Type locality: “Nord-west Kiiste von Amerika,” not according to Krem- 
pelhuber “Insel das Austral-Oceans.” 
Original description: “ cartilagineus, pallidus, pendulis, glaber, com- 
pressus, ramis dichotomia divisis interse reticulatim connexis, apicibus dicho- 
tomis intersecto subtili et eleganti reticulo, scutellis carneis, marginalibus, sub- 
pedunculatis, connexo-planis.” 1 . c. 
Figure: Agardh., 1 . c., Pl. j. Schneider, Guide Stud. Lich. Pl. 5. 1904. 
Cramer, Bull. Soc. Bot. Suisse 1: Pl. 1-3. 1891. 
Diagnosis: Phallus pendulous , compressed, reticulate; apothecia mostly 
marginal; spores straight or substraight. 
Description: Thallus pendulous (max. length 2 m.), subrigid, cinereus to 
virescent; cortex longitudinally striate, subrugose; laciniae compressed, linear 
or expanded (max. width 40 mm.) subcanaliculate and tortulous, at length 
foraminous and reticulate, apices attenuate. Apothecia not uncommon, mar- 
ginal or lateral, concave at length convex (max. diam. 3 mm.), disk buff to .car- 
neous. Spores ellipsoid, straight or substraight, ~-^ 7 20 
Contingent phases: (a) Blackening. ( b ) Branches subterete, including 
filaments of netted areas. 
Substrata: On trees and old wood. 
Distribution: Abundant from the lower Austral to the 
lower Boreal Zone from Lower California to British Columbia 
from sea-level to 2oco feet. 
Stations: California: Santa Monica Range; Mayfield; 
San Diego; Santa Barbara; Ross Valley, Marin Co.; Mt. Santa 
Ana; Pacific Grove; Stanford University; Mt. View Landing; 
Pigeon Pt.; Alpine Creek; Ano Nuevo Creek; Frenchman’s 
Tower; Searsville; Santa Cruz Island; Nordhoff; Los Canoas 
Canon; Santa Clara Co., Berkeley; Mendocino Co.; Ukiah; 
San Roque Trail; Mission Dolores; Sanealito; San Luis Obispo; 
St. Helena; San Andreas; San Miguel; Sonoma Co.; Avalon; 
Nepa Valley; Lancelito. Oregon: Sanvier’s Island; Dallas; 
Brockway. Washington: Rock Harbor; Westport; San Juan 
Co.; San Juan Island; Friday Harbor; Wasp Island; Seattle; Pt. 
Orchard. British Columbia: Victoria; New Westminster; Port 
Renfrew; Beacon Hill Park; Vancouver Island. Lower Cali- 
fornia: Ensenada. Mexico: Manzanillo; Monterey. 
Observations: This remarkably beautiful and usually 
easily distinguished species possesses an interesting history. 
The eminent algologist Agardh as late as the year 1870 curiously mistook it 
for an alga, though it had been described as a lichen seventy years earlier. 
Through the kindness of Mr. A. Gepp, of the British Museum, I am enabled 
here to give the complete synonymy. Two most remarkable, terete and yet 
netted specimens, one collected at Port Renfrew, Vancouver Island, by Dr. 
A. Schneider, the other from Avalon, Catalina Is. (U. S. Nat. Herbarium), 
have come before me. If these two specimens are not unique and prove to 
Fig. 5 — Distribu- 
tion of R. reticu- 
lata. 
