PROTOBASIDIOMYCETES 421 



bright yellow, the spores ovate, with roughened surfaces, measur- 

 ing 28-32 x 20-24 P- The teleutosori remain covered by the epi- 

 dermis, and the spores are notably distinctive in being cuneate in 

 form, with several horn-like projections on the thickened apex, and 

 with a very short pedicel. This species has also been broken up 

 into diverse forms, some of which are considered distinct species. 



Puccinia Chrysanthemi Roze. The chrysanthemum rust 1 has 

 been of some consequence in Europe and America during the 

 past fifteen years. It was common in Japan at a much earlier 

 time. The principal hosts are Chrysanthemum indicum and 

 Chrysanthemum siiicnsc. In the warmer coastal regions of Japan 

 and in Europe and America continuous generations of uredo- 

 spores may be produced. In these places teleutospores occur 

 rarely. \Yhen they occur, mesospores and irregularly formed 

 uredospores are also common. In the cooler portions of Japan 

 teleutospores are commonly found in the autumn. It would ap- 

 pear that uredospores and teleutospores are the only stages in the 

 normal life cycle of this species. In greenhouse culture this rust 

 is generally controlled by resistant stock and care in watering. 



Puccinia Tragopogi (Pers.) Cda. This species, occurring on 

 members of the genus Tragopogon, and especially on the culti- 

 vated form, Tragopogon porrifoliits, is not uncommon in gardens 

 where salsify is annually grown. It is constantly without uredo- 

 spores and exhibits the anomalous condition of producing also 

 unicellular teleutospores. There is, moreover, great variability in 

 the size of this spore form. 



Puccinia suaveolens (Pers.) Rostr. The characteristic odor, or 

 aroma, of the spermogonia is a distinctive peculiarity of this species. 

 It is considered to be a means of attracting insects, perhaps for 

 purposes of distribution. It will be recalled, however, that the sper- 

 matia are not known to be at present effective in the propagation 



1 Arthur, J. ('. Chrysanthemun Rust. Ind. Agl. Kxp. Sta. Kullt. 85 : 143-150. 

 1900. 



Jacky, E. Dc-r ( 'hrysanthemum-Rost. Zeitsch. f. I'tlanzenkr. 10 : 132-142. 

 1900. 



Kusano, S. Biology of the Chrysanthemum Rust. Hullt. Coll. Agl. Imp. I'niv. 

 Tokyo 8 : (reprint i-io). 1908. 



Roze, !:. l.c Puccinia Chrysanthemi, etc. I5ull.dc la Soc. &fyc. ik- Fiance 16. 

 88-93. 1900. 



