| Name | Structure/ Category | Description |
|---|---|---|
| Bipinnatifid | A simple leaf or leaflet that is pinnatifid with lobes along its side margins; these lobes are also pinnatifid with secondary lobes along their margins. Some species of ferns have bipinnatifid leaves; the lobes of such leaves are often cleft. | |
| Bisexual | (1) Having functional reproductive structures of both sexes (i.e. male and female) in the same flower or cone. | |
| Bisexual | (2) [Flowers] {gender} | Having functional reproductive structures of both sexes (i.e. male and female) in the same flower. |
| Biternate | [Leaves] {complexity form} | With two orders of leaflets, each divided into threes or ternately compound; twice trifoliolate. |
| Blade | The flat, expanded portion of a leaf, petal, sepal, etc. | |
| Blade-like | [Stipules] {type} | Expanded and flattened, as the main portion or blade of a broad leaf. |
| Blotched | [Leaf lower surface, Leaf upper surface] {color variegation} | The color disposed in broad, irregular blotches. |
| Bordered | [Leaf lower surface, Leaf upper surface] {color variegation} | One color is surrounded by an edging of another. |
| Boreal | of, relating to, or constituting a terrestrial biogeographic division comprising the northern and mountainous parts of the northern hemisphere in which mean temperature during the six hottest weeks does not exceed 64.4o F. and being equiva lent to the Holarctic region exclusive of the Sonoran and Transition zones and corresponding Old World areas | |
| Brachiate | having widely spreading branches arranged in altenating pairs |
