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Medientyp:
E-Artikel
Titel:
Botryopteris forensis (Botryopteridaceae), a Trunk Epiphyte of the Tree Fern Psaronius
Beteiligte:
Rothwell, Gar W.
Erschienen:
American Botanical Society, 1991
Erschienen in:American Journal of Botany
Sprache:
Englisch
ISSN:
0002-9122;
1537-2197
Entstehung:
Anmerkungen:
Beschreibung:
<p>Basal parts of Botryopteris forensis have been discovered rooted within the mantle of the tree fern Psaronius. Specimens occur in Upper Pennsylvanian coal balls from near Steubenville, Ohio, USA. The Botryopteris stems branch profusely, and these shoots are intertwined with the Psaronius roots near the surface of the mantle. They also produce adventitious roots that extend among the Psaronius roots. This material demonstrates that B. forensis was a trunk epiphyte, rather than a rhizomatous terrestrial fern. The B. forensis plant is interpreted to have branched continuously, to ramify, and to maintain itself at the periphery of the growing mantle of Psaronius roots. A new reconstruction of B. forensis is offered showing the large, globose fructifications hanging pendulously from horizontal fronds on emergent shoots. Epiphytes and lianas are common on the trunks of Psaronius, indicating that some Marattiales did not produce leaf skirts.</p>