. Fossil plants : for students of botany and geology . Paleobotany. 348 FILICALES [CH. is selected as the best known and most widely-spread representa- tive of Jurassic Schizaeaceae. Klukia exilis (Phillips)^. Fig. 259. The generic name Klukia was proposed by Eaciborski^ for a species originally described by Phillips^ from the Inferior Oolite of the Yorkshire coast as Pecopteris exilis. Bunbury's* discovery (supplemented by additional evidence obtained by Raciborski) of well-preserved sporangia justified the substitution of a distinctive designation for the provisional term Pecopteris. Fig. 25
. Fossil plants : for students of botany and geology . Paleobotany. 348 FILICALES [CH. is selected as the best known and most widely-spread representa- tive of Jurassic Schizaeaceae. Klukia exilis (Phillips)^. Fig. 259. The generic name Klukia was proposed by Eaciborski^ for a species originally described by Phillips^ from the Inferior Oolite of the Yorkshire coast as Pecopteris exilis. Bunbury's* discovery (supplemented by additional evidence obtained by Raciborski) of well-preserved sporangia justified the substitution of a distinctive designation for the provisional term Pecopteris. Fig. 259. Klukia exilis (Phillips) nat. size.). (Figs. 1—3, fig. 4, x3]; fig. 5, The species may be defined as follows:— Frond tripinnate, of the Cladophlehis type; pinnae linear, lanceolate, attached to the rachis at a wide angle. Ultimate segments short and linear, entire or, in the lower part of a frond, crenulate, 5 mm. long or occasionally longer. Sporangia 0-5 mm. in length, borne singly on the lower surface of the lamina in a row on each side of the midrib. A re-examination^ of the specimen described by Bunbury confirmed his account of the structure of the sporangia. The pinna shown in fig. 259 is characterised by unusually small fertile pinnules some of which bear 10 sporangia in two rows; the annulus includes about 14 cells. Fertile specimens of this and similar forms are figured by Raciborski® from Jurassic rocks of Poland, and good examples of the English species maybe seen ' For synonymy, see Seward (00) p. 130. " Baciborski (91). 3 Phillips (29) A. p. 148. •» Bunbury (51) A. ^ Seward (94^) A. « Baciborski (94) 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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