272 The Upper Cretaceous Floras of the World 



paleobotanical contributions have been by Hampe, 1 Dunker, 2 Stiehler," 



Heer,' Schulze, 1 Lampe," and Riehter. 7 In 1884 Vater s worked over a 



large collection of petrified woods from the so-called Phosphoritlager von 



Harzburg und der Helmstedter Mulde. These woods are obviously all 



or in part reworked in the Oligocene deposits in which they are found, 



and Vater concluded that they came from the Upper Cretaceous or older 



rocks of the region. Nineteen species were differentiated and these are 



all included in the following list, although in the case of forms like 



Fegonium, Tcenioxylon, etc., their exact age is uncertain. 



There has been considerable discussion regarding the exact correlation 



of these beds with the more fossiliferous horizons of Ehenish Prussia and 



Westphalia. Schulze in 1888 enumerated the following four horizons : 



Ilsentmrgmergel 

 Heimburggestein 

 Subhercynischen Senonquader 

 Salzberggestein 



'Hampe, E., Vortrag uber Petrefacten der Kreideformation (Quadersand- 

 stein) bei Blankenburg., Bericht. naturwiss. Vereins Harzes, 1852, pp. 6-7. 

 Ibidem, 1853-54, p. 12. 



2 Dunker, W., Ueber mehre Pflanzenreste aus dem Quadersandstein von 

 Blankenburg, Pakeont, Bd. iv, 1856, pp. 179-183, pi. xxxii-xxxv. 



3 Stiehler, A. W., Ueber fossile Pflanzen aus der Kreideformation von Qued- 

 linburg, Bericht. Deutsch. Naturf. Vers. Bd. xxxi, 1854, pp. 69-71. 



Die Flora im Quadersandstein des Langenberges bei Quedlinburg, Zeits. 

 Naturwiss. Halle, Bd. ix, 1857, pp. 452-455. 



Beitrage zur Flora der oberen Kreide Quedlinburgs und seiner Umgebung, 

 I. Allgemeine Bemerkungen fiber das Kreidegebirge zu Blankenburg und in 

 der Grafschaft Wernigerode. Palseont. Bd. v, 1858, pp. 45-70, pi. ix-xi. II. Die 

 Flora des Langebirges bei Quedlinburg. Ibidem, Bd. v, 1858, pp. 71-80, pi. 

 xii-xv. 



4 Heer, 0., Beitrage zur Kreideflora, II. Kreideflora von Quedlinburg, Neue 

 Denks. Schweiz. Gesell. Naturwiss. Bd. xxiv, 1869, No. 2, pp. 1-15, pi. i-iii. 



5 Schulze, E., Ueber die Flora der subhercynischen Kreide. Zeits. gesammt. 

 Naturwiss., Halle, Bd. Ix, 1887, pp. 440-470. 



Inaugural Dissertation, Halle, 1S88, 33 pp. 



8 Lampe, E., Ueber neue Fundorte der subhercynischen Flora. Zeits. ges- 

 ammt. Naturwiss., Halle, Bd. lxvii, 1894, pp. 193-198. 



7 Riehter, P., Ueber Quedlinburg Kreide-Coniferen. Zeits. deutsch geol. 

 Gesell. Bd. li, Verhandl., pp. 43-44, 1899 (1900). 



Beitrage zur Flora der oberen Kreide Quedlinburgs und seiner Umgebung, 



