LICHENS OF THE STATE OF WASHINGTON 163 



C. Lobes not branched 8- C. lobulata 



B. Thallus not marginally lobed or subfoliose. 



E. ThalHne margin crenulate or wavy, rarely disappearing ; 



black hypothallus often visible 1. C. aurantiaca 



E. Thalline margin granulose, often disappearing ; hypothallus 



white not often visible 3. C. citrina 



A. Thallus grayish white, olive brown or brown. 



F. Hypothallus usually evident, bluish black to black. 



G. Disk of apothecium rusty-red to black 4. C. ferruginea 



G. Disk of apothecium lemon-yellow to orange 2. C. cerina 



F. Hypothallus not usually evident. 



H. On soil, encrusting mosses or other lichens 5. C. jungermanniae 



H. On rock, trees, or old wood 6. C. pyracea 



1. Caloplaca aurantiaca (Lightf.) Th. Fr. Nova Acta Reg. Soc. Sci. 



Upsal. ser. 3. 3 :219. 1861. 

 Lichen aurantiacus Lightf. Fl. Scot. 2:810. 1777. 

 Placodium aurantiacum (Lightf.) Anzi. 



Thallus well developed, lemon yellow (R), orange, or rarely gray, 

 crustose, continuous or areolate, warty and wrinkled, often bordering black 

 hypothallus visible. Apothecia numerous, 0.5-1.5 mm. in diameter, 

 crowded, adnate to sessile; disk ochraceous-orange or brownish, flat to 

 concave ; thalline margin crenulate, sometimes becoming wavy, often raised, 

 rarely disappearing; spores hyaHne, ellipsoid, polar-bilocular, 10.0-13.5 x 

 4.9-6.6 /x. Both epithecium and thallus purple with KOH. 



On bark, old wood, or rock : San Juan Co. : San Juan Island, English 

 Camp, 1928, 2065; Ft. Caution, 1928, 2090. Clallam Co. : Port Angeles, 

 1914, Foster 2887 (W). Washington Territory, Columbia River, 1881, 

 Suksdorf 24 (F). 



2. Caloplaca cerina (Ehrh.) Th. Fr. Nova Acta Reg. Soc. Sci. Upsal. 



ser. 3, 3:218. 1861. 

 Lichen cerinus Ehrh. in Hoffm. Descript. et Adumbrat. PI. Lich. 2 :62. 



1789. 

 Placodium cerinum (Ehrh.) Naeg. 



Thallus grayish-white (R) or brownish, smooth, crustose, thin or 

 scurfy, becoming verrucose, effuse or chinky, and finally sub-areolate, a 

 bluish-black hypothallus often visible. Apothecia numerous, 0.2-0.5 mm. in 

 diameter, adnate to sessile; disk lemon-yellow (R), ochraceous-orange 

 (R), or reddish, subpruinose, slightly concave to convex; thalline margin 

 lighter or concolorous with the thallus, often the same color as disk, some- 

 times raised, entire or becoming wavy; spores hyaline, ellipsoid, polar- 

 bilocular, 10.0-16.5 X 6.2-9.9 fi. Epithecium bright crimson with KOH, 

 color change of thallus is very slight with KOH. 



On bark, mosses, rarely on old wood and rock : San Juan Co. : Turn 

 Island, 1928, 2108; San Juan Island, Pt. Caution, 1928, 2089. Kittitas 



