The internal structure of a plant stem is observed. There is a discontinuous ring of angular collenchyma below the epidermis. Type of vascular bundles are of the same type as in the stems of solanaceous plants. Sieve tube elements possess simple sieve plates, identify the plant. |
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a) |
Helianthus |
b) |
Cucurbi ta |
c) |
Zea mays |
d) |
Hydrilla |
The internal structure of a plant stem is observed. There is a discontinuous ring of angular collenchyma below the epidermis. Type of vascular bundles are of the same type as in the stems of solanaceous plants. Sieve tube elements possess simple sieve plates, identify the plant. |
|||||||
a) |
Helianthus |
b) |
Cucurbi ta |
c) |
Zea mays |
d) |
Hydrilla |
(b) Hypodermis in the stem of Cucurbita is made up of angular collenchyma. Hypodermis is two or three-layered or sometimes altogether absent. The vascular bundles are conjoint, open and bicollateral, i.e., phloem is present on both side of xylem. |