Class 11 Biology - Chapter Morphology of Flowering Plants NCERT Solutions | Differentiate between a. Bract and Brac

a. Bract: When a flower is modified condensed shoot specialized to carry out sexual reproduction in higher plants. Like a branch, it arise in the axil of a small leaf- like structure called bract.

Bracteole: It is a leaf like structure which is present between bract and flower or we can say in the middle of pedicel.

b. Pulvinus: It is a swollen leaf base that are present in leguminous plants which provides movement of the leaf.

Petiole: It connects the leaf base to the lamina. It is a cylindrical or sub cylindrical structure of a leaf stalk. It raises the lamina above the stem level to provide the sufficient light exposure.

c. Pedicle: The receptacle consists of several crowded nodes which are separated by condensed internodes. And, these internodes of the branch which lies below the receptacle is called pedicel.

Peduncle: It is the stalk of complete inflorescence.

d. Spike: When flowers are attached on elongated peduncle but the flowers have no stalks (i.e. sessile). Example: Achyranthes.

Spadix: Spadix is a special type of spike having sterile Peduncle and a large showy bract called spathe. Example: Palm.

e. Stamen: Stamen represents the male reproductive organ of flower.

Staminiod: A sterile or abortive stamen is known as staminoid.

f. Pollen: Male gametophyte of angiosperm is called pollen or microspore.

Pollenium: Pollenium is a group of pollen grains from the same flower which are held together by the sticky substance.