Dicranum anderssonii

Dicranum anderssonii (Wich.) Schimp. Syn. 689. 1860
Arctoa Anderssonii Wich. Flora 42: 432. 1859.
Autoicous: plants in low, compact, dark-colored tufts; stems radiculose and more or less branching above: lower leaves small, the upper much larger, erect-spreading, flexuous when moist, incurved when dry, sometimes sub-secund; upper stem-leaves 2-3 mm. long, from an
v ovate-lanceolate base gradually narrowed to a long flexuous point, slightly crenate on the incurved margin above; costa of homogeneous cells, often weak below, 25-40 fi wide, one sixth to one eighth the width of the leaf -base and rather long excurrent; leaf-cells in the upper part of the blade with thickened walls, rectangular, about 6 ju wide and 20-30 /x long, becoming much shorter and broader just above the colored, sometimes inflated, often not very distinct alar cells; inner perichaetial leaves ra.her faintly nerved below, longer than the stem-leaves, up to 4 mm. long, from a loosely clasping, involute base rather gradually narrowed to a not quite entire point shorter than the clasping part: seta stout, erect, about 3 mm. long: capsule short, scarcely projecting above the leaves, with a broad mouth, in diameter nearly equaling the height of capsule; exothecal cells with rather uniformly thickened walls, the median ones about 20 m by 30-50 ju; stomata in mostly one row near the base of the spore-sac, about 25 £t by 30^; annulus compound; peristome-teeth 80 /u wide at the base, mostly divided more than one half down, vertically striate; lid convex, with a short oblique beak, its height about equal to its basal diameter: spores not quite smooth, up to 20 x in diameter.
Type u>cality : Lapland .
Distribution: Port Wells, Alaska; also in northern Europe.