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Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons
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Adiantum L.

ADIANTUM L., 1753

Sporangia borne on veins or extending to interspaces on inner face of reflex portions of lamina margin; pedicel slender, annulus incomplete, vertical. Spores tetrahedral to bilateral, smooth, us. dark. Rhizome far-creeping to short and ascending, with narrow dark paleae. Lamina pinnately decompound to simply pinnate, mostly firm. Some 200 terrestrial spp. of wide distribution.

Key

1
Pinnules flabellate to suborbicular, cuneate to truncate at base; stalk central
1. aethiopicum
Pinnules dimidiate; stalk attached at lower base of pinnule
2
2
Rhizome short, stipites crowded; sporangia in deep sinus between lobes
3
Rhizome long, stipites distributed; sporangia in shallow sinus of lobe, not in deep sinus between lobes
4
3
Primary pinnae 1-3, rhachis not hispid; pinnule delicate
2. diaphanum
Primary pinnae 5-7 or more; rhachis hispid; pinnule firm
3. hispidulum
4
Fronds up to 1m. or more long; fertile pinnules c. 6-15 mm. long
4. formosum
Fronds not over 6 dm. long; fertile pinnules c. 12-25 mm. long
5
5
Rhachis and costa smooth; pinnules ± glaucous below, not falcate
5. cunninghamii
Rhachis and costa clad in fulvous hairs; pinnules not glaucous below, ± falcate
6. fulvum
Fig. 3. ADIANTUM. Reflexed lamina-margins protecting sori. © All rights reserved. [Image: 4X1D]
Fig. 3. ADIANTUM. Reflexed lamina-margins protecting sori. © All rights reserved. [Image: 4X1D]
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