. Studies in fossil botany . Paleobotany. FERNSâFRUCTIFICATIONS 283 and with the central receptacle; higher up they become free, and dehiscence appears to have taken place on the inner side, where the sporangial wall was thinnest. Strasburger's remarks on the affinities of. Fig. no.âScolecopteris polymorpha. A. Lower surface of a fertile pinnule, showing numerous quadrisporangiate synangia (sj>). Note the cruciform receptacle at the centre of some of the synangia. X about 8. B. Transverse section of half a pinnule, passing through a synangium. £â , vascular bundle of pinnule; f, infolded m
. Studies in fossil botany . Paleobotany. FERNSâFRUCTIFICATIONS 283 and with the central receptacle; higher up they become free, and dehiscence appears to have taken place on the inner side, where the sporangial wall was thinnest. Strasburger's remarks on the affinities of. Fig. no.âScolecopteris polymorpha. A. Lower surface of a fertile pinnule, showing numerous quadrisporangiate synangia (sj>). Note the cruciform receptacle at the centre of some of the synangia. X about 8. B. Transverse section of half a pinnule, passing through a synangium. £â , vascular bundle of pinnule; f, infolded margin of pinnule; a, wall of sporangium; c, receptacle, fused to the sporangia. X about 18. After Renault. this fossil may be quoted, for they apply to the genus as a whole, and express the view still generally held. " Zenker's Scolecopteris elegans, according to the forma- tion of its sorus, certainly belongs to the Marattiaceae, and, in fact, comes nearest the genus Marattia in the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
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