frond of Heterangium

frond of Heterangium

Frond members belonging to the monostelic seed fern genus Heterangium have been found in Pennsylvanian age coal balls collected in the Illinois Basin. Petioles bear small pinnae below a dichotomy which produced a bipartite frond. Pinnules of the Sphenopteris obtusiloba type are borne on secondary pi...

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Veröffentlicht in:American journal of botany 1975, Vol.62 (1), p.67-75
Hauptverfasser: Shadle, G.L, Stidd, B.M
Format: Artikel
Sprache:eng
Schlagworte:
Anatomy
Cardiovascular system
Coal
Epidermal cells
Epidermis
Ground tissue
Petioles
plant anatomy
plant morphology
Specimens
Trichomes
Vascular bundles
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Beschreibung
Zusammenfassung:Frond members belonging to the monostelic seed fern genus Heterangium have been found in Pennsylvanian age coal balls collected in the Illinois Basin. Petioles bear small pinnae below a dichotomy which produced a bipartite frond. Pinnules of the Sphenopteris obtusiloba type are borne on secondary pinnae. The anatomy of each pinna order and the pinnules is described.
ISSN:0002-9122
1537-2197
DOI:10.1002/j.1537-2197.1975.tb12339.x