388 THE RUSTS OF NOVA SCOTIA. FRASER. 



M I':i,AMl'Si>KACKA K. 



I. Teliospores mostly 2- and 4-celled, in the latter case the. 

 Avails in the furm of a cross. 



1. Teliospores singly in the parenchyma tous tissue 



of the host Ureditiopsis. 



2. Teliospores united in single layered crusts 



A. Teliospores formed outside the colls 



of host Pucciniastrum. 



B. Teliospores within cells of host 



a. Life cycle with aecia and telia 



Calyptospora. 



b. Life cycle with telia, on Tsuga 



. Necium. 



IT. Teliospores 1-celled, always united in small or large 

 crusts. 



1. Teliospores formed outside the cells of host 



a. Uredinia with paraphyses intermixed with 



spores. Aecia without a peridium ... 

 Melampsora. 



b. Uredinia and aecia with peridium. No 



paraphyses Melampsoridium. 



2. Teliospores formed inside of cells of host 



a. Uredinia opening by a pore 



Melampsoo'ella. 



b. Uredinia not opening by a pore, telio- 



spores hyaline Hyalopsora. 



COI.ROSPORI AC^A K. 



1. Teliospores formed in a gelatinous swelling of sporo- 



phore, on Pinus Oallowaya. 



2. Teliospores in flat crusts, uredinia in chains 



Coleosporium. 



CRONARTIACKA K. 



1. Telia cushion shaped Ohrysomyxa. 



2. Telia thread-like or columnar . . .Cronartinm. 



