HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 75 
Two forms are recognized: Forma platynwm of authors, with irregular and larger 
lobes (up to 4 cm. long), finely wrinkled and tuberculate, the color, in the herbarium, 
quite leaden gray, the spores 40 by 16 »—on earth above Saratoga, California, Herre; 
and forma lophatum of authors, the lobes finely and deeply dissected, the thallus 
dark chestnut brown and glistening, the tips of the laciniz granular-thickened— 
forming dense cushions among moss, Mount Wilson of the San Gabriel Range, at 1,650 
meters; Yosemite Valley at a like elevation. 
4, Lepotogium lacerum (Retz) 8. F. Gray. 
Thallus foliaceous, brown, becoming grayish brown in the herbarium, the lobes 
densely intricate, deeply and narrowly lacero-laciniate, forming cushions; apothecia 
elevated-sessile, about 0.75 mm. in diameter; disk concave, with the entire, smooth 
margin light reddish; epithecium subgranulose, yellowish greenish brown; thecium 
about 140 # high, colorless; paraphyses strict, slender, loosely coherent; hypothecium 
almost colorless; asci cylindric, about equaling the thecium in height; spores oblong- 
ellipsoid, one end long-attenuate, muriform, 28 to 44 4 long, 10 to 16 » thick; hymenial 
gelatine with iodine deep blue, the spores yellow. 
On the ground running over moss; Mill Creek Canyon, San Bernardino Range at 
1,700 meters, Throughout North America; South America (Chile); Europe. 
5. Leptogium tenuissimum (J. E. Smith) Koerb. 
Thallus minute, brown, of laciniate, small, foliaceous squamules; apothecia sessile, 
from 0.2 to 0.75 mm. in diameter; disk at first immersed, urceolate, with a turgid 
margin, to finally flat, dull reddish, the margin thinner and lighter colored than the 
disk; spores oblong-ellipsoid, 5-locular with several of the loculi subdivided in the 
longitudinal axis, 32 to 36 w long, 12 to 16 » thick. 
On sandstone, Santa Monica Range; Santa Cruz Mountains at 1,700 meters altitude, 
Herre. 
6. Leptogium palmatum (Huds.) Mont. 
Thallus dark brown, becoming grayish brown, palmate-lobate, the lobes irregularly 
lacerate and convolute, appearing corniculate; apothecia small, 0.25 to 0.33 mm. in 
diameter, appressed; disk concave, brick red, the entire margin paler; epithecium 
continuous, pale brownish yellow; thecium 180 » high, colorless; paraphyses not 
thickened above, distinct; hypothecium colorless; asci clavate, about 1504 high, 
spores broadly ellipsoid and ovoid-ellipsoid, 4-locular and submuriform, 18 to 36 # 
long, 12 to 20 » thick. 
On earth among moss; Santa Cruz Peninsula, Herre; at Santa Barbara; Santa 
Monica Range. Pacific Coast States. Europe. 
7. Leptogium rhyparodes Nyl. 
Thallus thin, coarsely and unequally granulate-crustaceous, brown to darkening; 
apothecia small, at first concave, the disk dull brick red, the elevated, entire margin 
of lighter color, later flat and biatorine; epithecium pallid, granulose; thecium about 
140 » high, colorless; paraphyses slender, loosely adglutinated; hypothecium pale 
yellowish; asci inflated-clavate; spores ellipsoid and fusiform-ellipsoid, 28 to 32 p 
long, 12 to 14 » thick, 6 or 7-locular and submuriform; hymenial gelatine with iodine 
faint blue, the asci darker, especially at the apices. 
On sandstone and earth among moss, in the Santa Monica Range. 
HEPPIACEAE. 
Thallus squamulous-crustaceous, of dark brownish olive green color, closely attached 
to the substratum by rhizinz; squamules generally monophyllous, (thallus approaching 
a fruticulose form with us only in Heppia zahlbruckneri,) the loosely pseudoparenchy- 
matous structure inclosing Scytonema gonidia—moderately large, pale bluish green 
60653°—13——6 
