126 



i2r. 



Peculiarly-Iobed Leaves in Quercus alba, L. — The leaves 



of oak trees present so great a 

 diversity of shape and outline, 

 that any attempt to indicate 

 unusual or peculiar forms may 

 be considered superfluous. A 



great 



a 



case however, of so 

 divergence from the typical 

 form as represented in the ac- 

 companying sketch, drawn 

 from one of many similar 

 specimens in my possession, 

 may prove of sufficient interest 

 to be placed on record. 

 The tree from which 



the 



leaves were taken grows on the 

 farm of Dr. J. B, Potter at 

 Bridgeton, Cumberland Co., 

 N. J., and is now some six or 



feet in hei^fht. Its 



seven 

 leaves all 



m height, 

 have the peculiar 



ever 



lanceolate, or oblanceolate 

 outline, and narrow, mostly 

 acute lobes of the one shown 

 in the sketch, and, indeed, 

 some are still more elongated. 

 The peculiarity has existed 



since the tree was first 

 noticed, a few years ago ; 

 there are no other trees like it 

 in the vicinity, and Dr. Potter 

 has never before seen anything 

 resembling it. A number of 

 other species of Quercus grow 

 in the neighborhood, but 

 there is nothing to indicate 

 that this is a hybrid form, and 

 it probably is merely a sport 

 of the white oak. 



N. L. Britton. 



1 



§ 122. Sirablum rubescens, Gerard, in Iowa.— To-day a young 



man in one of my classes in botany brought me several specimens of 

 a plant which had excited his curiosity. Upon examination they 



, , — ^..„..vx in the Bulletin 



of the specimens showed the abnormal 

 I fail to pee any departure in the Iowa specimens 



proved to be Simblum rubescens, Gerard, described in the Bulletin 

 m January, i8So. Two 



double stipe.* 



from the form of the species so well described by Mr, Gerard, 



Ames, Iowa, Oct. 5, i88i. 



C. E. Bessey. 



* Illustrated in Plate ii. Vol. vii. 



