(a) Bract and Bracteolate Bract is a leaf like structure in the axil. i.e., at the base of which flowers are borne. They can be small or scaly, grreen and coloured and usually single, whereas bracteolate are bract like structures borne on the stalk of a flower
(b) Pulvinus and petiole Pulvinus is the leaf base, which is the proximal swollen region with which a leaf is attached to the stem. Petiole is cylindrical or sub-cylindrical stalk which connects the leaf base with the lamina.
(c) Pedical and Peduncle The stalk of a lower as pedicle , whereas the stalk of whole inflorescence is known as peduncle.
Spike and Spadix in spike inflorescence , the flowers are sessile that develop on an elongated peduncle in acropetal succession e.g. , Adhatoda. The peduncle is non-flesly. The spadix inflorescence si like spike, but it is covered by one to a few large bracts called spathes e.g., Colocasia. The peduncle is fleshy and its opical portion is naked ,i.e., without flowers.
Stamen and Staminoid The male reproductive organs or microporophylls of a flower are called stamen. A fully sterile under developed or abrtive stamen is called a staminoid e.g., Verbascum.
Pollen and Pollinium Microspore of an angiospermic flower is known as pollen. It is haploid, whereas a mass of pollen grains from the anther constitue the pollinium as in Calotropis.
