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 p. ; paraphyses 

 clavate, orange; uredospore sori minute, scattered or 

 circularly arranged, yellow, spores aculeate, orange, 16-22 ft ; 

 teleutospore sori hypophyllous, minute, black ; teleutospores 

 oblong, apiculate, warted, 5-io-septate, black, opaque, 

 90-140X20-35 p., pedicel slightly incrassated below, 

 110-160 X 17-20 /*. 



Phragmidium subcorticatum, Winter, Krypt.-Fl.^..^. 228. 

 Aecidia hypophyllous, effused, various in form, often 

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

 spores irregularly globose; epispore hyaline, contents orange, 

 aculeolate, 1 7-28 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 

 IJL, 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, 75-100X26-30 p, pedicel 100-120 /u, 

 long, thickened in the middle up to 22 p. 



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., Summa Veg., p. 512. 

 Spermogonia scattered ; aecidia of two forms, one solitary 

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



