Vol. 28 



No. 9 



BULLETIN 



OF THE 



TORREY BOTANICAL CLUB 



SEPTEMBER 1901 



The Origin of Stipules in Liriodendron 



By Edward W. Berry 



(With Plates 41, 42) 



Arth 



dron from the Laramie formation at Walsenberg, Colorado, under 

 the name of Liriodendron alatum, a manuscript name given the 

 specimen by the late Professor J. S. Newberry. It was a large leaf, 

 oblong in outline, with a deeply emarginate apex, and had con- 

 spicuously winged petioles. In the same paper a form of Lirio- 

 phyllnm populoides Lesq. was described from the Dakota formation, 

 with similarly winged petioles ; and Dr. Hollick was led to sug- 

 gest from these two instances that the large fugacious stipules of 

 our living tulip-tree might represent former leaf-lobes, which, be- 

 coming separated, formed basilar lobes, then winged petioles, and 

 finally the modern stipules. 



In a subsequent paper f he describes two specimens of leaves 

 of Liriodendron Tulipifera Linn., which serve, in a measure, to 

 substantiate this view although it was sharply assailed by Theo. 



X 



ha 



Somewhat similar petiolar appendages in the genus Plata mis 



Ward 



papers,§ and his conclusion that the large foliar stipules of the 



Bull. Torr. Club, 21 : 467-471.//. 220,221. 1894. 

 t Ibid., 23: 249, 250.//. 269,270. 1896. 



JBot. Gazette, 20: 312. 1895. 



i Palaeontologic Hist, of the Genus Platanus, Proc. U. S. Xat. Mus. 11 : 39-42 

 /'- 17-22. 1888. Origin of Plane Trees, Am. Nat. 24 : 797-810. //. 28. 1890. 



[Issued 30 September] 493 



