Monographs Details: Dendroalsia
Authority: Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part Two: Orthotrichales to Polytrichales. Mem. New York Bot. Gard. 69 (2)
Description:Genus Description - Coarse, robust, rigid plants in loose, dull, dark-green or brown tufts. Primary stems creeping, stoloniform, moderately radiculose. Secondary stems erect, pinnately frondose above a stipitate base; paraphyllia abundant, multiform. Branches often curled and turned to 1 side when dry. Stipe leaves erect, somewhat longer than branch leaves, with costa slightly excurrent. Branch leaves erect and indistinctly plicate when dry, erect-spreading in 5 distinct rows when moist, lanceolate, gradually tapered to a narrow but blunt apex; margins recurved near the base, serrate in the upper half; costa strong, ending near the apex, toothed-papillose at back; upper cells short-elliptic, coarsely papillose at the upper end at back; basal elongate the costa, rounded- to oblate-quadrate in numerous oblique rows at margins. Dioicous. Inflorescences numerous, on the branches. Perichaetial leaves sheathing with ± spreading tips, entire margins, and smooth cells. Setae short, straight, smooth; capsules barely exserted, erect, oblong-ovoid, brown or red-brown and ± shiny, wrinkled-furrowed when dry; annulus revoluble; operculum obliquely long-rostrate from a conic base; exostome inserted at the mouth, fused at base, narrowly lance-subulate, white, smooth below, densely papillose above; endostome nearly as long as the teeth, with slender, white, keeled, narrowly perforate, coarsely papillose segments rising from a very low membrane, without ciha. Spores spherical, finely papillose. Calyptrae cucullate, covering the upper part of the urn, smooth, naked.
A genus of a single species, Dendroalsia was moved by Manuel (1975) from the Cryphaeaceae to the Leucodontaceae.
Although the family is large and heterogeneous, Dendroalsia seems suitably positioned in the Leucodontaceae owing to its
dioicous sexual condition and cucullate calyptrae, as well as such intangibles as habitat, appearance, and areolation of leaves.
Distinctive features of the genus include the rhizomatous growth and frondose branching above a stipitate base, presence of
paraphyllia, and coarse papillosity of leaf cells. The curling ofthe fronds, when dry, is very curious.