106 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
1. Ramalina ceruchis (Ach.) De Not. 
Thallus tufted, pale straw color, terete becoming often somewhat angular from 
shallow lacune, frequently with small black dots, attenuate upward, often with few 
short branches above, KHO+ pale yellow, Ca(ClO)—; apothecia lateral and subtermi- 
nal, 1 to2 mm. wide; disk concave, delicately whitish pruinose, the thalline margin 
entire or slightly crenulate; spores 8, oblong, straight or lightly curved, 13 to 20 p long, 
4 to 5 # thick, bilocular. 
Not rare along the coast on shrubs; San Clemente Island, Trask. 
In the forma cephalota Tuck. the sterile thallus is besprinkled with cephaloid, 
isidiose spots and excrescences. It is found with the species. San Clemente Island, 
Trask. 
2. Ramalina combeoides Nyl. 
Thallus tufted, sordid light yellowish, subterete, appearing angular from the numer- 
ous lacune, no reaction of the cortex or medulla with KHO or Ca(C1O),, 1 to 2 cm. 
in height; apothecia terminal and subterminal, usually several clustered at or below 
the apex, 2 to 7 mm. wide; disk concave to flattish, pale ochroleucous, the thalline 
margin entire or crenately cut; spores straight or very lightly curved, 12 to 20 » long, 
3.5 to 5 p# thick. 
On rocks and shrubs near the coast and on the coast islands; San Clemente Island, 
Trask; on shrubs near San Diego and Newport. 
A form occurs near Clifton-by-the-Sea, Los Angeles County, on dead Sambucus and 
Isomeris arborea, having the thallus and the thalline margin of the apothecia thickly 
studded with globular, ochroleucous bodies, their cortical membrane, 28 to 32 p thick, 
composed of compact vertical hyphae, passing below into a coarse-celled tissue; the 
cortex containing small gonidia (yellow with KHO), 6 to 12 » in diameter, shriveled 
and distorted; the apothecia, clustered at the apices of the erect thallus tufts, con- 
taining oblong spores, mostly straight, 8 to 14 » long, 3.5 to 4 » thick; all apothecial 
structures staining blue with iodine. 
3. Ramalina homalea Ach. 
Thallus tufted, strongly compressed, 2-edged, sordid light yellowish gray (becoming 
reddish brown in the herbarium), the surface shallow-lacunose and reticulate-ridged, 
3 to 8 cm. high, the sterile fronds gradually attenuating upward, the fertile mostly 
shorter and wider (0.5 to 2.5 mm. wide), no reaction of thallus or medulla with KHO 
or Ca(ClO); apothecia marginal and terminal, 2 to 8 mm. wide; disk pale buff, 
velvety, concave to flat, finally everted and distorted; thalline margin persistent, 
stout, entire to slightly sinuate; spores straight; 14 to 18 » long, 4 to 5 # thick. 
Near the coast; Santa Barbara and San Clemente Islands, Trask; San Guadalupe 
Island, Franceschi; Santa Catalina Island 
4. Ramalina canaliculata Fries. 
Lacinis of the tufted thallus narrow, linear, canaliculate, 3 to 6 cm. high, without 
soredia, sparingly branching, ascending to erect, glaucous, pale green; apothecia sub- 
terminal below the deflected points of the lacinie, small to medium large; disk ccn- 
cave, round, often saddle-shaped, lightly pruinose, the thalline margin persistent, 
mostly entire; spores bilocular, 12 to 16 4 long, 4 to 7 » thick. 
On shrubs and branches of trees throughout the Santa Monica Range; Lower Cali- 
fornia, Brandegee. 
5. Ramalina fraxinea (L.) Ach. 
Thallus tufted, the laciniw broader and longer than in R. calicaris, flat, simple or 
sparingly divided, not finely attenuate above; upper surface deeply lacunose, now 
and then fenestrate, or at last loosely fringed with linear, laciniate lobules; apothecia 
hitherto not found. 
Santa Catalina and Santa Barbara islands, Trask. 
