150 



PUCCINIALES 



(x) Promycelium escaping through a 

 small apical pore; I — ; Trop. Am. 

 (y) Promycelium formed, by prolifera- 

 tion of spore-apex; I — ; Japan, 

 India 

 (z) Promycelium internal; I II — ; Mi- 

 kania, Costa Rica 

 (b) Teliospores yellow to dark; aecia when 

 present with persistent, sometimes 

 rudimentary peridium 

 X. Aecia present; wall of teliospore swell- 

 ing little or not at all 

 (x) Teliospores applanate, radially ribbed 

 around a central pit; stalk strongly 

 inflated; II — ; Ipomoea, Cape 

 Colony 

 (y) Teliospores not applanate and ribbed, 

 or stalk strongly inflated 

 y. Aecia lacking; wall of teliospore swell- 

 ing strongly in water 

 (x) Exospore warted; wall swelling 

 chiefly at apex; I II — ; Sapindaceae 

 esp. 

 (y) Exospore ribbed; wall swelling uni- 

 formly; I — ; Zygophyllum, Cape 

 Colony 

 B. Telia absent 



1. Spores in aecia 



a. Aecia with cupulate peridium 



(1) Aeciospores germinating to form a pro- 



mycelium 



(2) Aeciospores not forming a promycelium 



b. Aecia not cupulate 



(1) Aecia with vesiculose peridium opening 



irregularly; Pinaceae, Ephedra 



(2) Aecia with rudimentary peridium; Mi- 



kania, Trop. Am. 



2. Spores in uredia 



a. Spores catenate (i. e., in aecia without perid- 



ium) 



(1) Spores germinating to form a pro- 



mycelium; Rubus, N. A. 



(2) Spores not forming a promycelium 



b. Spores not catenate 



(1) Uredia exserted, margined by brown in- 



curved pseudoparaphyses; Lindsaea, 

 Brazil 



(2) Uredia merely erumpent as a rule, with- 



out pseudoparaphyses 



Argomycetella D 77 



Blastospora 21:596, D 78 

 Chrysella D 78 



Trochodium 23:662. D 80 

 Uromyces 7:531, D 80; 39 



Ctenoderma 23:662, D 80 



Dichlamys 23:662, D 80 



Endophyllum 7:767, D 92 

 Aecidium 7:774, D 97 



Peridermium 7:835, D 96 

 Endophylloides, D 93 



Kunkelia 23:827. D 59 

 Caeoma 7:863, D 97 



Calidion 23:950, D 54 

 Uredo 7:838, D 98 



A. Sporogenous hyphae exserted 

 stomata; I — ; Ferns, S. A. 



Didymosporae 

 Teliospores 2-celIed, colored or hyaline 



through the 



Desmella 23:830, D 51 



