Allg. Bot. Z. Syst.13: 162. 1907,
North America, Mexico, Europe, Asia.
Species 3 or 4 (2 in the flora).
Paraleucobryum is a rather peculiar member of the Dicranaceae because of its unique leaf structure. In the leaf cross section there is an adaxial and abaxial layer of hyalocysts and a median layer of chlorocysts. Sometimes a few chlorocysts are in the abaxial layer of cells in some species. Brothera and Atractylocarpus have a very similar leaf structure and are the reason that the three genera are often placed in the same subfamily, Paraleucobryoideae. Both B. H. Allen (1999) and P. Müller and J.-P. Frahm (1987) presented extensive discussion on the relationship of Paraleucobryum to other members of the Dicranaceae. They also discuss what may be heterospory or bimodal spores in P. longifolium.
|1||Costa with longitudinal striations, formed by rows of teeth evident at high magnifications, on abaxial surface (especially conspicuous in distal half); leaf margins serrulate near apex.||Paraleucobryum longifolium|
|1||Costa smooth on abaxial surface; leaf margins entire or rarely with a few teeth at apex.||Paraleucobryum enerve|
|Author||Robert R. Ireland Jr. +|
|Basionym||Dicranum Paraleucobrym +|
|Etymology||Greek para-, near, and genus Leucobryum, alluding to resemblance +|
|Illustrator||Patricia M. Eckel +|
|Reference||allen1999a +, barnes1958a + and ireland1994b +|
|Taxon name||Paraleucobryum +|
|Taxon parent||Dicranaceae +|
|Taxon rank||genus +|
|Volume||Volume 27 +|