1、 Blade difference

The leaves of stone reed are leathery, lanceolate, oblong lanceolate or linear lanceolate, about 7-20 cm long and 1.5-3 cm wide. The apex is acuminate, the base is gradually narrowed, the edge is entire, the top is green, there are fine spots, and there are light brown star awn hairs below. Petiole longer, ca. 6-15 cm

Vawe leaves are papery, linear lanceolate or narrow lanceolate, and the petiole is much shorter than the former, about 1-3cm long

2、 Sporangium differentiation

The sporangium group of stone reed is oval, and each sporangium group has star hair at intervals, which is light brown

The sporangia of wawei are round, covered with round brown septum filaments when young, close to each other, and almost connected after maturity