3 (2) Lobes Hattcncd and 1 mm or more broad (Fig. 13) Xanthona panctina 



Figure I.V— Thnlliis of Xanthoria parivtina. Si'uk' is 1 

 rum. 



3 {2) Lobes nodular-convex, lobes less than 1 mm wide (Fig. 14) Xanthona elef^ans 



Figure 14.— Thallus of Xanthoria elegans. Scale is 

 mm. 



1^ 



is-~r 



4 (/) Ascocarp an apothecium (Fig. ^). thallus light (shades of white, gray, or yellow orange) 5 



4 (/) Aseoearp a pentheeium (Fig. 10); occasionally more or less immersed with only ostiole showing; thallus dark 



(shades of green, brown, or black) or apparently absent 9 



5 (4) Thallus whitish to gray, KOH + yellow; spores colorless, one-celled (Fig. 13), 11-18 v 6-8. 5^m Lecanoni gninlii 



Figure 15.— One-celled spiire. .Stale is 

 lOiim. 



5 {4] Thallus yellow orange. KOH + puiple; spores colorless, polarilocular (Fig. 16) 6 



Figure 16. 



ularihieuhir sport. .Stale is 

 lO/im. 



