— io8 — 
Thallus variable in expansion but sometimes spreading, both hypo- 
phloeous and epiphloeous, indicated to the eye by a filmy determinate area 
lighter in color than the surrounding bark. Apothecia sparse and scattered, 
or abundant, the stipes relatively stout, averaging 0.5 mm. in height, erect, 
cylindrical, black, cortex smooth and shining, abruptly dilating into a 
turbinate or sub-globose capitulum likewise shining, the sporal mass not 
noticeably extruded, epruinose or rarely slightly suffused at the apex of the 
capitulum. Spores ellipsoid, brown, simple or indistinctly bilocular 11-15 
X §-7 in linear cylindrical thekes. 
On the main stems and larger branches of Rhus typhina, Rockland, 
Knox Co., Maine, May 28, 1909, G. K. Merrill, and on same substratum 
Ottawa, Ontario, J. Macoun. 
Tuckerman in Genera p. 241 remarks that C. CurtisuXs associable with 
the cluster which shall include C , byssacetim Fr. , but the plant here 
described presents no characters in common with Stenocybe. The thallus of 
the present is not unlike that of C. minutissimum above described, but it is 
likewise similar to the visible thallus of many of the obscure forms of 
Arthoiiia and Pyrenula found growing on smooth barks. 
Rockland, Maine. 
NOTE ON AMBLYSTEGlUn NOTEROPH1LUM. 
(The following’ extract from Mr. Hill’s letter will explain itself.) 
I am now able to offer fruiting specimens of Amblystegium notero- 
philum (Sulliv. ) Holzinger, this being the first time I have found it in fruit. 
1 was led to anticipate the date by finding plants in August, 1908, with both 
archegonia and antheridia numerous and well developed. As the station is 
nearly forty miles from my home I could not keep in close touch with their 
development, but went after them when it seemed probable they would be in 
fruit. This, as the label shows, was June 25th, 1909. I found them fruiting 
freely, but should have been two weeks earlier. However they show the 
peristome very well, and so I offer them. 
Its time of maturation as shown by this is early June. I assume that 
fruiting plants are quite rare; you will recall that it is the only species whose 
sporophyte is figured by Cheney in his article on North American Species of 
Amblystegium (Bot. Gaz. 24; 236, 1897) as he did not know of any figure of 
the capsule published elsewhere. 
I have collected the moss in three more localities in small tributaries of 
the Desplains river, but they have been the submerged form. It is com- 
monly plentiful where it grows forming tufts adhering to stones and with a 
Iiabit quite like a Fontinalis, and may easily be taken for one at first sight. 
The water it frequents is commonly cold, usually in the outlet of springs or 
in their neigborhood, or in spring-fed streams, the water calcareous. 
Several years ago I collected it at Boyne Falls, Michigan. It was there 
attached to logs and sticks in Boyne river, associated with Fissidens grandi- 
frons . It was in an Arbor Vitae wood, the water cold, and abounding in 
