. The Bryologist. Bryology; Bryology -- Periodicals. Fig. 2. P. tiliacea. Parmelia tiliacea (Hoffm.) Floerk. (Fig. 2.) This pretty lichen grows on rocks, trees, and dead wood; it adheres closely to the substratum. The lobes are narrow and round, quite smooth. Glaucescent in color usually, but sometimes a light gray. Beneath it is black and densely covered with black fibrils. Apothecia are fre- quent, medium in size. The disk is dark brown with a reddish tinge, the margin is crenulate. Parmelia Borkeri Turn. While this is not an uncommon species it is not so generally found as the variety rtaie
. The Bryologist. Bryology; Bryology -- Periodicals. Fig. 2. P. tiliacea. Parmelia tiliacea (Hoffm.) Floerk. (Fig. 2.) This pretty lichen grows on rocks, trees, and dead wood; it adheres closely to the substratum. The lobes are narrow and round, quite smooth. Glaucescent in color usually, but sometimes a light gray. Beneath it is black and densely covered with black fibrils. Apothecia are fre- quent, medium in size. The disk is dark brown with a reddish tinge, the margin is crenulate. Parmelia Borkeri Turn. While this is not an uncommon species it is not so generally found as the variety rtaiecta. The thallus is very rough and is often covered with white soredia which give it a speckled appearance. It clings quite closely to the trees or dead wood on which it is found. Is greenish brown in color, beneath is lighter, at the margins are white hair- like fibrils. The apothecia are large with entire margins, the disk dark chestnut. Parmelia Borreri Turn, var. rudecta, Tuckm. (Plate VI. i.)—In general appearance the variety is much like P. Borreri, only it is thickly covered with isidioid granules, the lobes are more divided and the margins are often broken, showing the woolly medullary layer. It does not cling so closely to the substratum. Underneath the thallus is light brown, and is covered thickly with short, dark fibrils. Apothecia are not frequent. Is found on trees, dead wood and Fig. Parmelia saxatilis (L.) Fr. (Fig. 3.) Thallus with many cleft, narrow, blunt lobes, more or less reticu- lated and lacunose, margins wavy with white soredia. The color is greenish or ashy gray, sometimes turn- ing to reddish brown. Be- neath it is black and well covered with black fibrils. The apothecia are medium in size with rather an irreg. ular margin, the disk is chestnut. Parmelia (L.) Fr. var. sllcata, Nyl. This variety is dis- tinguished from P. saxatilis by the presence of conspicuous rounded or oblong soredia, which become confluent, giving t
Size: 1886px × 1325px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcollectionbiodiversity, bookcollectionnybotanicalgarden
