Distichium hagenii

H. Philibert

Rev. Bryol. 23: 36, plate 1, figs. 2, 3. 1896,.

Synonyms: Distichium inclinatum subsp. hagenii (H. Philibert) J. J. Amann Distichium inclinatum var. hagenii (H. Philibert) Mönkemeyer
Treatment appears in FNA Volume 27. Treatment on page 449. Mentioned on page 448.

Stems to ca. 2 cm, occasionally longer. Sexual condition paroicous or synoicous. Seta to 2 cm, straight to somewhat flexuose, smooth, red or reddish-brown, occasionally yellowish-brown. Capsule brown, 1–1.5 mm, inclined, ovoid to oblong-ovoid, becoming ± wrinkled when dry; operculum to 0.3 mm; peristome teeth 16, united below by a pale-yellow or hyaline membrane, the teeth in 8 groups of 2, irregularly split and perforated, smooth or very finely papillose. Spores finely papillose to roughened, 30–45 µm.


Phenology: Capsules mature late summer–fall.
Habitat: Usually calcareous soil, often in frost cushions
Elevation: low to high elevations

Distribution

Greenland, N.W.T., Nunavut, Alaska, n and Arctic Europe, e Asia (China), e Asia (Mongolia), Arctic Asia (Siberia)

Discussion

Distichium hagenii is a primarily high Arctic or high elevation species, morphologically close to D. inclinatum and sometimes considered as synonymous with that species. The primary difference is in the peristome. The 16 peristome teeth of D. hagenii are grouped in eight pairs united by a pale yellowish basal membrane, each tooth irregularly split and perforate. A report of the species from Newfoundland is referable to D. inclinatum (redetermined by G. R. Brassard according to H. A. Crum and L. E. Anderson 1981). In the southern part of the European range, it grows on sandy or loam soil close to the sea.

Selected References

None.

Lower Taxa

None.
... more about "Distichium hagenii"
forming a marginal border +  and not differentiated +
Rodney D. Seppelt +
H. Philibert +
oblong +, ovatelanceolate +  and whitish +
cucullate +
asymmetric +  and symmetric +
cleistocarpous +
ovoid +  and oblong-ovoid +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
subpercurrent +
1/4 width of leaf;1/3 width of leaf +
shortrectangular +  and isodiametric +
Greenland +, N.W.T. +, Nunavut +, Alaska +, n and Arctic Europe +, e Asia (China) +, e Asia (Mongolia) +  and Arctic Asia (Siberia) +
low to high elevations +
2 (?) +  and 8 (?) +
Usually calcareous soil, often in frost cushions +
linear-flexuose +
synoicous +, paroicous +, autoicous +, sexual +  and asexual +
quadrate +  and rectangular +
curved +  and straight +
subulate +, acuminate +  and lanceolate +
denticulate;plane +
hyaline +  and pale-yellow +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Capsules mature late summer–fall. +
filamentous +
Rev. Bryol. +
yellowish-brown;reddish-brown;red +
flexuose +  and straight to somewhat +
elongate +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
papillose +
globose;ovoid +
branched +  and simple +
synoicous +, paroicous +  and sexual +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Distichium inclinatum subsp. hagenii +  and Distichium inclinatum var. hagenii +
Distichium hagenii +
Distichium +
species +
specialized +
synoicous +, paroicous +, autoicous +, dioicous +  and sexual +
yellowish green +  and dark green +