. Fossil plants : for students of botany and geology . Paleobotany. 276 AEAirCAKINEAE [CH. Pagiophyllum peregrinum (Lindley and Hutton). This species, first named by Lindley Araucaria peregrina^, was founded on material from the Lias of Lyme Regis in Dorsetshire^. It is possible that the generic name chosen by Lindley correctly expresses the position of the species, but decisive evidence is lacking. Vegetative shoots bear crowded imbricate, spirally dis- posed, leaves tetragonal in section, broadly triangular, sometimes fal- cate and more or less appressed to the stem in the lower portion of t
. Fossil plants : for students of botany and geology . Paleobotany. 276 AEAirCAKINEAE [CH. Pagiophyllum peregrinum (Lindley and Hutton). This species, first named by Lindley Araucaria peregrina^, was founded on material from the Lias of Lyme Regis in Dorsetshire^. It is possible that the generic name chosen by Lindley correctly expresses the position of the species, but decisive evidence is lacking. Vegetative shoots bear crowded imbricate, spirally dis- posed, leaves tetragonal in section, broadly triangular, sometimes fal- cate and more or less appressed to the stem in the lower portion of the lamina (fig. 744). There is a distinct dorsal keel and occasion- ally rows of papillae are visible on the lamina; the apex is obtuse or acute. The leaves vary consi- derably in size and shape. Zeiller* describes the cuticle of the dorsal and ventral surfaces of some leaves on Permian specimens from Blanzy: the stomata occur in longitudinal rows on the lower face only, the guard-cells being usually at right-angles to the long axis of the leaf. In habit this species agrees closely with Elatides William- sonis, a Middle Jurassic type; it occurs in Jurassic rocks of Eng- land, France, Germany, Italy, and elsewhere, the oldest recorded ex- amples being those described by. Fig. 744. Pagiophyllum peregrinum. (British Museum; nat. size.) 1 Lindley and Hutton (33) A. PI. Lxxxvni. 2 Seward (04) B. p. 48, PJ. v.; Saporta (84) p. 383, Pis. 173—176, 3 Zeiller (06) B. 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
Size: 928px × 2694px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
