Hypnum


Hypnum cupressiforme, from here.

Belongs within: Hypnales.

Hypnum is a large genus of mosses found worldwide. While more clearly defined than in the past, Hypnum remains a repository for a number of pleurocarpous mosses of less certain relationships, and its content may still require revision. Species within the genus are predominantly distinguished by features of the gametophytes, but this may be complicated by a certain degree of morphological plasticity in relation to growth habitat.

Characters (from Smith & Smith 2004): Autoicous or dioicous. Stems creeping to erect, more or less unbranched to closely pinnately branched. Branches long or short. Pseudoparaphyllia usually present. Stem leaves straight to falcate or circinate, secund, narrowly lanceolate to broadly ovate, gradually or abruptly narrowed to acute to filiform apex; margins plane or recurved, entire or denticulate; costa short and double or absent; basal cells usually narrowly rhomboidal, incrassate, porose or not, alar cells distinct, quadrate to rectangular, thin-walled to incrassate, hyaline or not, cells above elliptical to linear-vermicular. Branch leaves more or less similar to stem leaves but smaller. Setae long, reddish, smooth; capsules erect to horizontal, obloid to cylindrical, straight or curved; lid mamillate to conical with subulate beak; exostome teeth transversely striate below, longitudinally point-striate, papillose or smooth above, endostome with tall basal membrane and cilia.

<==Hypnum Hedw. 1801 SK02
    |--H. alternans Brid. 1801 SK02
    |--H. campbellianum [=Thuidium campbellianum; incl. Aequatoriella bifaria] SK02
    |--H. chrysogaster Müll.Hal. 1851 (see below for synonymy) SK02
    |--H. cupressiforme Hedw. 1801 [=Stereodon cupressiformis] SK02
    |    |--H. c. var. cupressiforme [incl. H. c. var. minus, Stereodon cupressiformis var. minor] SK02
    |    |--H. c. var. filiforme Brid. 1801 SK02 (see below for synonymy)
    |    |--H. c. var. lacunosum Brid. 1801 SK02 [=H. lacunosum (Brid.) Hoffmann ex Brid. 1819 PL04]
    |    `--H. c. var. mossmanianum (Müll.Hal.) Ando 1982 (see below for synonymy) SK02
    |--H. falcatum D03
    |--H. fuegianum D03
    |--H. heseleri VHJ03
    |--H. longifolium D03
    |--H. megapolitanum [=Rhynchostegium megapolitanum] SK02
    |--H. nelsonii (Broth.) Paris 1896 [=Stereodon nelsonii] SK02
    |--H. pallescens VH02
    |--H. perplicatum Dusén 1903 D03
    |--H. polypterum J87
    `--H. subchrysogaster (Broth.) Paris 1900 [=Stereodon subchrysogaster] SK02

