Morphology of Flowering Plants Test 68

Verticellaster - Verticellaster is a special type of inflorescence seen in Leucas. At each node of the stem two axillary opposite cymose inflorescences develop on either side. The cyme in the axil of each leaf, starts as a dichasial cyme but subsequently become monochasial scorpioid cyme. As a result the cyme bends round the stem on either side and meets a similar cyme from the opposite side. Hence, at each node there is a cluster of flowers completely surrounding the stem. This is the characteristic of family Labiatae. So, Verticilaster is a type of inflorescence and not placentation, venation and phyllotaxy. 
Therefore, the correct answer is option B.

A. Dermatogen is the primary meristem that forms the outermost layer of a plant or a plant part and forms the epidermis.

B. Calyptrogen is a specialized layer of rapidly dividing cells present at the root tips which continuously divide to form the root cap is formed.

C. Wound cambium is formed within amasses of cells (callus) which grow over the injured surface of a wound to heal and repair that part.

D. Vascular cambium is a lateral meristem that develops within the vascular bundles to produce xylem to the inner side and phloem to the outer side and is also called fascicular cambium.

So, the correct answer is A.

Each of the part of flower is arranged in a whorl on the receptacle. The four main whorls starting from outer side to inner side are as follows:

• Sepals: are the green outermost leaf like floral organs which protect the flower in bud stage and provide support to outer floral organs.
• Petals: are colored accessory floral organs which lie above sepals and they may also provide protection to centrally placed reproductive organs (stamens and carpel).
• Stamens: are located inside the corolla and are leaf-like appearance and are male reproductive part.
• Carpels are female reproductive part and are one or more in number and are located in the upper center of the flower

So, the correct answer is 'Sepals $$\rightarrow $$ Petals $$\rightarrow $$ Stamen $$\rightarrow $$ Carpel'

The term inflorescence refers to the group or cluster of flowers arranged on a stem or on an arrangement of branches. While there are  number of simple and compound inflorescence, verticellaster is a special type of inflorescence where at each node of the stem two axillary opposite cymose inflorescences develop on either side. The cyme in the axil of each leaf, starts as a dichasial cyme but subsequently become monochasial scorpioid cyme. The cyme bends round the stem on either side and meets a similar cyme from the opposite side, bringing about a cluster of flowers at each node. This type of inflorescence is commonly found in Lamiaceae. Very often verticillasters with reduced bracts  form an  inflorescence commonly called as a spike.
Therefore, the correct answer is option D.

Tulasi or Ocimum Sanctum belongs to family Lamiaceae and its flowers are tiny, purple and inflorescence is a verticillaster and forms a spike that is 12-14 cm in length.
Therefore, the correct answer is option C.

Cauliflower belongs to the species Brassica oleracea from the family Brassicaceae.The edible part of the plant though includes the outer jacket leaves and the white center called as the curd, mostly only the white curd is used. This white curd or cauliflower head is actually a white inflorescence meristem which resembles the broccoli.
Therefore the correct answer is option A.

Edible part of the cauliflower is inflorescence which can be defined as the arrangement of flowers on the plant. Cauliflower is the member of family Brassica. Only the head part of cauliflower is eaten which is composed of a white inflorescence meristem.

Solanine is a glycoalkaloid poison found in species of the nightshade family (Solanaceae), such as the potato (Solanum tuberosum) and the tomato (Solanum lycopersicum). It can occur naturally in any part of the plant, including the leaves, fruit, and tubers. Solanine has pesticidal properties, and it is one of the plant's natural defenses.

Hemicyclic flowers are flowers having floral leaves partly in spiral and partly in whorl.