United States

Agrimony

Agrimonia eupatoria

Ajuga

Ajuga reptans

Endangered

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

Ridgewinged fungus beetle

Thes bergrothi

Riffle Snaketail

Ophiogomphus carolus

Rigid Beard Moss

Didymodon rigidulus

Rigid Goldenrod

Solidago rigida

Rimmed Camouflage Lichen

Melanelia hepatizon

Rimmed Shingle Lichen

Fuscopannaria leucosticta

Rimmed Wart Lichen

Varicellaria velata

Critically Endangered

Ring-billed Gull

Larus delawarensis

Ringed Emerald

Somatochlora albicincta

ringed seal

Pusa hispida

Vulnerable

Ringed Twiglet

Tubaria confragosa

Ringlegged earwig

Euborellia annulipes

ringless spoon moss

Sarmentypnum exannulatum

Ring-necked Duck

Aythya collaris

Rio Cauca caecilian

Typhlonectes natans

Rio grande pearlhead

Isocarpha oppositifolia

Data Deficient

riparian feather moss

Leptodictyum riparium

Ripgut brome

Bromus diandrus

river bloom moss

Schistidium rivulare

River Bluet

Enallagma anna

River Bulrush

Bolboschoenus fluviatilis

Riverine Clubtail

Stylurus amnicola

River Jewelwing

Calopteryx aequabilis

River Maple

Acer saccharinum

river moss

Fontinalis hypnoides

river ragged moss

Brachythecium rivulare

River sheoak

Casuarina cunninghamiana

river thyme moss

Pseudobryum cinclidioides

Critically Endangered

Rivet wheat

Triticum turgidum

Roadside croton

Croton trinitatis

Roadside flatsedge

Cyperus sphacelatus

Roadside pepperweed

Lepidium ruderale

Roadside toadflax

Linaria aeruginea

Robbins Spikerush

Eleocharis robbinsii

Rock Axil-Bristle Lichen

Myelochroa obsessa

Rock Bushy Lichen

Ramalina intermedia

Rock Dimple Lichen

Gyalecta jenensis

Extinct

Rock Draba

Draba arabisans

Rockefeller'S Gray Crosslobes

Rockefellera crossophylla

rock feather moss

Lescuraea saxicola

Rock Foam

Stereocaulon saxatile

Rock Fumewort

Pseudofumaria lutea

Rock Greenshield

Flavoparmelia baltimorensis

Rock Jewel Lichen

Calogaya saxicola

Data Deficient

Rock-Loving Cladonia

Cladonia petrophila

Rock-Loving Map Lichen

Rhizocarpon petraeum

Vulnerable

Rock Pigeon

Columba livia

rock pocket moss

Fissidens dubius

Rock ragwort

Senecio rupestris

Rock Sedge

Carex saxatilis

Rock Shingle Lichen

Vahliella leucophaea

Extinct

Rock soapwort

Saponaria ocymoides

Rockspray

Cotoneaster horizontalis

rock veilwort

Metzgeria conjugata

rock vole

Microtus chrotorrhinus

Rock Wart Lichen

Pertusaria plittiana

Rockweed

Pilea microphylla

Roesel'S Bush Cricket

Roeseliana roeselii

Rolling Hen-And-Chicks

Sempervivum globiferum

Rollrim Milkcap

Lactarius resimus