Bacopa rotundifolia --- disk waterhyssop
Bahia dissecta --- ragleaf bahia
Balsamita major --- costmary
Balsamorhiza hookeri --- Hooker's balsamroot
Balsamorhiza hookeri var. hispidula --- hairy balsamroot
Balsamorhiza incana --- hoary balsamroot
Balsamorhiza macrophylla --- cutleaf balsamroot
Balsamorhiza sagittata --- arrowleaf balsamroot
Balsamorhiza ×tomentosa
Barbarea orthoceras --- American yellowrocket
Barbarea vulgaris --- garden yellowrocket
Bassia hyssopifolia --- fivehorn smotherweed
Beckmannia syzigachne --- American sloughgrass
Berberis thunbergii --- Japanese barberry
Berteroa incana --- hoary false madwort
Berula erecta --- cutleaf waterparsnip
Besseya alpina --- alpine besseya
Besseya plantaginea --- White River coraldrops
Besseya wyomingensis --- Wyoming besseya
Betula nana --- dwarf birch
Betula occidentalis --- water birch
Betula papyrifera --- paper birch
Betula papyrifera var. papyrifera --- paper birch
Betula pumila --- bog birch
Betula pumila var. glandulifera --- bog birch
Betula ×utahensis
Bidens cernua --- nodding beggartick
Bidens frondosa --- devil's beggartick
Bidens tripartita --- threelobe beggarticks
Bidens vulgata --- big devils beggartick
Botrychium ascendens --- trianglelobe moonwort
Botrychium campestre --- Iowa moonwort
Botrychium crenulatum --- scalloped moonwort
Botrychium hesperium --- western moonwort
Botrychium lanceolatum --- lanceleaf grapefern
Botrychium lanceolatum var. lanceolatum --- lanceleaf grapefern
Botrychium lunaria --- common moonwort
Botrychium minganense --- Mingan moonwort
Botrychium multifidum --- leathery grapefern
Botrychium pinnatum --- northern moonwort
Botrychium simplex --- little grapefern
Botrychium virginianum --- rattlesnake fern
Bouteloua curtipendula --- sideoats grama
Bouteloua curtipendula var. curtipendula --- sideoats grama
Bouteloua eriopoda --- black grama
Bouteloua gracilis --- blue grama
Bouteloua hirsuta --- hairy grama
Bouteloua hirsuta var. hirsuta --- hairy grama
Bouteloua simplex --- matted grama
Brassica juncea --- India mustard
Brassica rapa --- field mustard
Brassica rapa var. rapa --- field mustard
Braya humilis --- low northern-rockcress
Brickellia eupatorioides --- false boneset
Brickellia eupatorioides var. chlorolepis --- false boneset
Brickellia eupatorioides var. corymbulosa --- false boneset
Brickellia grandiflora --- tasselflower brickellbush
Brickellia microphylla --- littleleaf brickellbush
Brickellia microphylla var. scabra --- rough brickellbush
Bromus briziformis --- rattlesnake brome
Bromus catharticus --- rescuegrass
Bromus ciliatus --- fringed brome
Bromus ciliatus var. ciliatus --- fringed brome
Bromus ciliatus var. richardsonii --- fringed brome
Bromus commutatus --- meadow brome
Bromus inermis --- smooth brome
Bromus inermis ssp. inermis --- smooth brome
Bromus inermis ssp. inermis var. inermis --- smooth brome
Bromus inermis ssp. pumpellianus --- Pumpelly's brome
Bromus inermis ssp. pumpellianus var. pumpellianus --- Pumpelly's brome
Bromus japonicus --- Japanese brome
Bromus latiglumis --- earlyleaf brome
Bromus marginatus --- mountain brome
Bromus polyanthus --- Great Basin brome
Bromus polyanthus var. polyanthus --- Great Basin brome
Bromus porteri --- Porter brome
Bromus pubescens --- hairy woodland brome
Bromus racemosus --- bald brome
Bromus secalinus --- rye brome
Bromus squarrosus --- corn brome
Bromus tectorum --- cheatgrass
Bromus vulgaris --- Columbia brome
Buchloe dactyloides --- buffalograss
Buglossoides arvensis --- corn gromwell
Bupleurum americanum --- American thorow wax

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