liii) THK KISTS OF NOVA SCOTIA. Kit Asr:i;. 



the nivceliuin produced hy basidiosporc infection develops 

 ]\ycnia followed by aecia, later the urediniospores appear, and 

 finally the teliosporos. Any of these forms may be omitted 

 except the teliospores and basidiospores. The llomau numerals 

 I, II, III, are n.^ed to rein'esent, respectively, the aecia, 

 urediuia and telia, and a cipher i-; used for the ])ycuia. The 

 order of development and the su]ipression of the s]")orc forms 

 may be represented as follow : 



Complete series, 0, I, II, III. 



Uredinia Avanting, 0, I, — , Til. 



Aecia wanting, 0, — . II, TIT. 



Aecia and uredinia wanting, 0, — , — , III. 



Not enough attention has been given to the presence or 

 absence of the pycnia to be sure of the number of series, but 

 it is ])r(jbable that there is nl-o llio following series: 



Pycnia and aecia wanting, — , ■ — -, II, III. 



Pycnia, aecia and uredinia wanting, — , — , — . III. 



Schroeter has proposed names for the different types of 

 association of spore forms. Taking th(> genus Puccinia for 

 example, and it may be used for other genera as well, tlio types 

 would be as follows : 



]Mi-])uccinia, comy)h'te series, 0, I, IF. TIF. 



Pucciniitpsis, luvMlinia omitted, d. F. — , III. 



BrachA'-puccinia. pycnia and aecia wanting, — , — , IT. TIL 



^Ficro-puccinia, pycnia, aecia and uredinia wanting. — , — , 

 — , TIT. (Teliospores germinating only after a period of rest). 



Lepto-puccinia, ]m'nia, aecia and uredinia wanting, — , — , 

 — , III. (Telios])ores gerininating iuimediately). 



Duggar suggests terms applicable to all genera having 

 similar sj)ore forms, and at the same time expressing 

 het^roecism and autoecisui. Tie emphiys the word uredo as the 

 common root in com])ination with the prefixes used by 

 Schroeter. Thus a form that i-; eu-heteroecious will be termed 



