Question

Lomentum is
A. Achenial fruit
B. Schizocarpic fruit
C. Composite fruit
D. Syconus fruit

Answer 1

Lomentum is a simple, dry, dehiscent, leguminous fruit which is constrained as many segments in such a way that each of the segments contain only one seed.

Complete answer:
Option A: Achenials are mono carpellate indehiscent dry fruit produced by many flowering plants. They contain a single seed that nearly fills the pericarp. Eg:amaranth, cannabis Therefore, this is the incorrect option.
Option B: Schizocarp are dry fruits which split up into mericarps(an individual carpel of schizocarps, having a single seed) upon maturation. They are of two types. Indehiscent fruits which include carrot,malva or dehiscent fruit which include lomentum. Therefore this is the correct answer.

Tick trefoil ( Desmodium) and sweet vetch (Hedysarum) are two varieties which produce schizocarpic fruits. These plants are from the Fabaceae family. Schizocarpic fruit is restricted between seeds and broken down into many segments having one or more seeds.
Option C: Composite fruits are the ones which develop from an inflorescence rather than a single flower. Here the flowers and the peduncles on which they are borne together develop the fruit.Sorosis and syconus are the two main types of composite fruits. Eg: mulberry. Therefore, this is the incorrect option.
Option D: Syconus fruit is a type of composite fruit. They develop from hypanthodium inflorescence. In this case,small flowers are produced inside a hollow fleshy inflorescence and they develop into fruits. Eg: fig. Therefore, this is the incorrect option.

Hence, the correct answer is option (B)

Note: Indehiscent fruits are those which do not split when ripen and their seed remains inside.
In contrast the pericarp of dehiscent fruits is split open upon ripening and the seeds disappear.