Common Name

Scientific Name

Common Name

Scientific Name

Radish

Raphanus sativus

Rocky Mountain juniper

Juniperus scopulorum

Rafflesia

Rafflesia arnoldii

Rose, Cherokee

Rosa sinica

Ragweed

Ambrosia artemisiifolia

Rose, prairie

Rosa pranticola

Rambutan

Nephelium lapaceum

Rose, wild prairie

Rosa arkansana

Raspberry

Rubus idaeus

Rose-colored yeast

Sporobolomyces roseus

Raspberry, black

Rubus occidentalis

Rose moss

Portulaca grandiflora

Rattan palms

Calamus spp.

Rose of Sharon

Hibiscus syriacus

Red alder

Alnus rubra

Rosemary

Rosmarinus officinalis

Red algae

Bangia spp.

Roses

Rosa spp.

Red algae

Cyanidium spp.

Rounded earthstar

Geastrum saccatum

Red algae

Dasya spp.

Rowan

Sorbus aucuparia

Red algae

Gelidium spp.

Royal fern

Osmunda regalis

Red algae

Gracilaria spp.

Royal palm

Roystonea regia

Red algae

Porphyra spp.

Royal paulownia

Paulownia tomentosa

Red algae, coralline

Porolithon craspedium

Royal water lily

Victoria amazonica

Red cedar, eastern

Juniperus virginiana

Rubber plant, India

Ficus elastica

Red clover

Trifolium pratense

Rue

Ruta graveolens

Red-gilled agaric

Melanophyllum echinatum

Ruellia

Ruellia peninsularis

Red hawthorn

Crataegus spp.

Running pine

Lycopodium clavatum

Red mangrove

Rhizophora mangle

Rush

Juncus effusus

Red maple

Acer rubrum

Russian olive

Elaeagnus angustifolia

Red mulberry

Moms rubra

Russian thistle

Salsola kali

Red oak

Quercus rubra

Rust

Coleosporium tussilaginis

Red-osier dogwood

Cornus stolonifera

Rust

Gymnosporangium

Red pine

Pinus resinosa

clavariiforme

Red tide algae

Gonyaulax tamarensis

Rust, birch

Melampsoridium betulinum

Red top

Agrostis gigantea

Rust, black stem

Puccinia graminis

Redbud

Cercis canadensis

Rust, violet

Phragmidium violaceum

Redwood, coast

Sequoia sempervirens

Rutabaga

Brassica napus

Redwood, dawn

Metasequoia glyptostroboides

Rye

Secale cereale

Reindeer lichen

Cladonia rangiferina

Rhubarb

Rheum rhaponticum

Reindeer moss

Cladonia subtenuis

Rice

Oryza sativa

Resinous polypore

Ischnoderma resinosum

Rice, American wild

Zizania aquatica

Resurrection fern

Polypodium polypodioides

Ringed psathyrella

Psathyrella longistriata

Resurrection plant

Selaginella lepidophylla

River birch

Betula nigra

Rhizobium

Rhizobium spp.

Rock weed

Fucus spp.

Rhododendron

Rhododendron spp.

Rocky Mountain

Aquilegia caerulea

columbine