21. The cordate prothallus are usually smaller with thinner midribs than that of other members of Polypodiaceae. 22. These are cordate with a blunt apex, which occasionally has a shallow notch at the tip. 23. The juvenile leaves are round, with a cordate ( base of heart-shaped ) base. 24. This plant forms a creeping rhizome and has cordate -ovate leaves that are medium green and glaborous. 25. The leaves are oblong, lanceolate or cordate ( heart-shaped ) and measure long by wide. 26. The leaves are heart-shaped ( cordate ), and measure long and wide with recurved margins. 27. The leaves are opposite and simple being 6 to 10 cm across, with base truncate or cordate . 28. The petiole of the leaf is slightly cordate , being bracketed on each side by the leaf blade. 29. It grows tall, with circular-cordate to ovate-cordate leaves that are typically long and wide. 30. It grows tall, with circular-cordate to ovate-cordate leaves that are typically long and wide.
