416 
SUM MAE Y OF CUEEENT KESEAKCHES RELATING TO 
Hymenostomum in North America. — A. LeRoy Andrews 
( Bryologist , 1922, 25, 66-71). In this second contribution is con- 
sidered the case of Astomim Sullivantii. First, A. crispum (Hedw.) 
Hampe is excluded as not being an American species. Then as to 
A. Sullivantii Br. & Sch., the earliest name of the plant is shown to 
be Phascum Muht enter gianum Sw. (1818). The history of this is 
given, as also is the history of A. Sullivantii and A. nitidulum. The 
type of the latter sent by Schimper to Sullivant was lost by Sullivant in 
opening the letter, and no type specimen is to be found in Herb. 
Schimper. But the evidence collected seems to point to A. nitidulum 
being of hybrid origin ; and the plants of it issued in Sullivant and 
Lesquereux’s exsiccati were a form of A. Sullivantii which is synony- 
mous with Hymenostomum Muhlenbergianum (Sw.). The differences 
between the American A. Sullivantii and the European A. crispum are 
pointed out. A. G. 
Stereophyllum Bremondii. — R. Potier de la Varde ( Revue 
Bryologique, 1920, 19-20, figs.). A description of Stereophyllum 
Bremondii Ther. & P. de la V., a new moss collected in Cambodia by 
M. de Bremond d’Ars. It is compared with S. Blatteri Card, from 
Bombay, and comparative drawings of the leaves and areolation of the 
two species are given. It is also compared with S. anceps Bry. Jav. 
from Java. A. G. 
Pedicel of Stereophyllum Bremondii. — R. Potier de la Varde 
{Revue Bryologique , 1920, 35). In reply to an enquiry by H. N. Dixon 
the author states that S. Bremondii has a pedicel which is quite smooth, 
while that of S. Blatteri is highly papillose. A. G. 
Stereodon lignicola : a Rectification. — I. Theriot {Revue Bryo- 
logique , 1920, 71-2). An investigation of Stereodon lignicola Mitt, 
shows that this moss had a mixed diagnosis at the start, belongs to 
Isopterygium , but has been confused with a Sematophyllum. A de- 
scription of the fruit is given. A. G. 
Cornish Sphagna. — F. Rilstone {Journ. of Bot., 1922, 60, 263-7). 
A list of the species and varieties of Sphagnum found in Cornwall with 
their distribution, together with a discussion of the ecology of the 
Sphagna. The commoner species found in the county belong to the 
four groups, Acutifolia, Cuspidata, Subsecunda , Cymbifolia. The 
Cuspidata frequent deep pools on high moors. The Subsecunda have a 
wide range, from the deep pools to the peaty borders of badly-drained 
enclosures. The Acutifolia range from wet bogs to damp peaty road- 
side patches. The Cymbifolia prefer medium habitats, moderately wet 
moors and bogs. As lands are drained the Cuspidata are the first to 
disappear, then the robust Subsecunda , then the Cymbifolia , the last to 
disappear being the more delicate forms of the Subsecunda and some 
of the Acutifolia. Another point to be noted is that the plants of drier 
habitat are species which are abundantly supplied with pores on the 
dorsal surface of the branch-leaves, as opposed to the few-pored species 
of aquatic habit. There is a relation between pore-development and 
habitat. A. G. 
