HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA, 113 
'Thallus not fruticulose—Continued. 
Thallus crustaceous—Continued. 
Not effuse. 
Chinky or coarsely areolate, yellowish gray....... 1. C. aurantiaca. 
Smooth and continuous, gray........-.-.-------- 3. C. cerina. 
Thallus squamulose. 
Radiate at the periphery. 
Yellow......-.-.-22-0 0-22 e ee eee eee eee cece eee 8. C. cirrochroa, 
Orange. 
Radii linear, torulose..........-.---------+---- 11. C. elegans. 
Radii not torulose, flattened at periphery..... 10. C. murorum. 
Not radiate at the periphery. 
Squamules white to orange. 
White or pale yellow........-.---.-------+-- 7. C. fulgens. 
Orange. 
Minute...........------------+-22ee2 eee 6. C. microphyllina. 
Not minute, convex, round or lobulate... 9. C. bolacina. 
Squamules dark to blackish. 
Margin of disk white.........--------+--++--- 2. C. variabilis. 
Margin of disk dark.......-..--.----------+- 12. C. pellodella. 
1. Caloplaca aurantiaca (Lightf.) T. Fries. 
Thallus coarsely granular and verruculose-areolate, pale citrine yellow or grayish 
yellow, surrounded by a thin black hypothalline border or this indistinct, KHO+ dark 
crimson, Ca(ClO),—; apothecia sessile, often crowded, 0.5 to 2 mm. wide; disk con- 
cave to flat, orange, the citrine yellow thalline margin prominent and persistent, entire 
to finally crenulate and, at times, at last sinuate;, epithecium subgranulose, orange 
yellow, with KHO purple, as also the heads of the paraphyses; thecium colorless, with 
iodine deep blue; paraphyses coherent, yellow-capitate; hypothecium milky white; 
asci clavate; spores 8, ellipsoid, 10 to 15 p long, 4.5 to 8» thick, polari-bilocular with a 
long isthmus. 
On various barks, living or dead, and on rocks. Frequent throughout San Clemente 
Island, Trask; cortex of dead Opuntia, Newport; on Santa Catalina Island. Cosmo- 
politan. | 
2. Caloplaca variabilis (Pers.) T. Fries. 
Thallus determinate, dark ash color, blackening, rimose-verruculose in the center, 
squamose at the periphery, the squamules crenulate, KHO-+ violet; apothecia adnate, 
0.25 or 1 mm. wide; disk flat, color of thallus, the thalline margin entire or finely 
crenulate, thin, whitish or light gray; epithecium gray, with KHO-+ violet; thecium 
colorless, with iodine blue; paraphyses loosely coherent; the tips with one or two 
enlargements and a globular head, the latter colored in some paraphyses, septate below 
the heads, some furcate; hypothecium pale grayish; asci inflated-clavate, 60 to 72 p 
long, 20 to 24 » thick; spores 8, blunt-ellipsoid, 15 to 22 u long, 5 to 9 » thick, polari- 
bilocular, the loculi approximate, with or without an isthmus; upper third of asci dark, 
the lower part light blue with iodine, later with the spores turning yellowish. 
On sandstone in the Santa Monica Range; on the same substratum near Marietta, 
Riverside County. Has not been collected at higher elevations. 
3. Caloplaca cerina (Ehrh.) Zahlbr. in Engl. & Prantl, Nat. Pflanzenfam. 11*: 228. 
1907. 
Lichen cerinus Ehrh. Pl. Crypt. Dec. no. 216. 1785. 
Thallus thin, effuse, whitish ash-colored, smoothish, or else absent, with KHO 
tardily pale red; apothecia, sessile, small, not over 0.56 mm. wide, crowded in groups; 
disk flat, light orange, the thalline margin yellowish white, thin, persistent, with KHO 
