10 



ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 492 



TABLE 3 - MEASUREMENTS OF CAULOPTERIS SPECIMENS FROM ILLINOIS 





Leaf scar 



Vascular trace 





Specimen 





Height 



Width 



H:W 



Height 



Width 



H:W 



Location 



no. 





(mm) 



(mm) 





(mm) 



(mm) 







Caulopteris 



sp. A 

















ISM 15088 





50 



53 



0.94 



30 



25 



1.2 



Braidwood 



USNM 41169 





65 



55 



1.18 



52 



30 



1.73 



Braidwood 



ISM 15739 





67 



53 



1.24 



35 



32 



1.1 



Braidwood 



PP 13778 





48 



42 



1.14 



32 



24 



1.33 



Braidwood 



ISM 15039 





77 



62 



1.24 



42 



28 



1.5 



Braidwood 



Caulopteris 



sp. B 

















P 22035 





63 



45 



1.4 



45 



25 



1.8 



? 



PP 9996 





23 



17 



1.35 



10 



6 



1.66 



Braidwood? 



PP 11830 





82 



55 



1.5 



46 



23 



2.0 



Braidwood 



Harv. 7718 





55 



35 



1.56 



35 



20 



1.75 



Morris 



ISGS PB-4457 





35 



22 



1.59 



23 



14 



1.64 



Her r in 



ISGS PB-1152 





40 



22 



1.8 



22 



11 



2.0 



Westville 



ISM 15330 





62 



34 



1.82 



45 



22 



2.05 



Braidwood 



Caulopteris 



sp. C 



l 















ISM 8666 





55 



28 



1.96 



45 



17 



2.65 



Peoria 



USNM 7125 





68 



28 



2.4 



37 



18 



2.05 



Peoria 



USNM 7125 





62 



30 



2.26 



38 



20 



1.9 



Peoria 



ISGS PB-186S 





85 



38 



2.2 



51 



18 



2.83 



Herrin 



Caulopteris 



sp. C 



2 















PP 3542 





120 



60 



2.0 



52 



22 



2.35 



Braidwood 



Langford, 1958 

















Fig. 237 





(120) 



(58) 



2.07 



(82) 



(31) 



2.6 



Braidwood 



Fig. 238 





170 



80 



2.1 



105 



40 



2.6 



Braidwood 



ISM 15803 





200 



80 



2.5 



130 



52 



2.5 



Braidwood 



Caulopteris 



sp. D 

















ISM 15512 





130 



44 



2.95 



80 



20 



4.0 



Braidwood 



Caulopteris wortheni Lesquereux, 1866 

 Text fig. 7, F; pi. 3, fig. 2 



The scar is narrow toward one end, and the vascular bundle is 

 not completely visible. Thus the proper orientation is uncertain. Be- 

 cause there is an indented groove in the stem, starting at the open end 

 of the scar (pi. 3, fig. 2), it would appear that the open end was to- 

 ward the top. However, if we interpret the internal trace as similar 

 to the traces seen in Caulopteris species B and D (text fig. 7), the 

 wider side would be toward the top. The latter interpretation was used 

 for text figure 7, F. 



The specimen was found near Carmi in White County, Illinois, and 

 is probably from the Bond or Mattoon Formation. Only the holotype of 

 this species (ISM 1747) is known. It was redescribed and discussed by 

 Janssen (1940). 



