. The Eusporangiatae; the comparative morphology of the Ophioglossaceae and Marattiaceae. Ophioglossaceae; Marattiaceae. Fig. 122. Young sporophyte of Marattia douglasii still attached to the gametophyte, pr; Natural A. Young sporophyte of Kaulfussia attached to gametophyte,/T. X2. B. Cotyledon from another plant. X2. C. A later leaf; jl, stipule. Xl. in the second leaf. Figure 124, C, shows drawings of a number of the forms from my collection, showing the variation from a strictly pinnate to a perfectly dichoto- mous venation. Many of them show an intermediate venation, but with very f

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. The Eusporangiatae; the comparative morphology of the Ophioglossaceae and Marattiaceae. Ophioglossaceae; Marattiaceae. Fig. 122. Young sporophyte of Marattia douglasii still attached to the gametophyte, pr; Natural A. Young sporophyte of Kaulfussia attached to gametophyte,/T. X2. B. Cotyledon from another plant. X2. C. A later leaf; jl, stipule. Xl. in the second leaf. Figure 124, C, shows drawings of a number of the forms from my collection, showing the variation from a strictly pinnate to a perfectly dichoto- mous venation. Many of them show an intermediate venation, but with very few exceptions, even where a midrib was present, this was forked at the apex, indicating. 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 Campbell, Douglas Houghton, 1859-1953. Washington, D. C. , Carnegie Institution of Washington

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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910