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Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons
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Pteridaceae E.D.M.Kirchn.

PTERIDACEAE

Sori mainly fused to coenosori, protected by lamina margin, with or without a true indusium. Sporangia long-stalked, spores tetrahedral or bilateral, without perispore, about oblong, smooth to tuberculate; annulus us. narrow. Rhizome creeping and solenostelic, or forming an oblique stock and dictyostelic, bearing paleae or hairs. Fronds pinnately compound; veins free or anastomosing, no included veinlets. Prothallus cordate. About 10 genera of wide distribution.

Key

1
Rhizome short, ascending, forming a stock; fronds tufted or closely approximate
4. PTERIS
Rhizome long, far-creeping; fronds distributed along rhizome
2
2
Lamina segs mostly under 5 mm. long, glandular-pubescent; rhachis zigzag
1. PAESIA
Lamina segs mostly 10 mm. long or more, not glandular-pubescent; rhachis straight or nearly so
3
3
Rhizome paleate; lamina segs not rigid, us. ± glaucous; sori protected by lamina margin only; spores bilateral
2. HISTIOPTERIS
Rhizome hairy; lamina segs rigid, not glaucous; sori us. with true indusium; spores tetrahedral
3 PTERIDIUM
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