279 BOTANICAL GAZETTE [APRIL 
Arthopyrenia halodytes (Nyl.) Oliv.; Buellia halonia (Ach.) Tuck.; Den- 
drographa minor (Tuck.) Darbish. 
Dirina franciscana A. Zahlbruckner, n. sp.—Thallus effuse, of thick, rounded, 
irregular tuberculate areoles, uniform crustaceous, sub-cartilaginous, forming 
heaped patches. Color varying from ea or brownish yellow to a dingy 
ashy gray, the last most common; K— 
Apothecia numerous, of medium size, ere elevated, sessile; surface of 
disk minutely granular, ashy-gray pruinose; the thalline margin thick, prominent, 
white, obtuse, soon flexuous, often intricately so; epithecium dark, 56 » high; 
hypothecium black, thick, 140 high, blue or bluish with I; paraphyses 
typical of the genus, thecium wine-red with I; asci clavate, straight or curved, 
long-stalked, aa #; spores eight, colorless, fusiform, straight or slightly 
curv_d, quadrilocular, ASS 
On rocks 50 to 75 feet above the sea at Point Lobos, San Francisco, growing 
with Dendrographa minor. 
Near Dirina repanda of Europe and Northern Africa, but with a thicker and 
differently colored thallus and with different spores. 
Lecanactis Zahlbruckneri Herre, n. sp.—Thallus effuse, of small, irregular 
(sometimes plicate) squamules which at first are scattered but soon become a 
thick, uniform, tartareous crust. Color a more or less evident rose-pink which 
soon fades out in herbarium specimens, leaving them whitish or ashy gray. 
Apothecia small, round, sessile, becoming convex; black, the disk gray- 
pruinose, but eventually naked; the proper margin prominent but finally excluded. 
Epithecium dark or black, thick, 45 to 50 high, blue with I; hypothecium 
black, broad, 42 to 60 high; paraphyses typical of the genus, thecium brick- 
or vinous-red with I; asci clavate, straight or curved, sometimes pointed at 
* — 106 
tip, 7 6.8 #3 Spores eight, colorless, fusiform, straight or slightly curved, 
quadrilocular, es = LM. 
Rare on maritime rocks, 50 to 75 feet above the sea, at Point Lobos, San 
Francisco. Associated with Dendrographa minor, Arthopyrenia halodytes, and 
Trentepohha sp. 
Lecanora Bolanderi Tuck.; L. pinguis Tuck.; L. phryganitis Tuck.; Ope- 
grapha saxicola Ach.; Parmelia Herrei A. Zahlbr.; P. Borreri Turn.; P. perlata 
(L.) Ach.; Pertusaria multipuncta (Turn.) Nyl.; Physcia erinacea (Ach.) Tuck.; 
Placodium coralloides Tuck.; Ramalina ceruchis (Ach.) DeNot.; R. ceruchis 
ri Tuck.; R. combeoides Nyl.; R. homalea Ach.; Rinodina radiata 
uck. ; 
The foothill region comprises all that territory between San 
Francisco Bay and the mountains proper, south of San Bruno moun- 
tain, and extends from sea-level to a height of approximately 1000 
