DISTRIBUTION OF CEDAR APPLE 27 I 



about one-half inch long and as large around as a small 

 nail. The spores when examined with the microscope are 

 seen to be slender with thin walls of a honey yellow color 

 and several septate. The alternate stage of this rust oc- 

 occurs on the Juneberry or Service berry, and is a cluster-cup 

 called a Roestelki. It distorts the small branches very much 

 and from the distorted portion the fringed cup-like processes 

 appear. This species has so far been collected only along 

 the /Atlantic coast from Massachusetts to New Jersey. On 

 March 3, 1908, while collecting in the vicinity of Mobile, 

 Alabama, I found some very fine specimens of this rust. 



The other rust occurring on the white cedar is Gymno- 

 sporangiiim biseptatiim. This rust occurs on the branches 

 which it causes to swell. The spore masses are flatter and 

 more extended than in Gymnosporangiiim ellisii. The spores 

 when examined with the microscope are seen to be much 

 stouter, darker in color, and seldom contain more than four 

 cells, usually only two or three. The alternate stage of this 

 species also occurs on the Juneberry, Amelanchier- cauadense. 

 Previous collections of this species would seem to show that 

 the rust is confined to the coast swamps from New Jersey 

 northward. On March 3, 1908, I collected a fine specimen 

 of this rust in the swamp between Mobile and Spring Hill, 

 Alabama. Now as these collections very much extend 

 the range of this species it is important to know whether it 

 occurs also along the coast swamp from Massachusetts to 

 Florida and along the Gulf coast. Of course it is possible 

 that the rust secured a foothold in the Mobile section by 

 being carried there by man, but this would seem rather im- 

 probable, not only when we consider the nature of the young 

 habitat of the white cedar, but also the nature of the rust 

 itself. It is more than likely that the fungus will be found 

 when the white cedars in the Carolinas, Florida and Virginia 

 are thoroughly examined. 



Anyone finding either of these species would contribute 

 greatly to our present knowledge of the distribution of the 



