B

Bacca [ Botany ]

Bacteria  [ Biology ]

Bactericide   [ Chemistry - Agronomy - Phytopathology ]

Bagging  [ Horticulture ]

Ball-shaped  [ Botany ]

Barb barbed [ Botany ]

Bare-root (plant) [ Horticulture ]

Bark [ Botany ]

Barrel shaped [ Botany ]

Barrier   [ Biology - Ecology - Genetics - Agronomy - Meteorology ]

Basal [ Biology - Botany ]

Basal placentation [ Botany ]

Basally branching [ Botany ]

Base [ Biology - Botany - Chemistry - Genetics ]

Basic (chromosomes) number [ Genetics ]

Basifixed [ Botany ]

Basifixed anther [ Botany ]

Basionym [ Taxonomy ]

Bed [ Horticulture ]

Bee pollination [ Botany ]

Beetle [ Entomology ]

Bell-shaped [ Botany ]

Berry [ Botany ]

Betalain or Betacyanin [ Biochemistry - Botany ]  Biennial plants [ Botany ]

Biennial plants [ Botany ]

Bifurcate [ Botany ]

Bilateral symmetry [ Botany - Geometry ]

Bilobed [ Botany - Geometry ]

Binomial nomenclature  [ Taxonomy ]

Biochemical  [ Biology -  Chemistry ]

Biochemistry [ Biology - Physiology ]

Biocontrol agent [ Agronomy - Horticulture ]

Biodiversity [ Biology - Ecology ]

Biogeography [ Biology ]

Biologic classification [ Taxonomy ]

Biologic cultivation [ Agronomy - Horticulture ]

Biological [ Biology - Chemistry- Biochemistry - Agronomy - Horticulture]  

Biologist [ Biology ]

Biology  

Biomass [ Ecology ]

Biome [ Ecology ]

Biosphere [ Ecology ]

Biosynthesis [ Biology - Biochemistry]

Biota (Plural biotas)   [ Ecology - Taxonomy ]

Biotic   [ Ecology ]

Biotype [ Biology ]

Bipinnate [ Botany ]

Bird [ Biology - Agronomy - Horticulture ]

Bird-pollination [ Botany ]

Birth [ Biology ]

Bisexual (flower) [ Botany ]

Black spot disease [ Phytopathology ]

Blade [ Botany ]

Blights [ Botany - Phytopathology ]

Bloom [ Botany ]

Blossom [ Botany ]

Body [ Biology ]

Body fluids [ Biology - Botany ]

Body of water [ Ecology - Climatology ]

-borne ( Suffix) 

Boron [ Chemistry ]

Botanical garden [ Horticulture ]

Botanical name [ Taxonomy ]

Botanist [ Botany ]

Botany [ Biology ]

Botrytis [ Phytopatology ]

Bract [ Botany ]

Brachyblast  [ Botany ]

Bracteole or Bractlet [ Botany ]

Brain-shaped  [ Botany - Habit of growth ]

Branch [ Botany - Anatomy - Morphology]

Branching patterns [ Botany ]

Breed [ Genetics ]

Breeding [ Genetics ]

Bright shade [ Ecology - Horticulture ]

Bristle [ Botany ]

Bristle-like [ Botany ]

Broadleaf plants [ Botany ]

Brother [ Biology ]

Bud [ Botany ]

Bud mutation [ Botany - Genetics ] 

Bud trace [ Botany ]

Bud union [ Horticulture ]

Budding [ Horticulture ]

Bulb [ Botany ]

Bulbil [ Botany ]

Bullate [ Botany ]

Bush [ Botany ]

Butterfly [ Entomology ]