UREDINACEAE 419 



p. 52. — Aecidia generally hypophyllous, rarely on petiole or 

 stem, in chrome-yellow, orbicular groups having the centre 

 depressed, or forming oblong pustules on petiole and stem ; 

 aecidiospores aculeolate, orange-yellow, 20-28 ju ; paraphyses 

 clavate, orange ; uredospore sori minute, scattered or 

 circularly arranged, yellow, spores aculeate, orange, 16-22 /i ; 

 teleutospore sori hypophyllous, minute, black ; teleutospores 

 oblong, apiculate, warted, s-io-septate, black, opaque, 

 90-140X20-35 fi, pedicel slightly incrassated below, 

 110-160X 17-20 fi. 



Plragmidium subcorticatum. Winter, X?7//.-i^/.,i. p. 228. 

 — Aecidia hypophyllous, effused, various in form, often 

 confluent, reddish-orange becoming pale, large, aecidio- 

 spores irregularly globose; epispore hyaline, contents orange, 

 aculeolate, 17-28 X 12-20 /*; uredospore sori soon naked, 

 hypophyllous, scattered or crowded, on pale spots, orbicular, 

 yellow, minute ; uredospores variable in form, 17-32 x 12-24 

 H, delicately aculeolate; teleutospore sori hypophyllous, 

 scattered or aggregated, orbicular, black, minute ; teleuto- 

 spores oblong, obtuse with a white apiculus, 3-8-septate, 

 verrucose, dark brown, 75-100 x 26-30 fi, pedicel 100-120 //. 

 long, thickened in the middle up to 22 /*. 



Coleosporium, Lev. — Spermogonia and aecidia developed 

 on leaves of conifers ; uredospores at first grouped in 

 moniliform series, orange or yellow, echinulate; teleuto- 

 spores transversely 3 to many-septate, forming a flat, some- 

 what mucous, orange or yellow, flat layer, closely compacted, 

 on living host plant ; sporidiola large. 



Coleosporium senecionis, Fr., Sumtna Veg., p. 512. — 

 Spermogonia scattered ; aecidia of two forms, one solitary 

 or few in number, on the leaves, cylindrical, up to 2 '5 mm. 



