LICHENS OF THE STATE OF WASHINGTON 111 



KOH 10, L. Hageni 



Q. Thallus white or pale yellow, yellow with KOH. 



19. L. varia 



B. Apothecia immersed or adnate; disk concave to flat (Aspicilia) 

 R. Disk pruinose. 



S. On soil, moss, or bark, spores usually more than 30 /x long. 



7. L. verrucosa 



S. On rock, spores less than 30 jx long 2. L. calcarea 



R. Disk naked. 



T. Thallus yellow then brick-red with KOH. 



U. Medulla blue with IKI 1. L. alpina 



U. Medulla not blue with IKI 3. L. cinerea 



T. Thallus shows no color change with KOH. 



V. Thallus brick red or pale brick red 5. L. lacustris 



V. Thallus neither brick red nor pale brick red. 



W. Thallus rough and warty, crumbling, apothecia finally be- 

 coming adnate 4. L. gibbosa 



W. Thallus smooth, not warty, apothecia remaining immersed. 



6. L. laevata 



1. Lecanora alpina Somrft. Suppl. Fl. Lapp. 91. 1826. 



Thallus gray or bluish gray, often pale buff at the margins, crustose, 

 consisting of minute, round or irregular warty areoles, separated by rather 

 wide fissures on a black hypothallus ; yellow with KOH, then a permanent 

 reddish color, no color change with CaOCU, medulla blue with IKI. Apo- 

 thecia circular, numerous, 1-3 in an areole, 0.2-1.0 mm. in diameter, im- 

 mersed to finally emergent, and even elevated ; disk reddish black or black, 

 flat ; thalline margin concolorous with the thallus, thin, entire, rarely dis- 

 appearing; asci 8-spored; spores hyaline, ovoid, nonseptate, 8.0-13.2 x 

 7.0-9.0 At. 



On rock: Pierce Co.: Mount Rainier, Yakima Park, 6300 ft., 1931, 

 1235. Clallam Co. : Olympic Mountains, Storm King Mountain, 3500 ft., 

 A. H. Smith 2230 (W). Herre (1917) reports this lichen rare from Mt. 

 Baker, above the snow line. 



2. Lecanora calcarea (L.) Somrft. Suppl. Fl. Lapp. 102. 1826. 

 Lichen calcareus Linn. Sp. PI. 1140. 1753. 



Thallus white, greenish gray, or bluish, crustose, rough and crumbly, 

 consisting of contiguous, angular areoles, usually effigurate at the circum- 

 ference ; no color change with KOH, CaOCla, or IKI. Apothecia circular, 

 0.2-0.8 mm. in diameter, immersed to rarely adnate ; disk brown or black, 

 more or less pruinose, flat; thalline margin concolorous with the thallus, 

 thin ; asci usually 6-spored ; spores hyaline, ellipsoid to globose, nonseptate, 

 16.0-26.0 X 9.0-20.0 /x. 





