United States

Black Haw

Viburnum lentago

blackheaded fireworm, Holly Tortrix

Rhopobota naevana

Black-headed Grosbeak

Pheucticus melanocephalus

Blackhead worm

Aporrectodea longa

Black hellebore

Helleborus niger

Black Hemlock

Tsuga canadensis

Black Henbane

Hyoscyamus niger

Black Horehound

Ballota nigra

Black-Horned Gem

Microchrysa polita

Black-Horned Smoothtail

Epistrophe grossulariae

Black Huckleberry

Gaylussacia baccata

Black ironbox

Eucalyptus raveretiana

Blackish Puffball

Lycoperdon nigrescens

Blackish-Purple Russula

Russula atropurpurea

Black Knapweed

Centaurea nigra

Black Knot

Apiosporina morbosa

Black larder beetle

Dermestes ater

Black Leaf

Apiosporina collinsii

Black-Lined Periwinkle

Littorina saxatilis

black line scale

Ischnaspis longirostris

Black Locust

Robinia pseudoacacia

Black Locust Leafminer

Macrosaccus robiniella

Black Medic

Medicago lupulina

Black mimosa

Mimosa pigra

Black Morel

Morchella elata

Black Morel

Morchella angusticeps

Black Mulberry

Morus nigra

Black Mustard

Brassica nigra

Black Nightshade

Solanum nigrum

Black Oak

Quercus velutina

Black-On-Black Crust Lichen

Orphniospora moriopsis

Black-Palped Jumping Spider

Pseudeuophrys erratica

Argentine evening primrose

Oenothera mollissima

Argentine pepperweed

Lepidium bonariense

Argentine senna

Senna corymbosa

Argent & Sable

Rheumaptera hastata

Argid Sawfly

Arge ochropus

Argyle apple

Eucalyptus cinerea

Arkansas Grape

Vitis aestivalis

Arnold Hawthorn

Crataegus mollis

Aroma

Dichrostachys cinerea

Aromatic Knight

Tricholoma lascivum

Aromatic Sumac

Rhus aromatica

Arrhenia epichysium

Arrocillo

Paspalum paniculatum

Arrow Arum

Peltandra virginica

Arrow bamboo

Pseudosasa japonica

Arrow Clubtail

Stylurus spiniceps

Arrow-Grass

Triglochin maritima

Arrowhead Spiketail

Cordulegaster obliqua

Arrowleaf butterfly pea

Centrosema sagittatum

Arrowleaf clover

Trifolium vesiculosum

Arrowleaf elephant's ear

Xanthosoma sagittifolium

Arrowleaf sida

Sida rhombifolia

Arrowroot

Maranta arundinacea

Arrow-Wood

Viburnum dentatum

Arsenic bush

Senna septemtrionalis

Artemisia

Artemisia vulgaris

Athel tamarisk

Tamarix aphylla

athenarian burrowing anemone

Nematostella vectensis