Nomina nuda: Hypnum antipodum Hampe 1880 [=Rhynchohypnum antipodum Hampe ex Wijk, Margad. & Florsch. 1967, Rhynchostegium antipodum Mitt. 1882] SK02
             Hypnum austromontanum Hampe 1880 [=Rhynchostegium austromontanum Mitt. 1882] SK02
             Hypnum brachytheciella Müll.Hal. ex Bailey 1886 [=Rhaphidostegium brachytheciella Müll.Hal. ex Burges 1935] SK02
             Hypnum brevicolle Hampe 1880 SK02
             Hypnum decurvatum Hampe 1880 [=Porotrichum decurvatum Hampe ex Mitt. 1882] SK02
             Hypnum exalare Müll.Hal. ex Bailey 1886 SK02
             Hypnum flagellaceum Paris 1900 [=Stereodon flagellaceus Broth. & Burchard ex Weymouth 1893] SK02
             Hypnum hodgkinsoniae Müll.Hal. ex Muell. 1880 SK02
             Hypnum incurvum Hampe 1880 [=Rhynchostegium incurvum Mitt. 1882] SK02
             Hypnum lineatum Hooker & Wilson ex Hampe 1880 SK02
             Hypnum luridulum Müll.Hal. ex Muell. 1880 SK02
             Hypnum microflagellare Müll.Hal. ex Bailey 1888 SK02
             Hypnum myurium Müll.Hal. ex Muell. 1880 SK02
             Hypnum novae-cambriae Hampe 1880 [=Porotrichum novae-cambriae Mitt. 1882] SK02
             Hypnum obtusifolium Müll.Hal. ex Muell. 1880 SK02
             Hypnum parramattense Hampe & Müll.Hal. ex Hampe 1880 [=Rhynchostegium parramattense Mitt. 1882] SK02
             Hypnum perpumilum Müll.Hal. ex Muell. 1880 SK02
             Hypnum pseudodemissum Müll.Hal. ex Hampe 1880 SK02
             Hypnum pseudohomomallum Müll.Hal. ex Geh. 1876 SK02
             Hypnum pseudopilaceum Hampe 1880 [=Porotrichum pseudopilaceum Mitt. 1882] SK02
             Hypnum pseudopraelongum Müll.Hal. ex Muell. 1880 SK02
             Hypnum pumilum Hooker & Wilson ex Hampe 1880 SK02
             Hypnum rubens Hampe & Müll.Hal. ex Paris 1898 SK02
             Hypnum strictiusculum Müll.Hal. ex Bailey 1886 SK02
             Hypnum strumiferum Hampe 1881 [=Rhynchostegium strumiferum Mitt. 1882] SK02
             Hypnum subpungens Hampe & Müll.Hal. ex Hampe 1880 SK02
             Hypnum umbilicatulum Müll.Hal. ex Geh. 1876 [=Isopterygium umbilicatulum Mitt. 1882, Isothecium umbilicatulum Mitt. ex Wijk, Florsch. & Margad. 1964] SK02
             Hypnum vesiculifolium Müll.Hal. ex Muell. 1880 SK02
             Hypnum wilhelmii Müll.Hal. ex Muell. 1880 SK02

Hypnum chrysogaster Müll.Hal. 1851 [=H. cupressiforme var. chrysogaster, Stereodon chrysogaster; incl. H. patale] SK02

Hypnum cupressiforme var. filiforme Brid. 1801 SK02 [=H. cupressiforme f. filiformis SK02, Stereodon cupressiforme var. filiforme M49]

Hypnum cupressiforme var. mossmanianum (Müll.Hal.) Ando 1982 [=Stereodon cupressiformis var. mossmanianus; incl. Drepanohypnum walterianum, Hypnum walterianum, H. walteri (l. c.), Isopterygium walterianum, Stereodon walterianus] SK02

*Type species of generic name indicated

REFERENCES

[D03] Dusén, P. 1903. Patagonian and Fuegian mosses. In Reports of the Princeton University Expeditions to Patagonia, 1896-1899, vol. 8 – Botany (W. B. Scott, ed.) pp. 63-126. The University: Princeton (New Jersey).

[J87] Judd, W. S. 1987. Floristic study of Morne La Visite and Pic Macaya National Parks, Haiti. Bulletin of the Florida State Museum – Biological Sciences 32 (1): 1-136.

[M49] Martin, W. 1949. The bryophytes of Stewart Island.—Part I. Transactions and Proceedings of the Royal Society of New Zealand 77 (2): 257-277.

[PL04] Pohl, G., & I. Lenski. 2004. Zur Verbreitung und Vergesellschaftung von Pennisetum orientale Rich. in Nordeuböa (Griechenland) (Poaceae, Paniceae). Senckenbergiana Biologica 83 (2): 209-223.

Smith, A. J. E., & R. Smith. 2004. The Moss Flora of Britain and Ireland, 2nd ed. Cambridge University Press.

[SK02] Streimann, H., & N. Klazenga. 2002. Catalogue of Australian Mosses. Flora of Australia Supplementary Series 17. Australian Biological Resources Study: Canberra.

[VH02] Vanderpoorten, A., L. Hedenäs, C. J. Cox & A. J. Shaw. 2002. Phylogeny and morphological evolution of the Amblystegiaceae (Bryopsida). Molecular Phylogenetics and Evolution 23 (1): 1-21.

[VHJ03] Vanderpoorten, A., L. Hedenäs & A.-L. Jacquemart. 2003. Differentiation in DNA fingerprinting and morphology among species of the pleurocarpous moss genus, Rhytidiadelphus (Hylocomiaceae). Taxon 52: 229-236.

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