Difference between revisions of "Calliergon orbicularicordatum"

(Renauld & Cardot) Brotherus in H. G. A. Engler and K. Prantl

in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam. 231[I,3]: 1037. 1909.

Endemic
Basionym: Hypnum orbicularicordatum Renauld & Cardot Bull. Herb. Boissier 4: 19. 1896
Treatment appears in FNA Volume 28. Treatment on page 392. Mentioned on page 391.
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|publication year=1909
 
|publication year=1909
 
|special status=Endemic
 
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V28/V28_614.xml
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|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V28/V28_614.xml
 
|genus=Calliergon
 
|genus=Calliergon
 
|species=Calliergon orbicularicordatum
 
|species=Calliergon orbicularicordatum

Revision as of 23:47, 27 May 2020

Plants medium-sized to large, brownish yellow. Stems unbranched or sparsely branched (few shoots seen); axillary hair apical cell elongate-rectangular to short-linear. Stem leaves broadly ovate or broadly ovate-cordate; costa single, 90–109 µm wide near base, ending shortly below apex; alar regions indistinctly delimited, broadly oblong to transversely triangular, from margins 65–80% distance to costa; proximal laminal cells to 2 times as wide as distal cells; medial cells to 18(–20) µm wide proximally, 40–126 × 7–12(–14) µm in distal 1/3–1/2. Sexual condition unknown. Spores unknown.


Habitat: Habitat unknown
Elevation: elevation unknown

Discussion

It is unclear whether Calliergon orbicularicordatum is an expression of another Calliergon species from unfavorable conditions or if it should be recognized as a distinct species. K. Karczmarz (1971) reported C. orbicularicordatum from Alaska, Greenland, and Svalbard, but the features he used to distinguish this taxon are unclear.

Selected References

None.

Lower Taxa

None.