— IOO— 
Explanation of Plate XI. 
Fig. i. Hypnum orthocladon P. B. a, Four leaves X 30, from a specimen 
in the herbarium of Schwaegrichen from North America and communi- 
cated by Palisot. b, Two leaves X 30 from a specimen in the herbarium 
of Schwaegrichen; collected by Muhlenberg in North America, 
c, Two leaves X 30 from a specimen in the herbarium of Schwaegrichen ; 
collected in Cuba by Poppig. d, Lower portion of a leaf X 135. 
Fig. 2. Leskea varia Hedw. from Pennsylvania (Muhlenberg), a, A leaf 
X 30. b, Lower part of the same X 135. (From an “original” specimen.) 
Fig. 4. Hypnum fluviatile Sw. a, Two leaves X 30. b, Lower portion of 
one of these leaves X 135. (From an “original” specimen communi- 
cated to Hedwig by Schwartz and preserved in the herbarium of the 
former.) 
Fig. 8. Hypnum radicale P. B. from North America (Palisot and Richard), 
a. Three leaves X 30. b, Lower portion of one of these leaves X 135. 
c, Cells from the middle portion of the same X 135. (From specimens 
in the herbarium of Schwaegrichen.) 
Fig. 9. Hypnum Bergenense Austin, from Closter, New Jersey. (Austin 
“original” specimen.) a, Two leaves X 30. b, Middle portion of one 
of these leaves X 135. 
Fig. 10. Amblystegium hy grophil l um Sch. from Germany, a, Two leaves 
X 30. b, Middle portion of one of these leaves X 135. 
These figures and their descriptions are taken from M. Cardot’s valuable 
“Revision of the Types of Hedwig and Schwaegrichen ” published in the 
“ Bulletin de Vherbier Boissier in 1899. The specimens marked as 
“ original ” were evidently communicated or furnished by the authors and 
though not types in every case certainly should be regarded as authentic. 
It should be remembered, however, that in those early days of inferior 
microscopes material was often mixed and the authors of species themselves 
had mixtures in their types. M. Cardot’s figures have been presented as 
being as near authenticity as anything available. The figure H ’. Bergenense 
fails to show the characteristic concavity of the base as shown in Austin's 
Musci Appalachiani No. 391. 
Cheney has studied Palisot’s types, and has come to somewhat different 
conclusions concerning several matters as noted under different species, but 
I personally sent specimens which I consider typical A. orthocladon to 
Cheney and he called them A. irriguum in most cases, although he states 
positively that Palisot’s type is A. fluviatile. I hazard a guess that the 
specimen Cheney commented on is a form of A. orthocladon approaching 
forma brevifolia of fluviatile. 
New Dorp, New Vork. 
