1. There are many corolla lobes show glandular hairs at the abaxial surface . 2. The abaxial surfaces of the leaves are conspicuously barred with dark green and maroon. 3. Seeds are some 3mm in length, reniform and sculpted on the abaxial surface . 4. Sori are evident on the abaxial surface . 5. The undersides of the leaves ( abaxial surface ) sometimes exhibited parallel longitudinal ridges and grooves. 6. The leafblades may be hairy or glabrous, canaliculate and marked with maroon spots and bars on the abaxial surface . 7. Case-making larvae were collected on the abaxial surface of old fronds of " Cibotium glaucum ". 8. The adaxial and abaxial surface of the leaf is covered with yellowish or purplish spines that grow from purple wart-like structures. 9. In a leaf, the adaxial surface of the leaf will usually be the upper side, with the abaxial surface the lower side. 10. In ferns, sporangia are typically found on the abaxial surface ( underside ) of the leaf and are densely aggregated into clusters called sori.
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