What type of flower has a capitulum structure?

Inflorescences. Nearly all Asteraceae bear their flowers in dense flower heads called capitula. They are surrounded by involucral bracts, and when viewed from a distance, each capitulum may appear to be a single flower.

In which flower head of the flower is called as capitulum?

The composite inflorescence, capitulum, or flower head in Asteraceae assembles multiple flowers into a single, highly compressed structure.

What is capitulum in Asteraceae?

The inflorescence of Asteraceae, one of the largest and most successful families of flowering plants, is a specialized, complex structure called the capitulum. … In many cases, a heterogeneous capitulum has a flat radiate form, and its flowers differentiate into the marginal ray and the central tubular disc florets.

What is capitulum with example?

capitulum A type of flowering shoot (see racemose inflorescence) characteristic of plants of the family Compositae (Asteraceae), e.g. daisy and dandelion. The tip of the shoot is flattened and bears many small stalkless flowers (florets) surrounded by an involucre (ring) of bracts.

Are sunflowers pseudanthium?

Pseudanthia are characteristic of the daisy and sunflower family (Asteraceae), whose flowers are differentiated into ray flowers and disk flowers, unique to this family. … The pseudanthium has a whorl of bracts below the flowers, forming an involucre.

What do you mean by capitulum?

1 : a rounded protuberance of an anatomical part (such as a bone) 2 : a racemose inflorescence (as of the sunflower) with the axis shortened and dilated to form a rounded or flattened cluster of sessile flowers — see inflorescence illustration.

What articulates with the capitulum?

The capitulum laterally articulates with the radius; the trochlea, a spool-shaped surface, articulates with the ulna.

Is the capitulum lateral?

The capitellum, also referred to as the capitulum, is the lateral part of the humeral condyle that articulates with the radial head.

What is the function of the capitulum?

capitulum: At the distal head of the humerus, it articulates with the radius of the forearm. trochlea: At the distal head of the humerus, it articulates with the ulna of the forearm. anatomical neck: A constriction adjacent to the humeral head that increases the range of movement possible at the shoulder joint.

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Is a capitulum a flower?

Capitulum is a pseudanthium, a false flower that superficially mimics a single flower but is a highly aggregated structure comprised of multiple flowers with specialized functions.

Are all Asteraceae edible?

The stems and leaves of all species have milky juice, and all are edible, but bitter. Bitter substances like dandelion greens are helpful as an appetizer to stimulate digestive secretions before the main meal.

Are sunflowers and daisies related?

The largest family of flowering plants is the ubiquitous sunflower family (Asteraceae or Compositae). … Familiar common names, such as daisies, marigolds, zinnias, gazanias, chrysanthemums, dandelions, thistles, ragweeds, sagebrush, cosmos and dahlias all belong to this family.

What is the Capitula of a flower?

A head (capitulum) is a short dense spike in which the flowers are borne directly on a broad, flat peduncle, giving the inflorescence the appearance of a single flower, as in the dandelion (Taraxacum). … This results in a grouping of small flowers in such a way as to appear as a single flower.

What are the types of capitulum?

Capitulum or Racemose Head (Fig. The latter are of two types, tubular and ligulate. The florets are arranged in a centripetal fashion, e.g., younger towards the cenre and older towards the periphery. The inflorescence is surrounded by one or more whorls of bracts called involucre.

What is Raceme inflorescence?

: a simple inflorescence (as in the lily of the valley) in which the flowers are borne on short stalks of about equal length at equal distances along an elongated axis and open in succession toward the apex — see inflorescence illustration.

What is a Corolla in a flower?

: the part of a flower that consists of the separate or fused petals and constitutes the inner whorl of the perianth.

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What is Rayflorets?

Ray florets are flowers with long, straplike petals along the outside of the sunflower. Each petal on the outside of a sunflower is a flower.

Is a sunflower not one flower?

The sunflower is not a single flower at all, but a whole bouquet. … Next to the phyllaries are the ray flowers (sometimes called petals by the uninitiated). Normally ray flowers produce seeds, but the ray of the sunflower is sterile and serves only to attract insects.

What does Apperceive mean?

verb (used with object), ap·per·ceived, ap·per·ceiv·ing. Psychology. to have conscious perception of; comprehend. to comprehend (a new idea) by assimilation with the sum of one’s previous knowledge and experience.

What are the trochlea and capitulum?

The trochlea and capitulum are the rounded, smooth, knuckle-like surfaces at the anterior and distal end of the humerus. The elbow flexes and extends around these structures. Two outcroppings of bone flank the trochlea and capitulum.

What does monadelphous stand for?

Wiktionary. monadelphousadjective. Having all its stamens within a flower fused together at least partly by the filaments.

Is the capitulum a condyle?

Although not generally termed condyles, the trochlea and capitulum of the humerus act as condyles in the elbow, and the femur head acts as a condyle in the hip joint.

Where in the body is the capitulum?

humerus Anatomical terms of bone In human anatomy of the arm, the capitulum of the humerus is a smooth, rounded eminence on the lateral portion of the distal articular surface of the humerus. It articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone.

Where are capitulum found?

Immediately lateral to the trochlea is the capitulum (“small head”), a knob-like structure located on the anterior surface of the distal humerus. The capitulum articulates with the radius bone of the forearm. Just above these bony areas are two small depressions.

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Is capitulum medial to trochlea?

It articulates with the scapula at the shoulder joint, and the radius and ulna at the elbow. … The other, called the capitulum, is a small spherical structure lateral to the trochlea that articulates with the head of the radius. The capitulum is on the lateral side, the trochlea is medial.

Is the capitulum part of the ulna?

Capitulum of humerus – Capitulum humeri In dog and cats, the condyle is divided in two parts: The trochlea, the medial part, that articulates with ulna. The capitulum, the lateral part; that articulates with radius.

Is the Capitellum cartilage?

There are two cartilage-covered parts of the end on the humerus: The trochlea on the inside of the elbow. The capitellum on the outside of the elbow.

What is the medial epicondyle of the humerus?

The medial epicondyle is a secondary growth centre at the elbow, which first appears around age 6 and fuses to the shaft of the humerus at about age 14-17 years. A medial epicondyle fracture is an avulsion injury of the attachment of the common flexors of the forearm.

How do you palpate capitulum?

How can you tell the difference between a humerus and a femur?

Humerus is located in the upper arm, whereas femur is found in the upper leg. The length and the average diameter of the femur are higher than that of humerus. Femur is the largest bone in the body while humerus is the second largest.