4io PLANT DISEASES 



on the leaves, spores elliptical or ovoid, I5-24X 13-18 ^u, 

 aculeate, orange rufous, paraphyses numerous, clavate; 

 teleutospore sori hypophyllous, very numerous, rufous- 

 brown at first, then pitch-brown, crustlike teleutospores, 

 43-55Xn-i2/x. 



Melampsora lini, Tul., Ann. Sci. Nat, 1854, p. 93. 

 Uredospore sori scattered, covered with a deciduous 

 pseudoperidium, rotund, orange, minute; spores sub- 

 globose or obovoid, pedicellate, echinate, 15-24x14-18 /x, 

 orange-yellow ; paraphyses curved, apex strongly sphae- 

 roidally or ovoidly incrassated, iy-2o/x; teleutospore sori 

 flattened, at first rufous-brown, then blackish ; teleutospores 

 densely packed under the epidermis, cylindrico-prismatic, 

 45-60 x 1 7-20 /A. 



Puccinia, Pers. Aecidia, spermogonia, and uredospores 

 as in Uromyces ; teleutospores transversely i-septate, rarely 

 2-septate, each cell having one germ-pore ; sori flattened or 

 convex, at first covered by the epidermis of the host; 

 sporidiola ovoid or reniform, generally hyaline. 



* Eupuccinia, Schrot. Spermogonia, aecidia, uredo- 

 spores, and teleutospores produced in a living host ; 

 teleutospores germinating after a period of rest. (Not 

 on a living host.) 



f Auto-Eupuccinia, De Bary. Spermogonia, aecidia, 

 uredospores, and teleutospores produced on the same 

 host. 



Puccinia asparagi, D.C.,JF7or.Fr.ii.p. 595. Spermogonia 

 in small clusters ; aecidia forming longitudinal lines on the 

 stem, margin whitish, torn; spores 15-28^, epispore hyaline, 

 delicately verruculose, contents yellow ; uredospores 20-30 

 X 17-25 /u, delicately echinulate, pale brown; teleutospores 



