Heterocladium dimorphum

(Bridel) Schimper in P. Bruch and W. P. Schimper

in P. Bruch and W. P. Schimper, Bryol. Europ. 5: 153. 1852

Basionyms: Hypnum dimorphum Bridel Muscol. Recent., suppl. 2: 149. 1812
Treatment appears in FNA Volume 28. Treatment on page 370. Mentioned on page 369.
Stems with epidermal cells smooth. Leaves spreading to erect-appressed when dry, erect-spreading when moist; stem leaves to 1 mm; margins serrate to serrulate; apex acute; costa usually double and short to just below mid leaf; laminal cells papillose, papillae 1 at distal ends; basal cells smooth.

Habitat: Rock, soil, humus
Elevation: low to high elevations


V28 581-distribution-map.gif

B.C., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Alaska, Calif., Maine, Mich., Mont., N.H., Oreg., S.Dak., Wash., Wyo., South America, Europe.


The laminal cells of Heterocladium dimorphum are best described as prorate rather than papillose, as the papillae are at the distal ends. The prorae are much more difficult to distinguish than the papillae of H. macounii but are most clearly present and observable along the leaf margins. The stem and branch leaves also exhibit a distinct area of elongate cells in the proximal portion of the leaf around the costa extending to the insertion. These cells are smooth and larger than the quadrate laminal cells toward the margin and in the distal portion of the leaf.

Selected References


Lower Taxa


AuthorRobert E. Magill +
Authority(Bridel) Schimper in P. Bruch and W. P. Schimper +
BasionymsHypnum dimorphum +
DistributionB.C. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Alaska +, Calif. +, Maine +, Mich. +, Mont. +, N.H. +, Oreg. +, S.Dak. +, Wash. +, Wyo. +, South America + and Europe. +
Elevationlow to high elevations +
HabitatRock, soil, humus +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorPatricia M. Eckel +
Publication titlein P. Bruch and W. P. Schimper, Bryol. Europ. +
Publication year1852 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V28/V28 581.xml +
Special statusIllustrated +
Taxon familyPterigynandraceae +
Taxon nameHeterocladium dimorphum +
Taxon parentHeterocladium +
Taxon rankspecies +
VolumeVolume 28 +