—gi — 
128. Thelia hirtella (Hedw.) Sulliv. Arlington. 
129. Thuidium delicatulum (L. ) Mitt. Banks of the Potomac. 
130. Thuidium microphyllum (Sw.) Best in Bull. Torr. Bot. Club, March 
1896, p. 88. {Thuidium gracile). Agricultural Department grounds; 
Rock Creek; Ingleside; Mt. Pleasant: Spencerville, Maryland. 
131. Thuidium RECOGNiTUM (Hedw.) Lindb. Rock Creek; Cabin John’s. 
132. Thuidium scitum (P. B.) Aust. Glen Echo; Rock Creek. 
133. Thuidium Virginianum (Brid.) Lindb. {Thuidium gracile La 7 icastri- 
ense). See The Bryologist, Oct., 1901, p. 73, and Bull. Torr. Bot. 
Club, March, 1896. Rock Creek. 
134. Tortula muralis (L.) Hedw. Georgetown; grounds around Washing- 
ton’s Church, Alexandria, Virginia. 
135. Ulota crispula Bruch, in Brid, Bryol. Univ. Spencerville, Maryland. 
136. Ulota Americana (P. B.) Mitt. {Ulota Hutchinsiae ). North Washing- 
ton, D. C. ; Spencerville, Maryland. 
137. Webera Lescuriana L. & J. Rock Creek. 
138. Webera nutans (Schreb.) Hedw. Rock Creek: Glen Echo: Arlington. 
139. Weisia viridula (L.) Hedw. Arlington: Glen Echo: Fourteenth Street 
extended ; Agricultural Department grounds. 
*Dr. George B. Sudworth, to whom I referred this nomenclature problem 
for verification, disposed of it as follows: “If Homalothecium is untena- 
ble, then Cardot’s so-called sections, Euhomalothecium and Homalotheciella, 
are valid ; and in casting Homalothecium sp. into synonymy, the section name 
Euhomalothecium must stand first , and Homalotheciella second , should the 
former ever have to be replaced on account of any invalidity shown to exist. 
This is so, because a section name is. in fact, a sub-generic name, and like a 
sub-specific name, is raised to specific rank, and may at any time of neces- 
sity (and if Homalothecium be untenable, this is a case of necessity) be 
raised to generic rank. This cuts ouf^ a section name, but if the latter is 
really wanted a new one may be created. Grout’s position in passing over 
these two section names of Cardot’s is unsupported by any authority I know. 
His Burnettia must certainly fall before either of Cardot’s section names.” 
Alphabetical LisT of Species of Hepaticae. 
The following species of Hepatics were collected by me in and near the 
District of Columbia and were determined by Dr. Alexander W. Evans. 
1. Archilejeunia clypeata (Schwein.) Schiffn. District of Columbia. 
2. Bazzania triLobata (L.) S. F. Gray. Rock Creek. 
3. Cephalozia curvifolia (Dicks) Dumort. Spencerville, Maryland. 
4. Frullania eboracensis Gottsche. Banks of the Potomac opposite 
Georgetown: Rock Creek; Spencerville, Maryland. 
5. Frullania Asagrayana Mont. Blagden’s Run. 
6. Frullania squarrosa (R. B 1 & Nees) Dumort. Rock Creek. 
7. Jungermannia pumila With. Banks of the Potomac opposite George- 
town. 
8 . Kantia sp. Rock Creek. 
