Category: B

Usually of flowers with porate anthers, where the pollen is shaken from the thecae by the vibration of the body of a visiting bee.  

Of the lower trunk of a tree, with buttresses.  

Mechanical supporting system at the base of a tree, usually a woody fin. Flattened support structures at the base of the trunk of certain types of trees, particularly in the tropics. Planklike supporting structure extending outward from the base of a tree trunk at the juncture of the roots and trunk. Some are relatively narrow…

Woody plant intermediate between shrub and tree, 3–7 m high and usually multistemmed [not recommended]; Low and thick shrub, usually without a distinct trunk [not recommended]; Often used in the same sense as shrub [shrub is preferred in this case]; Undefined term for dense vegetation [not recommended, bushland seems better]. Woody plant with many stems…

In Orchidaceae, a flap- or sheath-like base covering the viscidium.  

Rough, prickly envelope of a fruit, formed of cohering prickly bracts, accrescent calyx or pericarp; sometimes spelled bur; Woody swelling of trees, usually at the base of the trunk, associated with epicormic shoots. A bit used with a drill to make holes in a bone such as the cranium ‘or in a tooth.