Dicranella

Dicranella cf. coarctata, photographed by Li Zhang.

Belongs within: Dicranaceae.

Dicranella is a genus of mosses found worldwide, most species of which are small with narrow, silky leaves (Dixon 1924). They can be distinguished from members of the related genus Dicranum by the relatively undifferentiated alar cells in their leaves.

Characters (from Smith & Smith 2004): Usually dioicous. Leaves narrow, differentiated in sheathing base and acuminate limb or gradually tapering from insertion, more or less secund or squarrose; margins usually plane, entire or denticulate above; costa ending apex to excurrent; cells rectangular, smooth, alar cells not differentiated. Setae straight, capsules inclined, symmetrical or gibbous, sometimes strumose; annulus present or not; peristome teeth reddish, 16, bifid or divided to about middle in flat segments, papillose above, point-striate below; calyptrae cucullate.

<==Dicranella (Müll.Hal.) Schimp. 1856 SK02
    |--D. apophysatula (Müll.Hal.) Broth. 1901 [=Aongstroemia apophysatula, Microdus apophysatulus] SK02
    |--D. baileyana (Müll.Hal.) Broth. 1901 [=Aongstroemia baileyana, Microdus baileyanus] SK02
    |--D. cardotii (R.Br.bis) Dixon 1923 [incl. D. wattsii, Anisothecium wattsii, Dichodontium wattsii] SK02
    |--D. cerviculata [=Dicranum cerviculatum] D24
    |    |--D. c. var. cerviculata D24
    |    `--D. c. var. pusilla [=Dicranum pusillum] D24
    |--D. clathrata [=Anisothecium clathratum (Hooker & Wilson) Broth. 1924] SK02
    |--D. coarctata (Müll.Hal.) Bosch & Sande Lac. 1858 SK02
    |--D. crispa [=Dicranum crispum] D24
    |--D. curvata [=Dicranum curvatum] D24
    |--D. dietrichiae (Müll.Hal.) Jaeger 1872 (see below for synonymy) SK02
    |--D. euryphylla Dixon 1942 SK02
    |--D. grevilleana [=Dicranum grevilleanum, Anisothecium grevillei] D24
    |--D. heteromalla [=Bryum heteromallum; incl. D. fusco-rufa] D24
    |    |--D. h. var. heteromalla D24
    |    |--D. h. var. interrupta [=Dicranum interruptum] D24
    |    |--D. h. var. orthocarpa non D. curvata f. orthocarpa Thériot 1896 D24
    |    |--D. h. var. sericea D24
    |    `--D. h. var. stricta D24
    |--D. hookeri (Müll.Hal.) Cardot 1906 (see below for synonymy) SK02
    |--D. howei Renauld & Cardot 1893 SK02
    |--D. jamesonii (Mitt.) Broth. 1901 [=Anisothecium jamesonii, Leptotrichum jamesonii] SK02
    |--D. paucifolia (Müll.Hal.) Paris 1900 [=Aongstroemia paucifolia] SK02
    |--D. perrottetii J87
    |--D. pycnoglossa (Broth.) Kindb. 1891 [=Anisothecium pycnoglossum] SK02
    |--D. rufescens [=Bryum rufescens, Anisothecium rufescens] D24
    |--D. schreberiana (Hedw.) Hilf. ex Crum & Anderson 1981 SK02 (see below for synonymy)
    |    |--D. s. var. schreberiana D24
    |    `--D. ‘schreberi’ var. elata D24
    |--D. secunda [=Dicranum secundum; incl. Dicranella subulata] D24
    |--D. squarrosa [=Dicranum squarrosum, Anisothecium squarrosum] D24
    |--D. stackhousiana (Müll.Hal.) Broth. 1901 [=Aongstroemia stackhousiana, Microdus stackhousianus] SK02
    |--D. staphylina M08
    |--D. vaginata SK02
    |    |--D. v. var. vaginata SK02
    |    `--D. v. var. longifolia SK02 [=Ditrichum flexicaule var. longifolium M49, D24]
    `--D. varia [=Dicranum varium; incl. Anisothecium rubrum] D24
         |--D. v. var. varia D24
         |--D. v. var. callistoma [=Bryum callistomum] D24
         |--D. v. var. tenella D24
         `--D. v. var. tenuifolia [=Dicranum tenuifolium] D24

Nomina nuda: Dicranella brevisetacea Geh. ex Watts & Whitel. 1902 SK02
             Dicranella pycnoglossa var. longifolia Broth. & Watts 1918 non D. vaginata var. longifolia SK02
             Dicranella muelleri Hampe ex Bailey 1883 SK02
             Dicranella pellucida Broth. ex Watts & Whitel. 1899 SK02
             Dicranella schreberi f. procera Watts & Whitel. 1902 SK02
             Dicranella trichodontoidea Müll.Hal. ex Geh. 1876 SK02

Dicranella dietrichiae (Müll.Hal.) Jaeger 1872 [=Aongstroemia dietrichiae; incl. A. tricruris, Dichodontium tricrure, Dicranella tricruris (Müll.Hal.) Mitt. 1882] SK02

Dicranella hookeri (Müll.Hal.) Cardot 1906 [=Anisothecium hookeri (Müll.Hal.) Broth. 1924; incl. Aongstroemia perdivaricata, Dicranella perdivaricata] SK02

Dicranella schreberiana (Hedw.) Hilf. ex Crum & Anderson 1981 SK02 [=Anisothecium schreberianum (Hedw.) Dixon 1934 SK02; incl. A. crispum SK02, Dicranum schreberi D24, Dicranella schreberi SK02]

*Type species of generic name indicated

REFERENCES

[D24] Dixon, H. N. 1924. The Student's Handbook of British Mosses 3rd ed. V. V. Sumfield: Eastbourne.

[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.

[M08] Marstaller, R. 2008. Moosgesellschaften am Südrand des Kyffhäusergebirges bei Bad Frankenhausen (Kyffhäuserkreis). 130. Beitrag zur Moosvegetation Thüringens. Mauritiana 20 (2): 289–348.

[M49] Martin, W. 1949. Distribution of the mosses indigenous to New Zealand (supp. no. 1). Transactions and Proceedings of the Royal Society of New Zealand 77 (3): 355–360.

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.

Last updated: 21 December 2017.