United States

Agrimony

Agrimonia eupatoria

Near Threatened

Ajuga

Ajuga reptans

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

Crescent Map Lichen

Rhizocarpon lecanorinum

crescentmarked lily aphid

Neomyzus circumflexus

Cress tooth weevil

Aulacobaris lepidii

Crested Buckler Fern

Dryopteris cristata

Crested Caracara

Caracara plancus

Crested Coral

Clavulina coralloides

Crested Dog'S-Tail

Cynosurus cristatus

Near Threatened

Crested gentian

Gentiana septemfida

Crested goosefoot

Dysphania cristata

Crested Hair Grass

Koeleria macrantha

Critically Endangered

Crested Oval Sedge

Carex cristatella

Extinct

Crested Philippine violet

Barleria cristata

Crested wartycabbage

Bunias erucago

Crested wheatgrass

Agropyron cristatum

Cretan bryony

Bryonia cretica

Cretan meadow foxtail

Alopecurus creticus

Cretin Weed

Hedypnois rhagadioloides

Crey-Cheeked Thrush

Catharus minimus

Cricket-Bat Willow

Salix alba

Crimped Gill

Plicaturopsis crispa

Crimson bottlebrush

Callistemon citrinus

Crimson Flax

Linum grandiflorum

Crimson fountaingrass

Cenchrus setaceus

Crimson-ringed Whiteface

Leucorrhinia glacialis

Crimson Waxcap

Hygrocybe punicea

Vulnerable

Crimson woodsorrel

Oxalis incarnata

Crinkled Hairgrass

Avenella flexuosa

Crispate Smoothcap Moss

Atrichum crispum

Crisped Pincushion

Ulota crispula

crisped pincushion moss

Ulota crispa

Crisp Pondweed

Potamogeton crispus

Crome Sphagnum

Sphagnum squarrosum

Crookneck Nodding-Moss

Pohlia camptotrachela

cross gentian

Gentiana cruciata

cross-leaved heath

Erica tetralix

Near Threatened

Cross Orbweaver

Araneus diadematus

Cross-Veined Troop Mushroom

Xeromphalina kauffmanii

crosswort

Cruciata laevipes

Crosswort

Lysimachia quadrifolia

Crowberry

Searsia crenata

Crowded Brittlegill

Russula densifolia

Crowded Cuplet

Merismodes fasciculata

Crowded Parchment

Stereum complicatum

Crowfoot Clubmoss

Diphasiastrum digitatum

Crow Garlic

Allium vineale

Crown Daisy

Glebionis coronaria

Crowned Earthstar

Geastrum coronatum

Critically Endangered

Crowned Pixie-Cup

Cladonia carneola

Vulnerable

Crown flower

Calotropis gigantea

Crowngrass

Paspalum pilosum

Crown-Pink

Silene coronaria

Crown Rust

Puccinia coronata

Crown-Tipped Coral Fungus

Artomyces pyxidatus

Crownvetch

Coronilla varia

Crow-Poison

Nothoscordum bivalve

Crucifer flea beetle

Phyllotreta cruciferae

Crucifer White Blister

Albugo candida

cruet dung moss

Splachnum ampullaceum

Extinct

Crumpled Rag Lichen

Platismatia tuckermanii

Cryptamorpha

Cryptamorpha desjardinsi