| Name | Structure/ Category | Description |
|---|---|---|
| Bifoliolate | [Leaves] {complexity form} | Compound with two leaflets; two-leafleted or geminate. |
| Bifurcated | A structure that is divided into two parts along some portion of its length. This often refers to petals that are deeply notched at their tips, as occurs in the flowers of Stellaria spp. (Chickweeds) and Cerastium spp. (Mouse-Eared Chickweed). | |
| Bigeminate | [Leaves] {complexity form} | With two orders of leaflets, each divided into pairs or geminately compound; doubly paired. |
| Bilabiate | having two lips | |
| Bilaterally symmetric | [Calyx, Corolla] {symmetry} | Divisible into two essentially equal portions along only one plane. |
| Bipalmately compound | [Leaves] {complexity form} | With two orders of leaflets, eachpalmately compound; twice palmately compound. |
| Bipinnate | twice pinnate | |
| Bipinnately compound | [Leaves] {complexity form} | With two orders of leaflets, each pinnately compound; twice pinnately compound. |
| Bipinnately lobed | [Leaves] {lobing form} | With two orders of leaf lobing, each pinnately lobed; twice pinnately lobed. |
| Bipinnate-pinnatifid | [Leaves] {complexity form} | Twice pinnately compound with pinnatifid leaflets. |
