Question

Differentiate between
(i)stipule and bract

Answer 1

Hint: One of them is a tiny, leaf-like paired appendage present on the base of the leaf petiole while another is a term used to describe a modified leaf that functions as an attraction for pollinators similarly as a petal attracts.

Complete answer:

	stipule	Bract
1	An outgrowth born on either side (sometimes just one side) of the base of a leafstalk (the petiole) is known as a stipule.	A specialized leaf comes to our mind when we talk about bract, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale, these are often different from foliage leaves.
2	A pair of stipules in many species the stipules are inconspicuous or absent (and the leaf is then termed exstipulate) but generally, in a typical flowering plant, it is considered part of the anatomy of the leaf.	The bracts found in a typical flower may be of various shapes and sizes like smaller, larger, or a different color, or texture and also look different from the parts of the flower(petals or sepals).
3	stipules are parts of true leaves	while these bracts being part of the inflorescence are a type of modified leaves.
4	Linnaeus coined the word stipule from the Latin stipula, straw, stalk.	And the term bract came from the new Latin bractea means thin metal plate, gold leaf, variant of brattea, of obscure origin.
5	Some plants used foliaceous stipules as leaves to produce energy also sometimes it can be seen protecting the next leaf or bud as it grows in then falls off after the leaf unfolds, as with Tulip Poplars.	Some brightly-colored bracts which work as a source for attracting pollinators, either together with the perianth or instead of it, eg: this type of bract includes some large colorful bracts surrounding much smaller, less colorful flowers like Euphorbia pulcherrima (poinsettia) and Bougainvillea.

Additional Information: 1) Caducous, deciduous, and persistent are the three pes of stipules that can be found according to duration, where caducous stipules fall off before the leaf unfolds, while deciduous stipules fall off immediately after the leaf unfolds. And the persistent stipules remain attached to the plant.
2) A stipule might appear as glands, scales, hairs, spines, or laminar (leaf-like) structures. When around a whole stem a single stipule is present, it is known as an ochrea.
3) Bracteates or bracteolate can be defined as the state of having bracts, and conversely, the state of lacking them is referred to as ebracteate and ebracteolate, without bracts.

Note: The stipules have various functions but some stipules are not well understood or maybe vestigial. Climbing tendrils are kind of stipules that are used by the climbing plants as well as spiny stipules can be used to help protect the plant from animals. Lemma (lower bract) and palea (upper bract) encloses each floret (flower) in a pair of papery bracts in grasses, while each spikelet (a group of florets) has a further pair of bracts at its base called glumes. During threshing and winnowing, these bracts from the chaff are removed from cereal grain.