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what are fusiform and napiforms ?

Fusiform and napiform are modified roots. In fusiform roots the primary root is swollen in the middle and then it tapers to form spindle shaped structure. Ex. Radish. In napiform roots the base of the root is swollen (giving it a round shape) and then it tapers towards the end forming a tail like structure. Ex. Turnip. 

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Both fusiform root and napiform tap root are the types of modified tap root. These are modified to store the food. Stem in these cases is present in the form of reduced narrow green disc.Food is stored in primary root as a result it gets swollen.

Fusiform root: The root which is widest in the middle due to food storage and becomes narrow at top and bottom, imparting it a spindle shaped structure. For example: Radish.

Napiform root: The root which is wide at the top and narrows abruptly and forms a tail like thing at the bottom. For example turnip.

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Both fusiform root and napiform tap root are the types of modified tap root. These are modified to store the food. Stem in these cases is present in the form of reduced narrow green disc.Food is stored in primary root as a result it gets swollen.

Fusiform root: The root which is widest in the middle due to food storage and becomes narrow at top and bottom, imparting it a spindle shaped structure. For example: Radish.

Napiform root: The root which is wide at the top and narrows abruptly and forms a tail like thing at the bottom. For example turnip.

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Both fusiform root and napiform tap root are the types of modified tap root. These are modified to store the food. Stem in these cases is present in the form of reduced narrow green disc.Food is stored in primary root as a result it gets swollen.

Fusiform root: The root which is widest in the middle due to food storage and becomes narrow at top and bottom, imparting it a spindle shaped structure. For example: Radish.

Napiform root: The root which is wide at the top and narrows abruptly and forms a tail like thing at the bottom. For example turnip.

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Prajit Sengupta good answer.

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