THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 99 



3. BACIDIA N^GELII (Hepp.) A. Zahlbr. 



Biatora ncBgelii Hepp. Exiscc. no. 19. 1853. 



Biatora nagelii Tuck. Syn. N. Am. Lich. II: 36. 1888. 



Bacidia ncegelii A. Zahlbr. Ascolichenes, 135. 1907. 



Thallus of minute, thickish, scale-like granules, forming a more or 

 less chinky crust, or occasionally thin; color ashy gray or greenish 

 ashen; KOH - ; CaCl 2 O 2 - . 



Apothecia numerous, minute to small, sessile, circular, at first 

 plane but very soon becoming strongly convex and excluding the 

 thin, entire, scarcely evident margin; color a clouded flesh-color as 

 nearly as can be defined, soon darkening and then blackening; para- 

 physes distinct but coherent, slender; hypothecium clear; thecium 



6 7X 

 blue with I; spores spindle-shaped to ellipsoid, j;with 



i, 2, 3, 4 septa, mostly 4-locular. Dr. Zahlbruckner states in 

 Ascolichenes "sporen bis 8 zellig" but I find none with more than 5. 

 Th. Fries states, Lich. Scand. II: p. 379, "sporae primitus simplices, 

 dein 2-4, raro 6-8 blastae." 



On bark of Umbellularia and other trees, mixed with Lecania 

 dimera, Catillaria tricolor, and other lichens. 



A bark lichen of both Europe and North America. (Named for 

 Karl Wilhelm von Naegeli, botanist and philosopher, professor at 

 Munich from 1858 to 1891.) 



4. BACIDIA AKOMPSA (Tuck.) Herre. 



Biatora akompsa Tuck. Syn. N. Am. Lich. II: 47. 1888. 



Thallus pale ash-colored to dusky greenish ash-colored, effuse, 

 interruptedly granulose or scurfy, as if poorly developed; no chemi- 

 cal reaction evident. 



Apothecia scattered, small to minute, sessile; disk dull black, more 

 or less convex; margin thin, indistinct; epi thecium pale grayish 

 brown; paraphyses coherent, hair-like; hypothecium colorless; asci 

 clavate or narrowly spatulate; spores needle-shaped, 4 to 5 locular, 



2 3 1.5-2.5 



/*; according to Tuck., - //; thecium not colored 

 io 20 18 24 



by iodine. 



