—26— 



channeled above; lower leaves very small, 0.5 mm. long, perceptibly larger 

 above; upper ones i mm. long, margins plane or scarcely revoliite, entire; costa 

 vanishing in the apex or hardly reaching it, papillose on the back; lower cells 

 pellucid, somewhat lax, smooth, oblong, sub-rectangular; the median quadrate; 

 the upper ones small scarcely 4-5 /^ long, rounded-quadrate, obtuse, minutely 

 papillose. Perichaetial leaves larger than the stem leaves, the outer appressed 

 at the half-sheathing base, rather abruptly elongated into a channeled spreading 

 or recurved acumen; the inner ones broadly and shortly acuminate, areolation 

 pellucid throughout. Capsule 1-2 mm. long, 0.3-0.4 mm. broad, oblong, erect 

 or oblique, on a pale slender seta 12-18 mm. long, twisted to the right when dry; 

 operculum conic-subulate, equalling or surpassing the capsule. Annulus com- 

 pound, 0.07 mm. broad. Peristome deep red; basal membrane 0.08 mm. high, 

 teeth twisted, about i mm. long, strongly granulose. Spores smooth, 8// in di- 

 ameter. Male flowers unknown. Very probably dioicous. (p. 17. />/. /^'. ) 



Idaho: Cedar creek, Latah county, on ground (L. F. Henderson, 1897). 



This moss, received from Mr. Henderson only in very small quantity, seems 

 a miniature of B. flavipes B. & S., from which, besides in its small size, it dif- 

 fers chiefly by the lid as long as the capsule, or even longer. By this character, 

 as well as by the form of the leaves, it resembles also Ttichostomuui dicranoides 

 Sch. ( T. macrostegiiim Sull. Icon. Suppl. 35, />/. 22) from Central and South 

 America and the Antilles, which has been also recorded from Alabama; but this 

 last species has the beak of the lid thinner, the leaves larger, broader, denticu- 

 late above, a less opaque areolation of larger and more distinct cells, and the 

 peristome less twisted, with a shorter basilar membrane. 



* * * 



PoLYTRicHUM Jense.vii Hageu, in Meddelelser om Gronland, 15: 444. 1898. 



This very rare European species was collected on the shore of Beaver Lake 

 in the Yellowstone National Park in the summer of 1898 by Prof. Aven Nelson. 

 It is closely related to P. co)n»tuii<: having the terminal cells of the lamellae of 

 the same general form. Prof. Nelson's plants are sterile and were at first 

 thought to be a diseased form of P. commune, but a careful study of the plant 

 by Dr. 1. Hagen and others established the identity of the plant beyond reason- 

 able doubt. It is more slender and lighter colored than P. commune. The 

 leaves are shorter and more erect when moist, nearly entire, and with much less 

 slender apex, being acute instead of slenderly acuminate. At the point of tran- 

 sition between the sheathing base and the lamina there is a dark brown spot on 

 each side of the costa, caused by shrinking; at this point the leaves break off 



easily. — From an article by J. M. Holzinger in Asa Gray Bulletin, 3: 95-99./. 6. 

 October, 1900. 



CURRENT BRYOLOQICAL LITERATURE. 



In the Revue Bryologique for January, 1901 (28; i), Mr. R. S. Williams re- 

 ports the receipt of a specimen of Timmia cucullata Mx. from Europe, under 

 the name of T. megapolitana Hedw. T. cucullata has not before been cred- 

 ited to Europe. 



T. cucullata has the leaf as wide above or even wider than the clasping 



