“ic iy Salle 
372 
structure of Phascum subulatum, but is so different in the stalked, 
elongated capsule, and the campanulate calyptra, that I dedicate 
it to my friend Herr Sporleder, etc.” 
It will be seen from the above remarks that Hampe was labor- 
ing under a mistake when he contrasted the calyptras of B. flexu- 
osa with his Sporledera Beyrichiana, due to the fact that there is a 
a mixture in Schwegrichen’s Supplement, in the figure of the 
calyptra of Phascum flexuosum. Furthermore, a part of the type 
specimen from Hampe’s Herbarium is preserved in Sullivant's 
Herbarium, and although ‘they are immature, yet there is no 
doubt that it is a species of Bruchia, closely allied to the type Spe 
cies of the genus B. flexuosa, which antedates S. Beyrichiana by 
fourteen years. ; : 
The other species, B. palustris (Br. & Sch.) C. Miull., which, 
according to Miiller (Syn. Musc. 1: 19, 1848), was admitted fo" 
this genus by Hampe (in litt.), and is so maintained by Limpricht 
(Rab. Kryptfl. 4: 204), must either be given a new generic name, 
or merged into Bruchia. The absence of the characteristic neck 
of Bruchia would seem to justify its generic rank; the lobate | 
calyptra throws it out of Pleuridium, where Schimper placed tt — 
though it is more liable to-be mistaken for P. subudatum than for 
any species of Bruchia. | 
The original description of Sporledera, calling as it does, for a — 
“large” calyptra, enclosing the capsule, makes it doubtful whether 
Phascum palustre can be included in this genus. Furthermore, it 
is a question whether a genus can be maintained for a species 
subsequently referred to it, when the original species and charac: 
ters of the genus are referable to an older genus. ; 
Notes on some Exoascez of the United States.* 
By Grorce F, ATKINSON. : 
. ich : 
Material has accumulated from several years collecting we" ‘ 
led me to begin the preparation of a paper on the pire a 
species of the Exoascee@ of the United States. Unexpect®! ) 
Z Profits 
* I wish to acknowledge my indebtedness to Prof. Thomas Meehan, St 
Pammel, Mr. J. B. Ellis, Prof, A. B. Seymour and Mrs, Flora W. Patterson, for 1#¥° 
mostly in the communication of material of some of the prunicolous specie 
