HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 13 
1. Hassea bacillosa (Nyl.) Zahlbr. Beih. Bot. Centralbl. 13: 150. 1902. 
Verrucaria bacillosa Nyl.; Hasse, Lich. South. Calif. 19. 1898. 
Thallus crustaceous, effuse, leprose-furfuraceous, subareolate-rimose, obscurely 
olivaceous brown, quite thin, no reaction with KHO or Ca(ClO),, ecorticate; (according 
to the author of thisnew genus,) gonidia of the Nostoc type, embedded in a gelat- 
inous mass and subconcatenate (3 or 4 cells connected); apothecia sessile, dispersed, 
0.2 to 0.3 mm. wide, conical-semiglobose, black, somewhat glistening; perithecium 
erect, dimidiate, fuliginous, the ostiole punctiform, inconspicuous, at last lightly 
impressed; nucleus pallid, not changed by iodine; paraphyses lax, sparsely branched 
and connected; asci scarce, oblong-cuneate, straight or moderately curved, 43 to 48 pt 
long, 8 to 10 « wide, the membrane not thickened; spores in 8’s, arranged vertically, 
hyaline, simple, bacillose, straight or nearly so, their apices rounded and slightly 
broadened, 30 to 40 » long, 1.8 to 2.1 » thick; spermatia not known. 
On crumbling sandstone. Type locality, foothills of the Santa Monica Range near 
the Soldiers’ Home. 
Type deposited with Dr. W. Nylander; duplicates with Dr. A. Zahlbruckner and 
in herb. Hasse. 
MYCOPORACEAE. 
Thallus crustaceous, uniform, with Palmella or Chroolepus gonidia; hymenium 
composite, divided by partitions, with apical apertures. 
Based upon the characters of the spores two genera have been formed: Mycoporum, 
with Palmella gonidia and muriform spores and Mycoporellum, with Chroolepus 
gonidia and bilocular spores. ‘Two species of the latter genus concern us as sole repre- 
sentatives in southern California. 
MYCOPORELLUM Muell. Arg. 
Gonidia Chroolepus; spores bilocular. 
KEY TO SPECIES. 
Thallus absent; apothecia parasitic on other lichens...... 1. M. epistiqgmellum. 
Thallus present, whitish, diffuse......................... 2. M. hassei. 
1. Mycoporellum epistigmellum sp. nov. 
Mycoporum epistigmellum Nyl. in litt. 
Thallus absent; apothecia parasitic upon disks of Blastenia festiva and on the thallus 
of Acarospora obpallens and A. chlorophana; paraphyses absent; asci oblong-ellipsoid 
and obfique-ellipsoid, acuminate at the tops, the membrane there thickening, straight 
or slightly curved, 48 to 56 » long, 14 to 15 » thick; spores in 8’s, bilocular, colorless, 
oblong-ellipsoid, 16 to 20 » long, 3.5 to 4 » thick, the lower loculus narrower and more 
acuminate than the other; asci stained yellow by iodine. 
Type locality, foothills of Santa Monica Range near the Soldiers’ Home. 
Type deposited with Dr. W. Nylander; duplicate in herb. Hasse. 
2. Mycoporellum hassei Zahlbr. sp. nov. in litt. 
Thallus whitish colored, diffuse, thinly squamulose; apothecia scattered, 0.4 to 1 
mm. wide, dull black, flattish, under the hand lens seen finely papillate; paraphyses 
absent; asci oblong-ellipsoid, 60 to 80 » long, 20 to 28 » thick, the membrane about 3 z 
thick, the upper attenuate part solidly thickened; spores in 8’s, colorless, bilocular, 
oblong, 20 to 28 » long, 8 to 10 » thick, the lower loculus slightly thinner and longer 
than the upper; hymenial gelatine staining pale yellow with iodine, the ascus contents 
pale vinous red; no change with KHO. 
