Biology · Ch 9 — Morphology of Flowering Plants
Phyllotaxy
9.2C.4
Phyllotaxy
Phyllotaxy is the specific manner in which leaves are arranged on the stem and its branches, and it allows each leaf to receive sufficient light. The main types are:
- Alternate — a single leaf arises from each node, e.g. Mango.
- Opposite decussate — a pair of leaves arises from each node, with each successive pair set at right angles to the pair below it, e.g. Calotropis. …
Figure 9.38Types of phyllotaxy
What this figure shows. Four stems shown, each with a different leaf arrangement: alternate (a single leaf at each node, spiralling up the stem, as in Mango), opposite decussate (a pair of leaves at each node, each pair set at right angles to the pair below, as in Calotropis), opposite superposed (a pair of leaves at each node, with successive pairs stacked directly above one another in the same plane, as in Jamun), and whorled (three or mo …