Orthotrichum microblepharum

Orthotrichum microblepharum Schimp. Musci
Eur. Novi (1-2:) Orthotr. 2. 1864.
Orthotrichum Blytlii Schimp. Musci Eur. Novi (1-2:) Orthotr. 3. 1864. Orthotrichum arcticum Schimp. Musci Eur. Novi (1-2:) Orthotr. 5. 1864. Orthotrichum groenlandicum Berggr. Sv. Vet.-Akad. Handl. II. 13 8 : 23. 1875. Orthotrichum idahense Card. & Ther. Bot. Gaz. 30: 19. 1900.
Plants in dense, wide tufts, brownish below, olive above, 1-3 cm. high ; leaves much as in 0. laevigatum f appressed-imbricate when dry, ovate-lanceolate, obtuse to broadly acute, the margins recurved almost to the apex; upper leaf -cells rounded, densely papillose with one or more simple or forked papillae which are variable on different leaves of the same plant, sometimes extending nearly to the base along the margins, the basal cells rectangular and usually smooth; autoicous; seta 1-2 mm. long; capsules nearly or entirely exserted, pyriform, when dry urceolate and abruptly narrowed to the twisted neck, strongly plicate with 8 ribs, much like those of Ulota crispa var. crispula; calyptra hairy, covering the capsule; stomata superficial, mostly near the base of the spore-sac, often in groups of 2-5 ; annulus persistent, below it 5-9 rows of small, rounded, thickwalled cells; operculum conic-apiculate ; peristome-teeth 16, united in pairs, finely and densely papillose, more or less trabeculate and perforate at the apex, closely reflexed when dry, sometimes dark orange, the segments 8, linear, shorter than the teeth, of 1 or 2 rows of cells, often poorly developed, usually slightly papillose; spores 16-21 /x in diameter, finely papillose, usually maturing in spring.
Type locality: Norway.
Distribution: On rocks at high altitudes and latitudes; Greenland; Newfoundland (Waghornt) Labrador; Isles aux Coudres in the St. Lawrence River (M .-Victor in) ; Kodiak Island {Macoun); Pribiloff Islands; Unalaska {Flett); Nevada County, California (Leiberg 5468, 5469 , 5472 , 5474); on trees in the Lake Superior region and in Cook County, Minnesota.