Seeds Prohibited Entry into the U.S. - B's.
| Botanical Name | Authority |
|---|---|
| Baccharis vanessae | ESA-T |
| Backbergia (= Pachycereus) militaris | CITES |
| Bakerella spp. | Parasitic |
| Balanophora spp. | Parasitic |
| Balfourodendron spp. | NAPPRA |
| Balmea stormiae | CITES |
| Balsamocitrus spp. | NAPPRA |
| Bambusa spp. | NAPPRA |
| Bambusae tribe | NAPPRA |
| Banara vanderbiltii | ESA-E |
| Baptisia arachnifera | ESA-E |
| Barathranthus spp. | Parasitic |
| Barbarea verna | FSA-V |
| Bardotia spp. | Parasitic |
| Barosma spp. | Rut. |
| Bartsia spp. | Parasitic |
| Bartsiella spp. | Parasitic |
| Bassia prostrata | FSA-A |
| Baumia spp. | Parasitic |
| Bdallophytum ssp. | Parasitic |
| Beaucarnea spp. | Parasitic |
| Bellarida spp. | Parasitic |
| Benthamina spp. | Parasitic |
| Berberis spp. | NAPPRA |
| Berberis nevinii | ESA-E |
| Berberis pinnata ssp. insularis | ESA-E |
| Bergera spp. | NAPPRA |
| Berhautia spp. | Parasitic |
| Berkheya rigida | NAPPRA |
| Beta vulgaris ssp. vulgaris | FSA-V |
| Betula uber | ESA-T |
| Bidens amplectans | ESA-E |
| Bidens campylotheca ssp. Waihoiensis | ESA-E |
| Bidens conjuncta | ESA-E |
| Bidens hillebrandiana ssp. hillebrandiana | ESA-E |
| Bidens micrantha ssp. ctenophylla; also ssp. kalealaha | ESA-E |
| Bidens subalternans | NAPPRA |
| Bidens wiebkei | ESA-E |
|
Blennosperma bakeri |
ESA-E |
| Boechera serotina | ESA-E |
| Boenninghausenia spp. | NAPPRA |
| Boltonia decurrens | ESA-T |
| Bonamia grandiflora | ESA-T |
| Bonamia menziesii | ESA-E |
| Bonia (= Bambusa) spp. | NAPPRA |
| Boninia spp. | NAPPRA |
|
Borinda spp. |
NAPPRA |
| Bornmuellerantha spp. | Parasitic |
| Boronia spp. | NAPPRA |
| Borreria (= Spermacoce) alata | NW |
| Boschniakia spp. | Parasitic |
| Bosistoa spp. | NAPPRA |
| Bothriochloa spp. | NAPPRA |
| Bottegoa spp. | NAPPRA |
| Bouchardatia spp. | NAPPRA |
| Bouteloua curtipendula | FSA-A |
| Bouteloua dactyloides | FSA-A |
| Bouteloua gracilis | FSA-A |
| Bouzetia spp. | NAPPRA |
| Brachlaria ramose | FSA-A |
| Brachynema spp. | Parasitic |
| Brachystachyum (= Semiarundinaria) spp. | NAPPRA |
| Brachystigma spp. | Parasitic |
| Brandisia spp. | Parasitic |
| Brassica juncea | FSA-A,FSA-V |
| Brassica napus (incl.var. annua, biennis) | FSA-A |
| Brassica napus v. napobrassica | FSA-A |
| Brassica napus v. pabularia | FSA-A |
| Brassica nigra | FSA-A |
| Brassica oleracea v. acephala | FSA-V |
| Brassica oleracea v. alboglabra | FSA-V |
| Brassica oleracea v. botrytis; v. capitata; v. costata | FSA-V |
| Brassica oleracea v. gemmifera | FSA-V |
| Brassica oleracea v. gongylodes; v. italica | FSA-V |
| Brassica periviridis v. periviridis (syn. B. rapa ssp. nipposinica) | FSA-V |
| Brassica rapa ssp. campestris | FSA-V |
| Brassica rapa ssp. chinensis | FSA-V |
| Brassica rapa ssp. pekinensis | FSA-V |
| Brassica rapa ssp. rapa; ssp.. oleifera; ssp pekinensis; ssp. rapa | FSA-A,FSA-V |
| Brassica rapa ssp. sylvestris | FSA-A |
| Brickellia mosieri | ESA-E |
| Brighamia insignis | ESA-E |
| Brighamia rockii | ESA-E |
| Brodiaea filifolia | ESA-T |
| Brodiaea pallida | ESA-T |
| Brombya spp. | NAPPRA |
| Bromus arvensis | FSA-A |
| Bromus biebersteinii | FSA-A |
| Bromus carinatus var. marginatus | FSA-A |
| Bromus catharticus | FSA-A |
| Bromus hordeaceus | FSA-A |
| Bromus inermis | FSA-A |
| Bromus marginatus | FSA-A |
| Bromus pectinatus | NAPPRA |
|
Bruguiera gymnorhiza |
NAPPRA |
| Buchnera spp. | Parasitic |
| Buckleya spp. | Parasitic |
| Buchloe dactyloides | FSA-A |
| Buchnera spp. | Parasitic |
| Bulbophyllum guamense | ESA-T |
| Bungea spp. | Parasitic |
| Burkillanthus spp. | NAPPRA |
| Burnabambus (= Sinarundinaria) ssp. | NAPPRA |
| Butania (= Sinarundinaria) ssp. | NAPPRA |
| Buttonia spp. | Parasitic |
| Buxus vahlii | ESA-E |