rhododendron atlanticum
• Ericaceae • dwarf azalea
Rhododendron augustinii
• Ericaceae
Rhododendron austrinum
• Ericaceae • Florida azalea
Rhododendron campanulatum ssp. aeruginosum
• Ericaceae
Rhododendron concinnum
• Ericaceae
Rhododendron dauricum
• Ericaceae
Rhododendron eastmanii
• Ericaceae
Rhododendron falconeri ssp. eximium
• Ericaceae
Rhododendron falconeri subsp. eximium
• Ericaceae
Rhododendron flammeum
• Ericaceae
Rhododendron floribundum
• Ericaceae
Rhododendron 'Gene'
• Ericaceae
Rhododendron 'Geraldii'
• Ericaceae
Rhododendron molle
• Ericaceae • Chinese Azalea
Rhododendron mucronulatum
• Ericaceae
Rhododendron 'Multimaculatum'
• Ericaceae
Rhododendron occidentale
• Ericaceae • western azalea, California azalea, Sonoma azalea
Rhododendron periclymenoides
• Ericaceae
Rhododendron prinophyllum
• Ericaceae
Rhododendron racemosum
• Ericaceae
Rhododendron rex ssp. rex
• Ericaceae
Rhododendron sp
• Ericaceae
Rhododendron sp. subsection Falconera
• Ericaceae
Rhododendron ungernii
• Ericaceae
Rhododendron vaseyi White Find
• Ericaceae
Rhododendron viscosum
• Ericaceae
Rhododendron yakushimanum 'Ken Janeck'
• Ericaceae
Rhododendron yakushimanum 'Yaku Princess'
• Ericaceae
Rhododendron zaleucum
• Ericaceae
Rhodoleia parvipetala
• Hamamelidaceae
Rhus chinensis
• Anacardiaceae
Rhus chinensis var. roxburghii
• Anacardiaceae
Rhus glabra
• Anacardiaceae
Rhus ovata
• Anacardiaceae • sugar bush
Rhus pulvinata
• Anacardiaceae
Rhus typhina
• Anacardiaceae
Rhus typhina 'Laciniata'
• Anacardiaceae
Ribes × gordonianum
• Grossulariaceae • flowering currant
Ribes aureum
• Grossulariaceae • golden currant
Ribes aureum subsp. gracillimum
• Grossulariaceae
Ribes cereum
• Grossulariaceae • white field currant
Ribes davidii
• Grossulariaceae • currant
Ribes divaricatum var. pubiflorum
• Grossulariaceae • Coast Goose Berry, straggly gooseberry
Ribes malvaceum 'Dancing Tassels'
• Grossulariaceae • chaparral currant
Ribes roezlii
• Grossulariaceae • Roezl's Gooseberry
Ribes sanguineum
• Grossulariaceae • red flowering currant
Ribes sanguineum 'Brocklebankii'
• Grossulariaceae • Winter Current
Ribes sanguineum 'Strybing Pink'
• Grossulariaceae
Ribes sanguineum 'Variegata'
• Grossulariaceae
Ribes sanguineum 'White Icicle'
• Grossulariaceae
Ribes speciosum
• Grossulariaceae
Ribes viburnifolium
• Grossulariaceae • evergreen currant
Robinia pseudoacacia
• Fabaceae • Black Locust
Rodgersia pinnata 'Fireworks'
• Saxifragaceae
Romneya trichocalyx
• Papaveraceae • bristly Matilija poppy
Rorippa curvisiliqua
• Brassicaceae
Rosa canina
• Rosaceae • dog rose
Rosa giraldii
• Rosaceae
Rosa gymnocarpa
• Rosaceae • wood rose, dwarf rose
Rosa moschata
• Rosaceae
Rosa multiflora
• Rosaceae • multiflora rose
Rosa nutkana var. nutkana
• Rosaceae
Rosa pisocarpa subsp. pisocarpa
• Rosaceae • cluster rose
Rosa rugosa
• Rosaceae • Japanese Rose
Rosa rugosa 'Alba'
• Rosaceae • Turkestan rose, Japanese rose, rugose rose, rugosa rose
Rosa rugosa 'Hansa'
• Rosaceae
Rosa rugosa 'Magnifica'
• Rosaceae
Rosa taronensis
• Rosaceae
Rosa 'Veterans Honor'
• Rosaceae
Rostrinucula sinensis
• Lamiaceae
Rubus armeniacus
• Rosaceae • Armenian blackberry, Himalayan blackberry, Himalayan berry
Rubus bambusarum
• Rosaceae • Bamboo-leaved Raspberry
Rubus bifrons (syn.)
• Rosaceae • Armenian blackberry, Himalayan blackberry, Himalayan berry
Rubus irenaeus
• Rosaceae • bigleaf raspberry
Rubus laciniatus
• Rosaceae • cut-leaved blackberry, cutleaf blackberry
Rubus leucodermis
• Rosaceae • western raspberry, whitebark raspberry
Rubus parviflorus
• Rosaceae • western thimbleberry, thimbleberr
Rubus praecox
• Rosaceae • European blackberry
Rubus rolfei
• Rosaceae • creeping raspberry
Rubus spectabilis
• Rosaceae • Salmonberry, Salmonberry
Rubus spectabilis Double-Flowered Group
• Rosaceae
Rubus ursinus
• Rosaceae • trailing blackberry, Pacific blackberry, Pacific dewberry
Rumex acetosella
• Polygonaceae • sheep sorrel, field sorrel, red sorrel, common sheep sorrel
Rumex salicifolius
• Polygonaceae • willow dock
Ruscus hypoglossum
• Asparagaceae
Ruta chalepensis 'Dimension Two'
• Rutaceae
Ruta graveolens
• Rutaceae • Rue
Ruta graveolens 'Jackman's Blue'
• Rutaceae • Herb of Grace
Ruta graveolens 'Variegata'
• Rutaceae