. Fossil plants : for students of botany and geology . Paleobotany. XI] SPHENOPHYLLUM EMARGINATUM. 407 II. Types of vegetative branches of Sphenophyllum. I. Sphenophyllum emarginatum (Brpngniart). Fig. 109. 1822. Sphenophyllites emarginatus, Brongniart', 1828. Sphenophyllum ema/rginatum, Brongniart^. 1828. Sphenophyllum trimcatum, Brongniart^. 1828. Rotularia marsileaefolia, Bisohofi'^. 1862. Sphenophyllum osnabrugense, Romer''. This species of Sphenophyllum, bears verticils of six or eight wedge-shaped leaves varying in breadth and in the extent of dissection of the laminae; they are truncate
![. Fossil plants : for students of botany and geology . Paleobotany. XI] SPHENOPHYLLUM EMARGINATUM. 407 II. Types of vegetative branches of Sphenophyllum. I. Sphenophyllum emarginatum (Brpngniart). Fig. 109. 1822. Sphenophyllites emarginatus, Brongniart', 1828. Sphenophyllum ema/rginatum, Brongniart^. 1828. Sphenophyllum trimcatum, Brongniart^. 1828. Rotularia marsileaefolia, Bisohofi'^. 1862. Sphenophyllum osnabrugense, Romer''. This species of Sphenophyllum, bears verticils of six or eight wedge-shaped leaves varying in breadth and in the extent of dissection of the laminae; they are truncate Stock Photo](https://c8.alamy.com/comp/RDBC4C/fossil-plants-for-students-of-botany-and-geology-paleobotany-xi-sphenophyllum-emarginatum-407-ii-types-of-vegetative-branches-of-sphenophyllum-i-sphenophyllum-emarginatum-brpngniart-fig-109-1822-sphenophyllites-emarginatus-brongniart-1828-sphenophyllum-emarginatum-brongniart-1828-sphenophyllum-trimcatum-brongniart-1828-rotularia-marsileaefolia-bisohofi-1862-sphenophyllum-osnabrugense-romer-this-species-of-sphenophyllum-bears-verticils-of-six-or-eight-wedge-shaped-leaves-varying-in-breadth-and-in-the-extent-of-dissection-of-the-laminae-they-are-truncate-RDBC4C.jpg)
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. Fossil plants : for students of botany and geology . Paleobotany. XI] SPHENOPHYLLUM EMARGINATUM. 407 II. Types of vegetative branches of Sphenophyllum. I. Sphenophyllum emarginatum (Brpngniart). Fig. 109. 1822. Sphenophyllites emarginatus, Brongniart', 1828. Sphenophyllum ema/rginatum, Brongniart^. 1828. Sphenophyllum trimcatum, Brongniart^. 1828. Rotularia marsileaefolia, Bisohofi'^. 1862. Sphenophyllum osnabrugense, Romer''. This species of Sphenophyllum, bears verticils of six or eight wedge-shaped leaves varying in breadth and in the extent of dissection of the laminae; they are truncated distally, and terminate in a margin characterised by blunt or obtusely- rounded teeth, each of which receives a single vein. The larger leaves are usually more or less deeply divided by a median slit. The narrow base of each leaf receives a single vein which branches repeatedly in a dichotomons manner in the substance. Fig. 109. Sphenophyllum emarginatum (Brongniart). From a specimen im the Collection of Mr. B. Kidston, Upper Coal- Measures, Eadstook. f nat. size. 1 Brongniart (22), p. 234, PI. ii. fig. 8. = Brongniart (28), p. 68. " Bischoff (28), PI. xiii. fig. 1. " Eomer, F. (62), p. 21, PI. v. fig. 2.. 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 work.. Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press