. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. —73-- Contingent phases: (a) Laciniae deformed and deeply pitted, thalline exciple rugose. (See Hasse, Contributions U. S. Nat. Herb. 17: io6. 1913.). (b) Laciniae stout, swollen (var. novo robusta). Type: U. S. Nat. Herb., Agiabampo, Mexico, 1890. -leg. Ed. Palmer. Similis R. comheoidi Nyl.,, thallus robustior, niger infra (altit. centim., cras- sit 3-4 millim.), minutae faveolae; apothecia terminalia (latit. 5-7 millim.). Habitat in rupibus. Also seen from Guadalupe Island. Substrata: On maritime rocks (sandstone, grani
. The Bryologist. Mosses; Liverworts; Lichens; Botany; Bryology. —73-- Contingent phases: (a) Laciniae deformed and deeply pitted, thalline exciple rugose. (See Hasse, Contributions U. S. Nat. Herb. 17: io6. 1913.). (b) Laciniae stout, swollen (var. novo robusta). Type: U. S. Nat. Herb., Agiabampo, Mexico, 1890. -leg. Ed. Palmer. Similis R. comheoidi Nyl.,, thallus robustior, niger infra (altit. centim., cras- sit 3-4 millim.), minutae faveolae; apothecia terminalia (latit. 5-7 millim.). Habitat in rupibus. Also seen from Guadalupe Island. Substrata: On maritime rocks (sandstone, granite) and, it is said, on shrubs and trees. Distribution: Common in the Transition Zone on the Pacific Coast from Marin County to San Diego, California. It has been recorded inland two miles at Pilarcitos Creek canon at an altitude of 250 feet. 3—Distribution Stations: California: Monterey; Point San Pedro; r „ t ' 'of Ramahna com- Diego; Mission. Catalina Island; San San Mateo Co. Dolores. Observations: This generally saxicolous species, distinguished by its more podetiiform growth and terminal, corymbose apothecia, was not recognized by Tuckerman. It is often difficult to separate it from ceruchis, with which it undoubtedly intergrades, and like testudinaria is of doubtful spe- cific rank. There are even phases which approach homalea and others which have been referred to hiimilis. The examples of this and the type are always less rigid and typical if growing on wood; in fact the species seem to be largely based on the results of substratal growth. ExsiccATi: No. i, Lich. Boreali-Amer., Cummings, etc. ^'San Mateo ; Cal., Feb. 17, 1893. M. A. Howe, called R. ceruchis. No. 91, Decades N. A. Lich., Cummings, etc.—data as above. No. 1369, Krypt. Exsic, Zahlbruckner, Pilarcitos Creek canon, Cal., A. C. Herre. [To be co7itimied] Explanation of Plates V-VII Plate V 1. Transverse section of the thallus of Ramalina homalea showing the coalescent hyphae of the medulla and
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