Forever Evergreen Leaves
An Angiopteris evecta leaves are bi-pinnate, only in rare occasions they may produce tri-pinnate or mono-pinnate. The leaves shape of the Angiopteris evecta are long slender with serrate edge going towards the tips of the pinnate leaf.
The leaves are alternate to each other, which the veins from the midrib to the edge of the serrate tips.
As for the pattern of the veins on the Angiopteris evecta have one single then double veins to give its uniqueness, which normally give a false veins impression .
On the cellular structure of the midrib of the leaf pitted where it exchanging CO2 gases in, but releasing H2O and others gases out.
Having large stomas on the leaves the exchanges of H2O gases maybe lost through its moisture, especially through the driest periods causing it to lose its vascular flexibility throughout the ferns, which makes the fronds to collapse.
This is where the Angiopteris evecta ferns becomes vulnerable and prone to fires. In the other extreme of the situation is where too much water can also be a threat to the Angiopteris evecta ferns.
Knowing it is a vascular fern it likes to draw water and nutrients up through its rhizome roots, but if it gets too wet the Angiopteris evecta ferns will drown.
Caused by the vascular system drawing up the water and nutrients from the rhizome roots to the cellular structure on the tip of the leaves will start to form a hydrophilic effect.
This effect will causes the cellular structure in the walls of the vascular fronds to implode, by this the cells are filling up with too much water, which the fronds will start to split, as it one of contributes the threat to the Angiopteris evecta ferns.
As fire can be another contribute threat to the Angiopteris evecta ferns, where the fire will dried out and burn the fern.
To the point the ferns cannot handle bush fires as the heat from the fires, will draw out the water from the cells, where the fronds will collapsed from extreme heat and the fern will never recover.