6 (5) Thallus covered with globose isidia (Fig. 17); spores 9-14 x 4-6;im Culophica vemiculifei 



Figurt 17.— Thallus of Caloplaca verruculifera. 

 Scale is lU mm. 



6 (5) Thallus without isidia 7 



7 (<S) Thallus forming circular patches with radiating lobes (Fig. 18); spores 10-15 x 5-7;(m Caloplaca scopularis 



Figure 18.— Thallus of Caloplaca scnpularis 

 Scale is 10 mm. 



7 (6) Thallus irregular, composed of scattered lobes or numerous granules . 



8 {7) Thallus citrine of granules 1-3 mm diameter (Fig. 19). spores 10-18 x 5-8f(m Caloplaca inicrothalUna 



F'igure 19.— Thallus of Caloplaca microthalUna. 

 Scale is 10 mm. 





1 (7) Thallus orange yellow, marginal lobules subconvex oriented in radiating manner; .spores 10-14 x 5-7;im (Fig. 20) 



Caloplaca marina 



Figure 20.— Thallus of Caloplaca marina. Scale is 

 I mm. 



I I 



