k2 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 500 



The Noeggerathiales, a very rare group, make up more than 20 percent of 

 the specimens. The plants represented in the Spencer Farm Flora -were 

 growing on calcareous soils surrounding the ravine in which they were 

 deposited. They are an extrabasinal (= "upland") flora which is distinct 

 from the basinal floras found in roof shales. 



k) It is suggested here that the Noeggerathiales should perhaps 

 be classified as Progymno sperms . The noeggerathialian cones could be 

 derived from Archaeopteris-llke fructifications. Within the noeggera- 

 thialian cones a possibly evolutionary trend can be seen from Noeggera- 

 thiostrobus to Lacoea to Discinites. 



5) Several organic connections are suspected. Mesocalamites cf. 

 cistiiformis was found in organic connection with C 'alamo st achy s andanen- 

 sis. Lacoea seriata and Palaeopteridium reussii might belong together. 

 Eusphenopteris morrowensis has been found with a Lagenospermum (= Nudos- 

 permum) seed and a Tel angiopsis- like male fructification. It is sus- 

 pected that they belong together. Eusphenopteris morrowensis is in some 

 characters comparable to coal ball material of Schopfiastrum decussatum. 



6) Two new species, Lesleya cheimarosa and Rhodeopteridium 

 phillipsii, are described; Gulpenia limhurgensis is reported for the 

 first time in this country. 



REFERENCES 



Abbott, M. L., 1958, The American species of Asterophyllites, Annularia, and Spheno- 

 phyllum: Bulletins of American Paleontology, v. 38, no. 17^, p. 285-390, 5 

 tables, lU pis. 



Amerom, H. W. J. van, 1975, Die eusphenopteridischen Pteridophyllen aus der Sammlung 

 des Geologischen Bureaus in Heerlen, unter besonderer Berucksichtigung ihrer 

 Stratigraphie bezuglich des siidlimburger Kohlenreviers : Mededelingen Rijks 

 Geologische Dienst, Serie C-III-l-No. 7, 208 p., k8 pis. 



Andrews, E. B., 1875, Description of fossil plants from the coal measures of Ohio: 



Report of the Geological Survey of Ohio, v. 2, pt. 2, p. klk-k26, pis. U6-53. 



Arnold, C. A., 193^, A preliminary study of the fossil flora of the Michigan coal basin: 

 Contributions from the Museum of Paleontology, University of Michigan, v. k, 

 no. 11, p. 177-20U. 



Arnold, C. A., 19^7, An introduction to paleobotany: New York, McGraw-Hill Book Co., 

 Inc. , ^33 p. 



Arnold, C. A., 19^9, Fossil flora of the Michigan coal basin: Contributions from the 

 Museum of Paleontology, University of Michigan, v. 7, no. 9, p. 131-269, 3U 

 pis . 



Arnold, C. A., 1953, Fossil plants of early Pennsylvanian type from central Oregon: 

 Palaeontographica B, v. 93, p. 6l-68, 5 figs., 2 pis. 



Bailey, L. W., I.865, Observations on the geology of southern New Brunswick: Frederic- 

 ton, 130 p. (With appendices A and B by C. F. Hartt.) 



Beck, C. B., 1976, Current status of the Progymnospermopsida: Review of Palaeobotany 

 and Palynology, v. 21, p. 5-23, 2 figs. 



Bell, W. A., 19 ] i0, The Pictou coalfield: Geological Survey of Canada Memoir no. 225, 

 160 p.. , 10 pis. 



