354 41. CALOPLACACEAE [ 166. Caloplaca 



2. Bombyliospora pachycheila (Tuck.) Zahlbr., Sitz. Kais. Acad. Wiss. Ill 1 : 



397. 1902. 

 Lecidea pachycheila Tuck.; Nyl., Ann. Sci. Nat. Bot. IV. 19:352. 1863. Hetero- 

 thecium tuberculosum var. pachycheilum Tuck. Heterothecium pachycheilum 

 Tuck. 

 Thallus rough, wrinkled, chinky to areolate, becoming powdery, greenish gray 

 to ashy white; apothecia middle-sized to large, 1-2.5 mm. across, subsessile, the 

 disk flat to slightly convex, reddish brown, the exciple thick, pale; hypothecium 

 reddish brown; spores ellipsoid, curved, 5-7-septate, 40-80 X 15-24 /i. 



On trees, from South Carolina and Florida throughout the Gulf states west- 

 ward to Texas. 



3. Bombyliospora porphyrites (Tuck.) Mass., Atti 1st. Veneto III. 5:262. 1860. 



Biatora porphyrites Tuck., Lich. N. E. 61. 1848. Heterothecium porphyrites 

 Tuck. B. tuberculosa var. porphyrites (Tuck.) Zahlbr. 



Thallus smooth and chinky to wrinkled, greenish gray, becoming mealy; apo- 

 thecia middle-sized to large, 1.4-5 mm. across, sessile, the disk flat to convex, red- 

 dish brown to black and usually whitish pruinose, the exciple thick, pale, becoming 

 dark, finally disappearing; hypothecium hyaline; spores ellipsoid, 2-5-septate, 

 40-70 X 16-24 ix. 



On trees, New England and New York, and southward to Florida. 



166. Caloplaca T. Fries, Lich. Scand. 1:167. 1871. 



Thallus crustose or rarely somewhat foliose, granulose, chinky, areolate, some- 

 times more or less lobed and ascending toward the circumference, rarely showing 

 differentiation into poorly developed, more or less plectenchymatous upper and 

 lower cortices of vertically extending, coherent hyphae, indistinct algal layer, and 

 poorly developed medullary layer of entangled hyphae, commonly attached to the 

 substratum by hyphal rhizoids; apothecia rarely immersed to adnate and sessile, 

 minute to small or middle-sized, the disk concave to flat or convex, the exciple thin 

 to thick, colored like the thallus; hypothecium hyaline; hymenium hyaline; paraph- 

 yses unbranched, septate, enlarged at the apices; asci clavate; spores 8 or rarely 

 less, hyaline, ellipsoid to oblong-ellipsoid, 1 -septate or rarely non-septate, the cells 

 polar. 



The algal host is Protococcus. 



A. Thallus pale or darker yellow to yellowish brown or orange, rarely gray 

 B. Thallus crustose to squamulose 



C. Thallus not lobed at the margins 

 D. On rocks and soil 

 E. Thallus crustose 



F. Thallus smooth to chinky or areolate 



G. Exciple moderately thick, becoming wavy or 

 flexuous 



H. Spores 1-septate, 12-16 X S.S-7.S n . . . 6. C. Schaereri 

 H. Spores sometimes non-septate, 14-18 X 



6.5-8 fi 5. C. flavovirescens 



G. Exciple raised, entire 



H. Spores 7-13 X 5-7 n 1- C. cinnabarina 



H. Spores 12-20 X 6-8 n 4. C. subpyracella 



F. Thallus minutely granulose 7. C. citrina 



E. Thallus squamulose 24. C. Spaldingi 



D. On trees, old wood, and rarely on rocks 

 E. Thallus smooth to chinky or areolate 



F. Thallus yellow to gray or whitish 2. C. aurantiaca 



F. Thallus yellow to orange or brownish 3. C. erythrella 



E. Thallus granulose 8. C. discolor 



C. Thallus more or less distinctly lobed at the margins 

 D. Lobes not branched or rarely so 



E. Thallus smooth to wrinkled or areolate 



