108 



specimens. Basal areolation of the leaves less quadrate and 

 more sinuous than figured by Dr. Braithwaite (British Moss 

 Flora, ii. t. xlvii. E), but a specimen collected by him agrees 

 with American specimens (see figs, a, b, 4 and 5). Capsule 

 exserted on a slender, curved pedicel, 3 to 5 mm. long, erect 

 and twisted when dry, less than i mm. long, prolate-spheroidal 

 when young, cylindrical and ridged when old and brown ; 

 operculum with a long, straight beak, just covered with the 

 brownish, mitrate calyptra ; annulus none, peristome also lack- 

 ing on the only specimen which still retained the operculum ; 

 perichaetial leaves three, longer and stouter than the stem-leaves, 

 with a short hyaline, serrulate point, twisted around the base of 

 the pedicel when dry, erect-patent when moist. 



Closely resembling G. tricliophylla, Grev.,but capsule smaller 

 on a pedicel longer in proportion to its size, more closely twisted 

 when dry ; teeth not present on any of the old capsules. Dr. 

 Braithwaithe says, " short jointed filaments producing globose 

 propagula at upper end, are frequent upon the leaves (1. c. 15, f. 

 10) these do not seem to be at all abundant upon American spec- 

 imens, but appear rather as short, bifurcating, irregular filaments, 

 than as moniliform hairs. 

 Grimmia pidvinata (L), Smith. Mixed with G. trichopJiylla 



(147 in part). 

 Grinwiia pidvinata, var. obtusa (Brid.), Huebn. (3 in part). 

 Grimmia trichopJiylla, Grev. (3 in part, 147 in part). 

 Grimmia Donii, Smith. Spokane Falls, Washington (no). 

 Grimmia montana, Br. & Sch. Granite ledges (53). 

 Grimmia ovata, Web. & Mohr. {G. commutata, Huebn.), Lesq. 



& James, Manual, 145). (17). 

 Grimmia ovalis (Hedw.), Lindb. G. ovata, Lesq. & James, 1. c. 



143 not Web. & Mohr). (13). 

 Grimmia microcarpa (Gmel.), Lindb. Rhacomitriiim Sudetinim, 

 Br. & Sch. On gneissoid rocks, west of Lake Pend d'Oreille. 



(102 in part). 

 Grimmia heterosticha (Hedw.), C. Muell. {R. heterosticJmm, 



Brid.) (123). 

 Grimmia patefis (Dicks.), Br. & Sch. {R. patens, Huebn., North 



Fork Basin, Lake Coeur d'Alene, mixed with 102). (127). 

 Grimmia acicidaris (L.), C. Muell. R. aciadare, Brid.) In 



