HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 109 
5. Usnea articulata (L.) Hoffm. 
Pendulous, light yellowish grayish green; primary divisions terete, smooth, the con- 
tinuity of the cortex interrupted by annular fissures; sterile. 
On Abies, “Grass Valley,’’ San Bernardino Mountains, Parish. Apparently rare. 
ALECTORIA Ach. 
Thallus filamentous, pendulous, rarely ascending, elongated, smooth, corticate 
throughout; apothecia lateral, pedicellate, rare with us. 
KEY TO SPECIES. 
Erect; apothecia with fibrils. .... 2.2.2... eee ee eee eee eee eens 2. A. oregana. 
Perdulous, smooth. 
Terete, dark brown... ........-...e eee eee cee eee cence eee 1. A. jubata. 
Compressed-terete, straw color. ....-.-...-----.--+------e-e- 3. A. ochroleuca. 
1. Alectoria jubata (L.) Ach. 
Thallus long-pendulous, dark brown throughout, terete, smooth and glistening, 
lacunose below, much branched and the capillary terminations intertangled, KHO—; 
apothecia rare, sessile, lateral; disk concolorous with the thallus, convex and the 
thalline margin becoming obsolete; epithecium continuous, brown; thecium 36 to 
40 » high, pale reddish brown or the lower half colorless; paraphyses coherent; hypo- 
thecium colorless; asci clavate; spores 8, ovoid-ellipsoid, 6 to 8.5 » long, 4 to4.5 » thick; 
all apothecial structures with iodine blue, KHO—. 
On branches of conifers, San Quentin, Lower California, Greene. Upon the same 
substratum in the San Jacinto and San Bernardino Mountains, but generally sterile. 
2. Alectoria oregana Tuck. 
Thinly tufted, brown and dark brown, erect, subcompressed, lightly furrowed, 
sparingly branched or short, brown-fibrillose, the terminations terete, 1.5 to 3 cm. in 
height, KHO—; apothecia lateral and subterminal; disk dark brown, concave to 
plane, glistening; thalline margin with brown, short, spreading or deflexed fibrils; 
epithecium continuous, light brown; thecium colorless, 48 to 52 » high; paraphyses 
coherent; hypothecium colorless; asci clavate, the tops thickened; spores 8, sub- 
globular, 5 to 6 yw long, 3.5 to 4 w thick; all hymenial structures staining blue with 
iodine, KHO—; the cortical membrane with longitudinal, sparingly branching 
hyphz, those of the medulla freely branching, forming a loosely intertangled net- 
work. 
On bark of conifers and dead wood. Along the west coast from Washington, Foster, 
to Cape San Quentin, Lower California, Greene. Not rare in the Tehachapi Range; 
at Strawberry Valley, San Jacinto Mountains; in the San Bernardino and San Gabriel 
Ranges. 
3. Alectoria ochroleuca (Ehrh.) Nyl. 
Pale straw color, compressed-terete, branched, the branches somewhat tortuous 
and interwoven, loosely beset with rather short lateral fibrils; specimen seen sterile, 
esorediate. 
Determined by Doctor Stizenberger. 
San Bernardino Mountains, Parish. 
EVERNIA Ach. 
Thallus fruticulose, erect or subpendulous, branching, variously lobed; apothecia 
lateral or subterminal; sterigma jointed, sparingly branched; spermatia acicular, 
straight. 
