44 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
(some of them); hypothecium pale; asci inflated-clavate, 48 » long, 12 , thick; 
spores ovoid-ellipsoid, 10 # long, 3 to 5 # thick. 
Frequent on bark of Pseudotsuga macrocarpa in the San Gabriel Range from middle 
to higher elevations, but rare in fruit. Northern United States and Canada; northern 
Europe. 
27. Lecidea vernalis (L.) Ach. 
Crust pale ash color, continuous (smooth and pale yellowish gray on bark of Umbellu- 
_laria californica), and often granular; apothecia sessile, small, 0.25 to 0.3 mm. in 
diameter, dispersed or often crowded and contiguous; disk flat, dull rusty brown, 
the margin somewhat lighter in color, finally becoming dark reddish brown, slightly 
convex and the margin disappearing; epithecium colorless or pale smoky; thecium 
76 to 80 # high; paraphyses adglutinated; hypothecium pallid, of similar hue to the 
epithecium; asci clavate; spores in 8’s, ellipsoid, 8 to 16 long, 3 to 4 # thick, not 
rarely appearing falsely bilocular; hymenial gelatine with iodine blue, turning a 
sordid greenish blue. 
On various barks (Juglans californica Salix lasiolepis, Ceanothus divaricatus), in 
canyons of the Santa Monica Mountains and on decorticated pine in the San Gabriel 
Range at 1,700 meters altitude; on decorticated oak in the Tehachapi Range near 
‘“‘Lone Pine Mine.’’ The forma minor Nyl. occurs on Umbellularia californica in the 
Santa Monica Mountains. Eastern and northern part of the United States; northern 
Europe. 
28. Lecidea flexuosa (Fries) Nyl. 
Crust of pale greenish gray, minute, flattish-convex squamules, many with a sore- 
diose appearance, for the most part closely congregated, KHO—, Ca(C1O),-+red; apo- 
thecia sessile, the disk persistent, flat, black, slightly roughened, the permanent margin 
thin, black, more or less flexuose; epithecium pale; thecium nearly colorless to sordid 
pale brown; paraphyses adglutinated, indistinct; hypothecium pale; asci clavate; 
spores obovoid-ellipsoid, 8 to 10 4 long, 3 to 5 4 thick; hymenial gelatine with iodine 
yellowish. 
On charred manzanita wood, Santa Monica Mountains; Tehachapi Mountains on 
dead wood; bark of conifers in the San Bernardino Mountains. Eastern and southern 
United States; Europe. 
29. Lecidea phaeophora Stizenb.; Hasse, Bull. Torrey Club 24: 448. 1897. 
Crust pulverulent, indeterminate, nearly obsolete, KHO-+orange, Ca(ClO),— 
apothecia crowded, sessile, the disk reddish brown (when moistened light flesh- col- 
ored), planoconvex, the margin indistinct, with a pulverulent, spurious thalline 
margin; epithecium pale, continuous; thecium colorless, 52 p high; paraphyses lax, 
coherent, the scarcely thickened apices of similar color to the epithecium; hypothe- 
cium colorless; asci clavate and inflated-clavate, about equaling the thecium in 
height; spores in 8's, oblong-ellipsoid, simple, colorless, 8 to 12 » long, 4 to 7 thick; 
spermogones not seen; hymenial gelatine with iodine a handsome blue, including 
the epithecium and hypothecium, with KHO the epithecium a pale violet. 
On calcareous rock near Avalon, Santa Catalina Island, the type locality. 
Type deposited with Doctor Stizenberger in 1896, the fate of the specimen unknown 
to the writer; duplicate in herb. Hasse. 
30. Lecidea myriocarpoides Nyl. 
Crust dull brown, granulate-squamulose, or deficient; apothecia sessile, small 0.2 
to 0.5 mm. in diameter; disk flat or slightly convex, undulate and blackening; margin 
permanent, thin, of a slightly lighter shade than the disk; epithecium dark brown; 
thecium dirty white, about 48 » high; paraphyses adglutinated; hypothecium pale 
brown; asci clavate; spores broadly ellipsoid, 8 to 9 » long, 4 to 5 « thick; hymenial 
gelatine with iodine blue, soon becoming brown, 
