71 
Crossosoma 34(2), Fall-Winter 2008 
Usnea esperantiana Clerc - Corticolous. Green Mountain, Nash 41206 (ASU). 
Usnea flavocardia Rasanen - Corticolous. San Miguel Hill, Knudsen 6708 
(UCR); Green Mountain, Knudsen 6713 (UCR); upper Willow Canyon, Knudsen 
6726.1 (UCR). 
Usnea lapponica Vain. - Corticolous. San Miguel Hill, Knudsen 6703, 6753 
(UCR); near ranger’s station, Knudsen 6935 (UCR); upper Willow Canyon, 
Knudsen 6726.2 (UCR); Green Mountain, Knudsen 6695 (UCR). 
Usnea rubicunda Stirton - Coticolous. Near ranger’s station, Knudsen 6713 
(UCR); San Miguel Hill, Knudsen 6786.1 (UCR), Nash 1195 (ASU). 
Verrucaria calkinsiana Servit- Saxicolous. Green Mountain, Nash41448 (ASU). 
Verrucaria cetera Breuss - Saxicolous. Green Mountain, Nash 41414 (ASU). 
Verrucaria floerkeana Dalla Torre & Sarnth - Saxicolous. The Gangplanks, Nash 
41098 (ASU). 
Verrucaria furfuracea (B. de Lesd.) Breuss - Saxicolous. Between San Miguel 
Hill and Green Mountain, Knudsen 6702(UCR); Green Mountain, Knudsen 6790, 
6791.2 (UCR); trail to Caldwell Point, Knudsen 6728 (UCR). This species is 
common on caliche, isidiate and rarely fertile 
Verrucaria mimicrans Servit - Saxicolous. Near Willow Canyon, Knudsen 6883 
(UCR); San Miguel Hill, Knudsen 6755 (UCR); along trail to Harris Point, Nash 
41131 (ASU). 
Verrucaria muralis Ach. - Saxicolous. Willow Canyon, Knudsen 6968 (UCR); 
Green Mountain, Knudsen 6752 (UCR), Nash 41450 (ASU); San Miguel Hill, 
Knudsen 6699 (UCR). 
Verrucaria papillosa Ach. - Saxicolous. Near ranger’s station, Knudsen 6724 
(UCR); Nidever Canyon, Knudsen 6879 (UCR); Green Mountain, Nash 41204, 
41203 (ASU). 
Verrucaria subdivisa Breuss - Saxicolous. Nidever Canyon, Knudsen 6891 
(UCR); Willow Canyon, Knudsen 6990.2, 6962, 6963 (UCR); Green Mountain, 
Knudsen 6785 (UCR); trail to Caldwell Point, Knudsen 6743 (UCR); Lester 
Point, Nash 41152 (ASU). 
