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MUSCI APPALACHIAN!. 
156. Orthotrichum Ludwigii. 
Schwcegr. — Bryol. Europ. III. t. 225. 
Hab. On- trees and stone fences, not common. 
157. Orthotrichum Hutchinsiae. 
Hook. ^ Tayl. — Bryol Europ. III. t. 226. 
Hab. On dry rocks, frequent ; also occasionally on the roots of trees. 
158. Orthotrichum crispum. 
Hedw.— Bryol. Europ. III. t. 228. 
Hab. On trees and bushes, common. 
159. Orthotrichum crispulum. ' 
Hornsch. — Bryol. Europ. III. t. 228. 
Hab. On trees, particularly Betida lutea, rather scarce. 
160. Orthotrichum anomalum. 
Hedw. — Bryol. Europ. III. t. 210. 
Hab. On rocks, along rivers, Little Falls, &c., New York ; also 
Canada, Macoun. 
161. Orthotrichum Porteri. 
Sulliv. Lesqx. Mss. — Habitu et statura inter 0. 
Peckii atque O. anomalum medium ten ens, a primo 
capsula subexserta oblongo-elliptica, etc., ab altero 
capsula multo minore octo-striata, pedicello breviore, 
calyptra pilosiore, etc. satis distinctum. — Sulliv. 
Icon. Muse. Suppl. 1, ined. 
Hab. On rocks about Lancaster, Pennsylvania, Prof. T. C. Porter. 
