Which of the following pairs of family's posses pollinia?
Orchidaceae and Apocynaceae
Orchidaceae and Asclepiadaceae
Asclepiadaceae and Mimosaceae
Asclepiadaceae and Apocynaceae
Outer covering of epiphytic root is
Each cluster at a node in a verticillaster represents
The floral formula, Br $\oplus$ $\mathop {\rm{O}}\limits_ + \,\,\,\,\,\,\,{{\rm{P}}_{{\rm{3 }} + {\rm{3}}}}\,\,\,\,{{\rm{A}}_{{\rm{3}} + {\rm{3}}}}\,{\underline G _{(3)}}$ belongs to family
Presence of staminode is characteristic feature of