EVANS: REPORT ON THE HEPATICAE OF ALASKA 589 
leaves are succubous and bidentate at the apex, much as in 
Lophozia, subgenus Dilophozia K. Miill., but the line of attachment 
is strongly arched, the leaves being slightly decurrent at the 
postical base. In this respect the genus shows a relationship to 
Plagiochila. The leaves in A. orcadensis are imbricated and spread 
somewhat widely from the stem. The margin at the antical base 
is more or less revolute but this condition is much more pro- 
nounced at the postical base, the narrow revolute portion being 
quite unlike anything found in Lophosia. The apical sinus and 
lobes are subject to considerable variation. The sinus is always 
shallow and is sometimes scarcely apparent, the apex of the leaves 
appearing truncate. The lobes are sometimes nothing more than 
rounded corners and are usually rounded or very obtuse even 
when more distinct. Occasionally, however, they are more sharply 
pointed. The leaf-cells are small, measuring about 16 in di- 
ameter in the middle of the leaf and 20X16 uw at the base. Their 
walls are thin and their small trigones have concave or straight 
sides. The cuticle is smooth. 
Soon after Schiffner published A nastrepta as a genus the androe- 
cia and perianths were described by Jérgensen from Norwegian 
material, and K. Miiller has recently added an account of the 
sporophyte from specimens collected by J. Velenovsky near 
Prague. According to Jérgensen* the perianths are slightly 
laterally compressed, but K. Miiller was unable to confirm his 
observations and describes the perianths as bluntly four-angled 
in the upper part and plicate at the contracted mouth. The 
perianths, therefore, are essentially like those of Lophozia, and the 
same thing may be said of the androecia and sporophytes. At 
the same time the peculiar features of the vegetative organs are 
sufficient to justify the maintenance of Anastrepta as a genus. 
The specimens from Baranof are not abundant and lack sexual 
organs. Some of the leaves, however, bear clusters of the char- 
acteristic two-celled gemmae, which are deeply pigmented with 
purple and often show an angular outline. K. Miillert and 
Macvicart may. be consalted | for descriptions and a ee i ne 
ES TENG Mus. Aarb. ERG) 3-5. ph 1; 19014: 3-5. pl. I. 
t Rabenhorst’s Kryptogamen-Flora 6: 753. f. 335, 337+ 1910. 
} Student’s Handb. British Hepat. 213. f. 1-4. 1912. 
