—go— 
101. Philonotis fontana (L.) Brid. , “a lax form,” Card. Rock Creek. 
102. Physcomit’rium turbinatum (Rich.) C. M. Agricultural grounds. 
103. Plagiothecium denticulatum (L.) B. & S. Alexandria, Virginia. 
104. Plagiothecium Roeseanum (Hpe.) B. & S. (P lagiothecium Sulli- 
vantiae B. & S.) Rock Creek: Banks of the Potomac; Fourteenth 
Street extended. 
105. Plagiothecium repens (Brid.) B. & S. Rock Creek. 
106. Pleuridium alternifolium (Dicks., Kaulf.) Brid. Agricultural Depart- 
ment grounds; Arlington Road. 
107. Pleuridium subulatum (Huds.) Rabenh. Rock Creek; Tenallytown. 
108. Pogonatum breyicaule (Brid.) P. B. East Washington Electric Rail- 
way Line. 
109. Polytrichum commune L. Rock Creek. 
no. Polytrichum Ohioense R. & C. Rock Creek; Spencerville, Maryland, 
in. “ Pottia truncata ” — a doubtful reference. Rock Creek Park. 
112. Ptycfiomitrium incurvum (Schwaegr.) Sulliv. Rock Creek. 
1 13. Pylaisia intricata (Hedw.) Card, (non Sch ) in Bull. Herb. Boiss. Vol. 
7, No. 4, 1899, p. 373. ( Pylaisia velutina Sch.). Spencerville, 
Maryland. 
1 14. Pylaisia Schimperi Card, in loc. cit. ( Pylaisia intricata Sch.). Rock 
Creek: Arlington: Fourteenth Street extended. 
115. Pylaisia subdenticulata B. & S. Rock Creek: Spencerville, Mary- 
land. 
1 16. Rhynchostegium deplanatum Sch. Banks of the Potomac. 
1 17. Rhynchostegium geophilum Aust. Rock Creek. 
1 18. Rhynchostegium rusciforme (Weiss) B. & S. Broad Branch of Rock 
Creek. 
1 19. Rhynchostegium serrulatum (Hedw.) Jaeg. Rock Creek; Bay Ridge, 
River View; Banks of the Potomac: Soldiers’ Home grounds; Sligo: 
Agricultural Department grounds. 
120. Sch is t i d 1 u m apocarpum (L.) B. & S. District of Columbia (collected 
Coville). 
121. Sematophyllum adnatum (Mx.) E. G. Britton in The Bryologist, July, 
1902, p. 65 ( Rhaphidostegium microcarpon). Bay Ridge. 
122. Sematophyllum Carolinianum (C. M.) E. G. B., in loc. cit. ( Raphi - 
dostegium demissnm Carolinianum ). Rock Creek. 
123. Sematophyllum Marylandicum (C. M.) E. G. B. , in loc. cit. ( Raphi - 
dostegium demissum Marylandicuni). Rock Creek; Virginia side 
of the Potomac. 
124. Sphagnum cymbifolium laeve Warnst. ( Sphagnum cymbifolium forma 
glaucescens). Rock Creek Park . 
125. Systegium crispum (Hedw.) Sch. ( Astomum crispum ). Soldiers’ Home 
grounds. 
126. Systegium Sullivantii (B. & S.) Jaeg. ( Astomum Sullivantii). Agri- 
cultural Department grounds. 
127. Thelia asprella Sulliv. Rock Creek; River View: Spencerville, 
Maryland. 
