United States

Calla lily

Zantedeschia aethiopica

Calocera glossoides

Calogaya decipiens

Caloneis permagna

Calothrix parietina

Calycina vulgaris

Cambridge Milk-Parsley

Selinum carvifolia

Camellia

Camellia japonica

Campernelle jonquil

Narcissus odorus

Campylopus moss

Campylopus pilifer

Canada Beadruby

Maianthemum canadense

Canada Bluegrass

Poa compressa

Canada Cinquefoil

Potentilla canadensis

Canada Darner

Aeshna canadensis

Canada Goldenrod

Solidago altissima

Canada Honewort

Cryptotaenia canadensis

Canada Redbud

Cercis canadensis

Canada Rhododendron

Rhododendron canadense

Catberry

Ilex mucronata

Catchfly

Silene antirrhina

Caterpillar-plant

Scorpiurus muricatus

Cathedral bells

Kalanchoe pinnata

Catnip

Nepeta cataria

Cat'S Ear

Hypochaeris radicata

Cattail bug

Chilacis typhae

cat-tongue liverwort

Conocephalum salebrosum

Caucasian bluestem

Bothriochloa bladhii

Caucasus catmint

Nepeta grandiflora

Cauliflower Foam Lichen

Stereocaulon botryosum

Cave cobweb spider

Nesticella mogera

Cave cobweb spider

Eidmannella pallida

cavernous crystalwort

Riccia cavernosa

Cayenne porterweed

Stachytarpheta cayennensis

carline thistle

Carlina vulgaris

Carmine spider mite

Tetranychus urticae

Carnation

Dianthus caryophyllus

Carnival Candy Slime Mold

Arcyria denudata

Carolina bristlemallow

Modiola caroliniana

Carolina Buckthorn

Frangula caroliniana

Carolina Hornwort

Phaeoceros carolinianus

Carolina Lovegrass

Eragrostis pectinacea

Carolina mosquitofern

Azolla caroliniana

Carolina Rose

Rosa carolina

Carolina Saddlebags

Tramea carolina

Carolina Shield Lichen

Canoparmelia caroliniana

Carolina Wren

Thryothorus ludovicianus

Carolina Yellow-Eyed-Grass

Xyris caroliniana

Carpenter'S Figwort

Scrophularia marilandica

Carpet Box

Pachysandra terminalis

Carrion-Flower

Smilax herbacea

Carrot bur parsley

Caucalis platycarpos

Carrot-Fern

Conium maculatum

Carrot Seed Moth

Sitochroa palealis

carrot-willow aphid

Cavariella aegopodii

carthusian pink

Dianthus carthusianorum

Carthusian snail

Monacha cartusiana

Caruana's slug

Deroceras invadens

Cascade Mountain-Ash

Sorbus scopulina

Case-bearer moth

Coleophora colutella

Case'S Ladies' Tresses

Spiranthes casei