United States

Aconite

Aconitum napellus

Critically Endangered

Admiralty Island Meadow Vole (Admiraltiae)

Microtus pennsylvanicus

Agrimony

Agrimonia eupatoria

Near Threatened

Ajuga

Ajuga reptans

Endangered

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

Roman Chamomile

Chamaemelum nobile

Roman nettle

Urtica pilulifera

Roman snail

Helix pomatia

Near Threatened

Romero macho

Pectis linifolia

Roostertree

Calotropis procera

Root and stalk rot

Phytophthora tentaculata

Root aphid

Forda formicaria

Root aphid

Forda marginata

Root-eating beetle

Monotoma picipes

Rooting chainfern

Woodwardia radicans

Rooting Polypore

Polyporus radicatus

Root-maggot fly

Terellia ruficauda

Root-maggot fly

Hydrophoria lancifer

Root rot

Phytophthora quercina

Root rot

Phytophthora pseudocryptogea

Root rot

Phytophthora lateralis

Root rot

Phytophthora cinnamomi

Rorippa

Rorippa anceps

Rosarypea

Abrus precatorius

rosa scale

Aulacaspis rosae

Rose

Rosa mollis

rose aphid

Macrosiphum rosae

Roseate Skimmer

Orthemis ferruginea

Rose-Breasted Grosbeak

Pheucticus ludovicianus

Rose cactus

Pereskia grandifolia

Rose Clover

Trifolium hirtum

Rose glorybower

Clerodendrum bungei

rose-grass aphid

Metopolophium dirhodum

rose leafhopper

Edwardsiana rosae

Roseleaf raspberry

Rubus rosifolius

Roselle

Hibiscus sabdariffa

Rose monkswort

Nonea rosea

Rose Moss

Rhodobryum roseum

Rose myrtle

Rhodomyrtus tomentosa

Rose natal grass

Melinis repens

Rose-of-Sharon

Hypericum calycinum

Rose-Petalled Jellyskin Lichen

Scytinium gelatinosum

Critically Endangered

Rose Plume

Cnaemidophorus rhododactyla

Rose Pogonia

Pogonia ophioglossoides

Rose-ringed Parakeet

Psittacula krameri

Rose Rust

Phragmidium mucronatum

Rose scented geranium

Pelargonium capitatum

Rose Spindles

Clavaria rosea

Rose Stem Girdler

Agrilus cuprescens

Rosette Lichen

Physcia millegrana

Rosette Pixie-Cup Lichen

Cladonia pocillum

Critically Endangered

Rosso Coral

Ramaria botrytis

Near Threatened

Ross scale

Lindingaspis rossi

Ross Sedge

Carex rossii

rosy apple aphid

Dysaphis plantaginea

Rosy Conk

Rhodofomes cajanderi

Rosy Crust

Peniophora incarnata

Rosy Earthstar

Geastrum rufescens

Endangered

Rosy Maidenhair Fern

Adiantum hispidulum

Rosy Parachute

Marasmius pulcherripes

rosy predator snail

Euglandina rosea

Rosy sandcrocus

Romulea rosea

Rosy Saucer Lichen

Ochrolechia trochophora

Rosy sunray

Rhodanthe chlorocephala

Rosy Woodwax

Hygrophorus pudorinus