Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part Two: Orthotrichales to Polytrichales. Mem. New York Bot. Gard. 69 (2)
Leskeaceae
Species Description - Stems and branches loosely foliate; paraphyllia few to fairly abundant, ending in a sharp cell. Stem leaves loosely erect, frequently flexuose or subsecund at the tips when dry, about 0.9-1.4 mm long, ovate or ovate-lanceolate, gradually or abruptly long-acuminate (the base about as long as the acumen), ± biphcate at the base; margins revolute below, sinuate-serrulate above; costa subpercurrent; cells hexagonal to rhombic, unipapillose over the lumina. Branch leaves erect and often ± incurved when dry, ovate-lanceolate, acuminate Setae 15-30 mm long; capsules 1.5-2 mm long; operculum apiculate to short-rostrate; ciha of endostome appendiculate, in groups of 3-4. Spores 9-11 µm, nearly smooth.
Fig. 642a-e
H. microphyllum (Hedw.) Broth, in E. &P., Nat. Pfl. 1(3): 1007.1907.
Hypnum microphyllum Hedw., Sp. Muse. 269.1901.
Bryohaphcladium microphyllum (Hedw.) Wat. & Iwats., J. Jap. Bot. 56: 260.1981.
Loose, once-pinnate branching and short, unipapillose leaf cells aid in recognition. The species is exceedingly variable, but Haplocladium angustifolium, a widespread variant that is more commonly green and suggestive of an Amblystegium, with rather longer-pointed, lanceolate leaves with longer cells and papillae at the upper ends, can usually be sorted out.
Cardot (1911) and also Reimers (1937) referred here Bescherelle's report of Thuidium virginianum (Brid.) Lindb., also known as Haplocladium virginianum (Brid.) Broth, and widely distributed in eastern North America.
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