394 



HERRE 



1. DERMATOCARPON MINIATUM (L.) Mann. 



Thallus medium to large, smooth, coriaceous, one-leaved or 

 lobate, the margin rounded, undulate or crenate, and more or 

 less recurved ; attached by an umbilicus ; color whitish to bluish 

 gray or occasionally brownish ; sometimes granulose pruinose ; 

 beneath varying from a bright to a dark brown or black ; smooth 

 or minutely pustulate. Apothecia very numerous, minute, scat- 

 tered, immersed in the thallus ; opening by small dark or brown 

 pores, which appear as specks thickly distributed over the en- 

 tire surface. Spores simple, colorless, ellipsoid. 



On rocks, in shaded or damp situations. 



A common and conspicuous lichen throughout the foothills 

 and to the summit of the Santa Cruz range, the thallus reaching 

 a diameter of more than two inches. 

 Lichen niiniatus L. Sp. PI. 2: 1149. i753« 

 Der?natocar^on ininiattun Mann. 



2. DERMATOCARPON MINIATUM COMPLI- 



CATUM (Sw.). 



Thallus small to medium, polyphyllous, densely compacted, 

 the imbricate and complicate lobes rotund, convolute and more 

 or less ascendant, with recurved margin ; the surface more or 

 less roughened and wrinkled. Otherwise like the species. 



Common in the foothills with the species. 

 Lichen coinplicatus Swartz, Nova Act. Upsal. 4: 38. 1776. 

 Dcf'nialocarpon niiniatimi complicaUim. 



3. DERMATOCARPON AQiJATICUM (Weis.). 



Thallus small, thick, smooth, lobes densely imbricate and 

 compacted ; margin rounded, entire or crenate-lobulate ; closely 

 appressed, umbilicate ; resembling an intricately convolute, ad- 

 nate, crustaceous lichen ; color dull gray or olive-brown ; some- 

 times white granulose pruinose ; beneath dark brown to dingy 

 black ; smooth. Apothecia as in Dermatocarpon miniatum^ 

 but proportionately larger and less numerous. 



Abundant on granite cliffs 200 feet above the sea, near Point 

 San Pedro. Occurring also on wet sandstone in Devils Canon, 

 altitude 2300 feet. 



Lichen aqiiaticus Weis, PI. Crypt. 77. 1772. 

 Dennatocarpon aquaticum . 



