LICHENS OF SANTA CRUZ PENINSULA 349 



Apothecia small and very numerous, sometimes covering the 

 Ihallus ; disk concolorous or orange. 



On trees. Common in the valleys and lower foothills. 

 Lichen folycarpiis Ehrhart, Plant. Crypt. Exs. No. 136. 1785. 

 TheloschistcspolycarpiisTxxck. Syn. N. Am. Lich. i : 50. 1882. 



4. THELOSCHISTES LYCHNEUS LACINIOSA Schaer. 



Thallus foliaceous, appressed, orbicular or stellate, expanded ; 

 lobes much and intricately dissected, their tips ascendant and 

 more or less fibrillose ; lobes either smooth or with granulose, 

 powdery margins. Apothecia abundant, medium to large, their 

 'disks dark orange ; margins entire or minutely crenulate ; color 

 of thallus yellow to orange, rarely greenish to whitish ; beneath 

 white or greenish white, with scattered fibrils of the same color. 



Habitat, trees and dead wood ; especially noticeable on y^s- 

 culus calif ornica. 



Very abundant in the valleys and foothills. 



5. THELOSCHISTES RAMULOSUS Tuck. 



Thallus small, effuse, closely appressed ; the minute and 

 scattered lobules but little divided ; color pale yellow to greenish 

 yellow. Apothecia very small, entire, concolorous, or at length 

 orange. 



On trees and shrubs, in the valleys and foothills. 



My specimens were obtained from a pepper tree {Schimis 

 molle) in Mayfield, growing with Tlieloschistes concolor and 

 Theloschistes ■polycarpus. 



This insignificant little plant is readily overlooked. It re- 

 sembles ThcloscJiistes coticolor, from which it may be best dis- 

 tinguished by the difference in spores. 



According to Dr. Zahlbruckner this species is only a variety 

 of Xantho7-ia lychnea. 



Theloschistes ramtilosus Tuck. Syn. N. Am. Lich. i : 51. 1882. 

 Xanthoria lychnea ranmlosa ]. Miill. 



6. THELOSCHISTES CONCOLOR (Dicks.) Tuck. 



Thallus foliaceous, appressed, the narrow lobes more or less 

 dissected ; quite small ; color yellow, greenish yellow, or pale ; 

 often an ashy white. Apothecia small, yellow to orange ; 

 spores numerous, 20 to 60 in the thekes, simple or one-septate. 



