16 - Aspleniaceae
from Division 3 - Polypodiophyta
Summary
Perennial herbs with an erect or creeping rhizome bearing firm scales with dark cell walls. Fronds borne in tufts at the ends of rhizomes, spirally coiled when young; scales often sparse, of one sort, simple and entire to 3-pinnate; stipe with 2 vascular bundles below which often fuse into a single x-shaped strand above. Sori oblong to long and linear, borne along one or both sides of veins on underside of frond. Indusia usually present. Spores bilateral.
- Type
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- Information
- Flora of Great Britain and Ireland , pp. 28 - 32Publisher: Cambridge University PressPrint publication year: 2018