4IO PLANT DISEASES 



on the leaves, spores elliptical or ovoid, 15-24x13-18 fj., 

 aculeate, orange rufous, paraphyses numerous, clavate ; 

 teleutospore sori hypophyllous, very numerous, rufous- 

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

 43-55 X"-i 2 iJ.. 



Melampsora lini, Tul., Ann. Set. 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, 17-20 /*; teleutospore sori 

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

 densely packed under the epidermis, cylindrico-prismatic, 

 45-60 X 1 7-20 /i. 



Puccinia, Pers. — Aecidia, sperraogonia, and uredospores 

 as in Uromyces; teleutospores transversely r-septafe, 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.) 



t Auto-Eupuccinia, De Bary. — Sperraogonia, aecidia, 

 uredospores, and teleutospores produced on the same 

 host. 



Puccinia asparagi, T).Q,.,Flor. Fr.\\.T^. 595. — Spermogonia 

 in small clusters ; aecidia forming longitudinal lines on the 

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

 delicately verruculose, contents yellow ; uredospores 20-30 

 X 17-25 ft, delicately echinulate, pale brown; teleutospores 



