The fronds and rachis of H. confertivillosum, H. crenatum and H. glanduloso-pilosum (SEM). A H. confertivillosum fronds densely covered with long hairs adaxially (30×) B H. confertivillosum fronds and indusia densely covered with long hairs and sparsely rod-shaped glandular hairs abaxially (30×) C H. confertivillosum fronds and costae densely covered with long hairs and sparsely rod-shaped glandular hairs abaxially (30×) D H. confertivillosum costae densely covered with long hairs and sparsely rod-shaped glandular hairs abaxially (160×) E H. crenatum fronds sparsely covered with acicular hairs adaxially (60×) F Close-up view of H. crenatum fronds covered with acicular hairs adaxially (140×) G H. crenatum fronds and indusia densely covered with long hairs abaxially (30×) H Close-up view of H. crenatum indusia covered with long hairs abaxially (60×) I H. glanduloso-pilosum fronds densely covered with acicular hairs and rod-shaped glandular hairs adaxially (30×) J Close-up view of H. glanduloso-pilosum fronds covered with acicular hairs and rod-shaped glandular hairs adaxially (140×) K H. glanduloso-pilosum fronds and indusia densely covered with long hairs and rod-shaped glandular hairs abaxially (30×) L Close-up view of H. glanduloso-pilosum fronds covered with long hairs and rod-shaped glandular hairs abaxially (140×)