—27— 



base in most of the leaves; the leaf median cells are 0.012 mm. in diameter. 

 The capsule is always curved, nodding, scarcely furrowed when old, and wide- 

 mouthed, gradually narrowing from mouth to seta; the exothecial cells are 

 mostly elongated and sinuous walled. In the United States this species seems 

 to be the only one found any distance east of the Rocky Mountains. It also oc- 

 curs on the Pacific slope. It usually gi-ows on damp shady banks, sometimes 

 on the base of trees. 



T. niegapolitana has a leaf base wider than the blade above, median cells 

 about 0.008 mm. in diameter; ripe capsule nearly straight, becoming furrowed 

 with age and mouth not wider than capsule below; the exothecial walls irregu- 

 lar, scarcely elongated, and sinuous walled. Usually growing at a somewhat 

 higher elevation than T. cucullata, on rather dry soil at the base of ledges of 

 rocks. Rocky Mountains and northward. 



The European T. cucullata was from near Archangel, Russia. 



* * * 



In the Bulletin of the Torrey Botanical Club for December, 1900 (27: 648- 

 649), Mrs. Britton has the following notes: 



" DiDVMODON RiPARius Aust.— This species was described as Pottia ri- 

 paria Aust. in the Supplement to Sullivant's Icones in 1874, and the fruit was 

 figured on Plate 21. In 1880, Warnstorf described Rai-hula lingulata, which 

 Limprirht later changed to Trichostonmm llarfis/orjii {Lauhm. l: 5S7. 1888) 

 the specific name being preoccupied. In 1892, Kindberg in Macoun's Catalogue, 

 described Leptodontiiim Canadeuse, as a new species, remarking that ' it is rather 

 peculiar that this genus had not been represented before in North America.' In 

 the Bryineae of F.urope and North America, he described this species as Didy- 

 utodon Macounii Kindb. (new name) and referred Pottia riparia Aust. to Didy- 

 inodon ripai-ius Aust., the name it bore in Austin's herbarium. I have critically 

 compared all these specimens and am persuaded that they are one and the same 

 species, characterized by very peculiar brood-bodies, borne on long slender fila- 

 ments, either in clusters in the axils of the leaves or at the summit of the stems, 

 mixed with the archegonia and seeming to replace the paraphyses. Limpricht 

 figured them on page 5S8, F"ig. 171 of the Laubmoose. and Correns in his Unter- 

 suchen der Laubmoose has also figured and described them as Trichostomum 

 Warnstorfii. The European specimens have not been found fruiting, and 

 Austin's station on the Palisades is the only one thus far discovered where it is 

 known to fruit. It has probably been overlooked in many places, on account of 

 its small size, dirty appearance, and sterility. The following stations are re- 

 corded for North America: On rocks in streams. Palisades of northern New 

 Jersey and southern New York, C. F. Austin; Niagara Falls, F. Wolle;? Wat" 

 kins; Chilson Lake, Mrs. Harris; Bashbish Falls, R. S. Williams. Penna. : 

 Bethlehem, Rau and Wolle; Pocono Mt., T. C. Porter. Springfield, Ohio, Miss 

 Biddlecome; Owen Sound, Ont., J. Macoun. In Europe it is only known in 

 Switzerland from the Rhine at Schaft'hausen and in the lake at Zurich." 



Mrs. Britton and Mr. Ernest S. Salmon have agreed that Grimmia Phili- 

 boiiaua E. (i. Britton, is a synonym of Grhnmia anomala Hpe. This species 

 has never bean found fruiting in Europe, but was collected in fruit in Idaho by 



