Having two spines or thorn-like projections.

Bearing both microsporangia and megasporangia (in some ferns).

Having two integuments (protective layers around an ovule).

Twice ternate; divided into three parts, each again divided into three.

Compound leaves divided into three leaflets, each itself divided into three.

Having two valves or segments that open (e.g., seed pods).

Mulching material used to suppress weeds and retain soil moisture.

The expanded, flat portion of a leaf or petal (lamina).

Resembling or functioning like a leaf blade.

To exclude light from stems or leaves to produce pale, tender growth.