. Fossil plants : for students of botany and geology . Paleobotany. 370 FILICALES [CH. Johnstrupi^ from the Cretaceous beds (Kome series) of Greenland are very similar to Gnniopteris hymenophylloides. Coniopteris quinqueloba (Phillips). Fig. 273. This species, originally described by Phillips^ as Sphenopteris quinqueloba, is very similar in habit to G. hymenophylloides, differing chiefly in the smaller size of the leaf and in the narrower ultimate segments. The specimen shown in fig. 273, B, illustrates the form of the sorus and Fig. 273. Coniopteris quinqueloba (Phillips). A, x2;
. Fossil plants : for students of botany and geology . Paleobotany. 370 FILICALES [CH. Johnstrupi^ from the Cretaceous beds (Kome series) of Greenland are very similar to Gnniopteris hymenophylloides. Coniopteris quinqueloba (Phillips). Fig. 273. This species, originally described by Phillips^ as Sphenopteris quinqueloba, is very similar in habit to G. hymenophylloides, differing chiefly in the smaller size of the leaf and in the narrower ultimate segments. The specimen shown in fig. 273, B, illustrates the form of the sorus and Fig. 273. Coniopteris quinqueloba (Phillips). A, x2; B, considerably en- larged. From drawings supplied by Dr Nathorst. Coniopteris arguta (Lind. and Hutt.^). Figs. 274, 275, A. The sterile pinnae of this species bear pinnules of a type met with in various species of ferns from different horizons; the smaller ones are entire and slightly falcate, while on the lower part of a frond the ultimate segments are longer and have a crenulate margin. The fertile pinnae bear pinnules reduced to a midrib with a narrow border, and terminating in a cup-like indusium (fig. , A). In habit the sterile leaf (fig. 274) of this species is similar to the Jurassic Schizaeaceous fern Klukia exilis. Protopteris. Presl* instituted this genus'for a Lower Cretaceous tree- Heer (82) A. PI. ii. fig. 2. Seward (00). â¢' Phillips (75) A. p. 215. â ⢠Sternberg (38) A. p. 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 Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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