Mosc Exorici. 
POLYTRICHUM ANGUSTATUM. . 
Polytrichum caule brevi, foliis lineari-lanceolatis undu- 
latis, siccitate crispatis, versus apicem dorso margine- 
que denticulatis, nervo lato lamellato, capsula erecta 
eae operculo brevi-subulato, calyptra glabra. 
AB 
P. angustatum. Brid. Hist. Musc. Suppl. \. p. 78. 
Schwaegr. Sp. Muse. v. ii. p. 33). 
Has. Prope Boston in America septentrionali. D. Boott. (In 
Caroline humosis Cl. Bosc. In Pennsylvania Muhlenberg. In 
Neomarchia lectum Til. Schultz. dedere.) Schwaegr. loc. cit. 
Caulis semiuncialis, simplex. Folia lineari-lanceolata, obtusi- 
pet, plants nat, size. Fig. 2, inner view of leaf. Fig. 3, 
ececnen. 8-4, capsule, Fig. 5, operculum, Fig. 6, ¢8- 
_® Already known as “soo 
Metioal Botong as the author of Florula Bostoniensis and American 
