There was a green plant with flat stem, but no leaves. The entire plan

1.	There was a green plant with flat stem, but no leaves. The entire plant was covered by soft spines.
Answer» Student must have observed phylloclade, which is a modification of stem. Phylloclade: a. Modification of stem into leaf like photosynthetic organ is known as phylloclade. b. Being stem it possesses nodes and internodes. c. It is thick, fleshy and succulent, contains mucilage for retaining water e.g. Opuntia, Casuarina (Cylindrical shaped phylloclade) and Muehlenbeckia (ribbon like phylloclade).

There was a green plant with flat stem, but no leaves. The entire plant was covered by soft spines.

Answer»

Student must have observed phylloclade, which is a modification of stem.

Phylloclade:

a. Modification of stem into leaf like photosynthetic organ is known as phylloclade.

b. Being stem it possesses nodes and internodes.

c. It is thick, fleshy and succulent, contains mucilage for retaining water

e.g. Opuntia, Casuarina (Cylindrical shaped phylloclade) and Muehlenbeckia (ribbon like phylloclade).