Dicranum lophoneuron C. Müller 1851

Dicranum lophoneuron C. Mull. Syn. 2: 589. 1851
Dicranum Andrieuxii Besch. Mem. Soc. Sci. Nat. Cherbourg 16: 164. 1872.
Dioicous: male plants 2-3 mm. high, on tomentum of the fertile stems: fertile plants in deep tomentose tufts, resembling the larger forms of D. Bonjeani in size and habit: leaves laxly spreading-flexuous, scarcely secund and more or less undulate; upper stem-leaves 9-10 mm. long, from an ovate-lanceolate base gradually narrowed to a rather stout, grooved, often twisted point, sharply dentate on the margins and costa about one third down; costa nearly or -quite percurrent, just above its broadened base about one eighth the width of the leaf, with 2 or more serrate ribs on the back, in cross-section near the middle with 5 or 6 guide-cells, stereidbands above and below, and the outer cells on the dorsal side differentiated; leaf -cells with much thickened and pitted walls, elongate to the apex, the median ones about 12 n wide by 60 fi long, the alar forming a reddish-brown group reaching about one half way to the costa; inner perichaetial leaves convolute, abruptly narrowed to a slender, serrulate point scarcely one half the broader part in length: seta solitary, red, 4 cm. long or more: capsule cylindric, somewhat curved; peristome-teeth divided along the median line only at the apex. (Character of teeth from Bescherelle under D. Andrieuxii.)
Type locality: Michoacan.
Distribution: Apparently known only from the type locality and from "Totoniho" and "Chiquo" (the last two localities given for D. Andrieuxii).
D. Andrieuxii is described as monoicous but the minute male plants grow on the tomentum of the fertile stems just as in D. lophoneuron. I have not seen the capsule, but according to Bescherelle the species especially differs from the other large members of the group by the scarcely divided teeth of the peristome, which if normal is certainly unique among North American species of large size.