HASSE—-LICHEN FLORA OF SOUTHERN CALIFORNIA. 11 
thalline verrucee, immersed, the apex dull black, the ostiole hardly visible, the peri- 
thecium obscurely brown, dimidiate; thecium pallid, globose; paraphyses distinct, 
filiform, subclavate above; asci 80 to 100 # long, 29 to 32 » thick, the membrane thick- 
ened at apex; spores in 2’s, at first colorless, later brownish, ovoid and oblong-ovoid, 
muriform, the loculi subglobose, 8 to 10 in the long spore axis and 3 to 5 in the trans- 
verse; spores 35 to 44 # long, 14 to 21 » thick, staining yellow with iodine, the hymenial 
gelatine a coppery brown. 
Type locality in the Santa Monica Mountains near Encino, on argillaceous schist. 
Type deposited with Dr. A. Zahlbruckner; duplicates distributed to the late Prof. 
Clara Cummings, Rev. C. H. Demetrio, Dr. A. C. Herre, and Dr. B. de Lesdain, and 
in herb. Hasse. 
5. Endocarpon monicae Zahlbr. Beih. Bot. Centralbl. 13: 153. 1902. 
Thallus effuse, thin, of minute, olivaceous-cinerascent, subverruculose squamules, 
loosely aggregated, the fertile ones being slightly larger, containing one or two 
apothecia, these subimmersed, dull black, the ostiole barely visible; perithecium 
dark, dimidiate; thecium pallid, globose, 240 to 270 » in diameter; hymenial gonidia 
numerous; paraphyses gelatinous; asci saccate-clavate or clavate, 120 to 140 y long, 
24 to 28 p thick, the membrane above slightly thickened; spores in 2’s or 3’s, oval, 
oval-oblong, or oblong, muriform, pale brownish, 26 to 55 » long, 10 to 20 p thick, 8 to 
14 cells in the long spore axis, 4 or 5 in the transverse; hymenial gelatine with iodine 
a sordid greenish. 
Type locality in the Santa Monica Mountains near Encino on argillaceous schist. 
Type deposited with Dr. A. Zahlbruckner; duplicate in herb. Hasse. 
PYRENULACEAE. 
Thailvs crustaceous, uniform, ecorticate, devoid of rhizine; algal symbiont a 
Chroolepus; perithecia solitary (in our species), erect with a vertical aperture; sper- 
matia exobasidial. 
KEY TO GENERA. 
Paraphyses loosely branching and internetting or absent.... ARTHOPYRENTA (p.11). 
Paraphyses not branching, separate. 
Asci 4 to 8-spored, the spores 2 to several-locular........ Portna (p. 12). 
Asci many-spored, the spores 2 and 4-locular............ THELopSIS (p. 12). 
ARTHOPYRENIA Mass. 
Paraphyses loosely branching and internetting or absent; spores 2 to 6-locular, 
colorless, ovoid or oblong. 
KEY TO SPECIES, 
Apothecia minute..................24. ween e eee eee peeeeee 1. A. parvuca, 
Apothecia medium-large.................2 2222 cece eee eee eee eee 2. A. biformis. 
1. Arthopyrenia parvula Zahlbr. Beih. Bot. Centralbl. 13: 149. 1902. 
Thallus epiphleodal, thin, pale grayish, smooth, generally forming small patches; 
KHO—, Ca(ClO),.—; apothecia minute, separate, rarely grouped, globose, black, the 
base slightly covered by the thallus, monocarpous, the apex becoming later depressed 
and punctiform-perforated; perithecium entire, dark, internally pallid, staining 
yellow with iodine; paraphyses filiform, about 1.5 thick, 80 to 90 # long, 9 to 11 p 
thick; spores in 8’s, disposed in one row, colorless, ovoid, bilocular, the loculi unequal, 
14 to 16 » long, 5 to 6 » thick. 
On Umbellularia californica in Malibu Canyon (the type locality) in the Santa 
Monica Mountains. 
60653°—13 2 
