| Name | Structure/ Category | Description |
|---|---|---|
| Bract | A modified, usually reduced leaf, often occurring at the base of a flower or inflorescence. | |
| Bracteole | a small bract; esp one on a floral axis -- called also bractlet | |
| Branch | A division or subdivision of a stem or other axis. | |
| Branchlet | An ultimate branch, i.e. one located at the end of a system of branches; a small Branch. | |
| Bristle | A slender, more or less straight and stiff, fine-pointed appendage; may be located at the tip of a leaf or bract and a continuation of the midvein, or comprising the pappus in fruits of the sunflower family (Asteraceae). | |
| Broadleaf herbaceous | [Plants] {habit} | Herbaceous with relatively broad leaves, thus differing from the long, narrow leaves of grasses (Poaceae) and other grass-like plants . |
| Broad-leaved | [Leaves] {general form} | With leaves that are not needle-like or scale-like, but having relatively broad, flat surfaces, as in most deciduous trees such as maples (Acer). |
| Bud | An immature shoot, either vegetative, floral or both, and often covered by protective scales. | |
| Buffered | in the case of Nymphaeaceae plants are protected from extreme fluctuations in temperature by the slower rate of change in the body of water (nb) | |
| Bulb | [Stems] {type} | A short, vertical, usually underground stem with fleshy storage leaves attached, as in onions (Allium cepa). |
