— 70 - 
lower basal ones .012 x .027 mm.; apex serrate with irregular teeth; cells 
slightly papillose. Dioicous: antheridia in a terminal bud with small, blunt 
leaves. Archegonia few 1-10, paraphyses gemmiferous, branching into 
clusters of septate filaments bearing irregular multicellular gemmae, which 
produce protonema and serve as an asexual method of progagation ! Seta 
5-7 mm. long; capsule erect, 1 mm. long; lid conic; annulus large, double; 
spores not seen. 
Rare in fruit, having been found but once by C. F. Austin “ on rocks in 
a rivulet, Sussex County, N. J. September, 1867.” 
Illustration: Sullivant leones Supplement, plate 21. 1874. 
Habitat: “ On moist rocks along streams” and shores of lakes. 
Distribution: From Owen Sound, Ontario, to Pennsylvania and Ohio. 
Type locality: “Palisades of Northern New Jersey and Southern New 
York,” probably at Closter, N. J. 
Also found by Austin at Hohokus, Pascack, and Little Falls, N. J.; Jor- 
dansville, Watkins Glen, Niagara Falls (Wolle), Chilson Lake (Mrs. Harris), 
Bashbish Falls (R. S. Williams), N. Y. ; Springfield, Ohio (Miss Biddlecome), 
Bethlehem, (Rau & Wolle), Pocono Mt., Penn. (Porter), and at Owen Sound, 
Ontario (Macoun). Also in Europe on the shores of the Lake at Zurich, 
Switzerland, and at Schaffhausen on the Rhine. 
The gemmiferous paraphyses which fill the perichaetial heads almost to 
the exclusion of the archegonia are characteristic of this species. The 
accompanying plate shows the diversity of form and size which occur in these 
gemmae. No mention of them has been made in the description of Pottia 
riparia , but in Trichostomum Warnstorfii they have been described and 
figured by Limpricht, Laubmoose 388. Figs. 170-171, and by Correns, Unt. 
Verm. Laub. 99. Figs. 38-40. 
Through the kindness 
of Dr. Warnstorf I have 
received a specimen of 
Trichostomum W ar li- 
st orfii Limpr. (Fig. 171,) 
collected by F. Weber 
“on walls wet by spray 
along the shores of Lake 
Zurich , Switzerland. ” 
This is one of the cotypes 
figured by Limpricht in 
the Laubmoose. It has 
only been found sterile! 
There appears to be 
considerable variation in 
the shape and serration 
Trichostomum Warnstorfii. of the leaves as well as in 
Fig. 171. Reduced from Limpricht. the development of the 
* papillae in American 
