Trichodon borealis

Trichodon borealis R. S. Williams, Bryologist 14: 5. 1911 Plants gregarious in rather lax tufts about 1 cm. high: stems simple or branching by subapical innovations, about 2-3 mm. high, bare and slightly radiculose below: leaves distant and few below, 4-6, crowded upward and appearing distichous, 1-2 mm. long, with an erectappressed, clasping, oblong-ovate base about 0.5 mm. broad, abruptly contracted into the flexuous circinnate awn; costa broad and distinct at the base, not filling all of the slender, more or less roughened subula, or excurrent, with thickened ends of the short oblong cells projecting; basal cells linear-oblong, smooth; margins slightly crenulate-serrate in the subulate portion, entire below; perichaetial leaves with a broader more abruptly contracted base, clasping the base of the seta and with a longer and more slender awn. Dioicous: male plants 3-5 mm. high, with 1-3 antheridial buds: seta flexuose, straight or curved, 5-7 mm. long: calyptra immature (cucuUate?): capsule erect or inclined, ovoid-cylindric, 1-1.5 mm. long; walls brown with irregular, hexagonal, elongate cells; neck with 1 row of stomata; lid conic, blunt or sl'ghtly rostrate, of large lax cells, with a narrow rim of smaller cells; annulus large, of 3 rows of cells; mouth bordered by darker smaller cells; peristome slightly papillose except at base; teeth slender, irregularly bifid, nodose, brown, with 8-9 joints: spores smooth, up to 13;x in diameter, maturing in summer.
Type locality: On damp earth in a small ravine near Dawson, Yukon Territory. Distribution: Known only from the type locality.