Morphology of Flowering Plants Test 61

Spadix inflorescence can be traced in Colocasia. It also produces clusters of two to five fragrant inflorescenes in the leaf axils. A spadix is a type of spike inflorescence having small flowers borne on a fleshy stem. Spadix are typical of the family Araceae, the arums or aroids. The spadix is typically surrounded by a leaf-like curved bract known as a spathe.
Therefore, the correct option is A.

The type of inflorescence in Ocimum sanctum is verticillaster. A cymose inflorescence arranged in pairs at the nodes, in the manner of a false whorl, is called as a verticillaster. A reduced raceme or cyme that grows in the axil of a bract is called a fascicle. A verticillaster is a fascicle with the
structure of a dichasium; it is common among the Lamiaceae. Many verticillasters with reduced bracts can form a spicate (spike-like) inflorescence that is commonly called as a spike.
Therefore, the correct option is C.

Oat is a member of Poaceae as it has spikelet inflorescence. Flowers of Poaceae are characteristically arranged in spikelets, each spikelet having one or more florets. The spikelets are further grouped into panicles or spikes. A spikelet consists of two (or sometimes fewer) bracts at the base, called as glumes, followed by one or more florets. A floret consists of the flower surrounded by two bracts, one externalthe lemmaand one internalthe palea.
Therefore, the correct option is A.

Cyathium inflorescence found in Poinsettia. Cyathium inflorescence is characteristic of family Euphorbiaceae (e.g., Euphorbia and Poinsettia). The cyathia are sometimes solitary, but are usually in cymes, inflorescences of the second order, in pseudumbels, on dichotomously branched stalks or in so-called simple cymes which consist of one central and two lateral cyathia. One extremely reduced female flower standing in the centre at the base of the involucre, consisting of an ovary on a short stem with pistil and surrounded by five groups one group at the base of each bracteole of extremely reduced male flowers, which each consist of a single anther on a stem.
Therefore, the correct option is B.

Cyanthium and hypanthodium resemble in having inflorescences of three types of flowers. So, the correct option is D. Here, the receptacle is fleshy and forms hollow ball like structure with an apical opening.Three types of flowers develop on the inner surface of the receptacle.The female flowers are towards the base, male flowers are towards the orifice and short styled sterile female flowers are in between.

Capitulum a type of flower head where the bracts are located under the basis, such as a daisy's, Helianthus, etc. A cyathium is one of the specialised pseudanthia (false flowers) forming the inflorescence of plants in the genus Euphorbia (Euphorbiaceae). Racemose Inflorescence is indeterminate and unbranched type of inflorescence. In raceme type, new flowers are generated at the tip of the inflorescence. There is no definite determination and the axis never terminates in a flower. For example, Brassica. Panicle is a branched raceme. The peduncle produces a number of branches in acropetal succession. On these branches pedicellate flowers are produced in acropetal succession. For example, Mango, Magnifera, etc. 

In Solanaceae the flowers have epipetalous stamens that is the stamens are attached to the petals with prominent anthers while in Compositeae we can see capitulum inflorescence. A flower head or capitulum is a very contracted raceme in which the single sessile flowers share are borne on an enlarged stem.

Option B is the correct answer. Inflorescence is a term used to define the arrangement of cluster of flowers on a stem either on the main stem axis or a peduncle.
In a raceme type of inflorescence, the flower develops at the axil between the stem and branch of a leaf on long, un-branched axis as is found in  snapdragon.
A spike is a raceme with the flowers developing directly from the stem. For example, barley.
Dichasial cyme has a stunted central flower and two lateral flowers on elongated pedicels. 

Anemochory is seed or fruit dispersal by wind. Balloon type inflated persistent calyx is a sub-type of anemochory in which inflated calyx is remain attached to the fruit. 
In Colutea, the same purpose is served by the inflated ovaries of the pod. The Colutea seeds are also dispersed by anemochory. But not the calyx but the inflated ovaries of the pod are involved in this mechanism.
Helianthus seeds are heavy are not provided with pappus. Such seeds are dispersed by censer mechanism (a sub-type of anemochory). Censer mechanism is a type of anemochory (wind dispersal) where the seeds are dispersed from the small opening on the fruit. This opening is very small that only few seeds can escape at a time. Balloon type inflated persistent calyx is characteristic of Physalis. It enables the seed containing fruits to float in air for some time. This is a kind of adaptation shown by the fruit for wind dispersal of its seeds. It is also called as anemochory.
Therefore, option C is correct. 

Pollinia is a mass of pollen grains which are fused by sticky discs called as corpuscula. This structure originates from a single anther. 
In Rubiaceae family, the anthers are 4-5 in number and are epipetalous i.e. attached to the petals. The anthers of Asteraceae are also epipetalous. 
Myrtaceae family does not show pollinia. 
Asclepiadaceae family show pollinia where the pollinia stick together and transported as a single unit during pollination. Pollination is carried out by insects. Hence, option C is correct.