Tetraplodon angustatus

(Hedwig) Bruch & Schimper

Bryol. Europ. 3: 214. 1844.

Basionym: Splachnum angustatum Hedwig Sp. Musc. Frond., 51. 1801
Synonyms: S. setaceum Michaux
Treatment appears in FNA Volume 28. Treatment on page 22. Mentioned on page 21, 23.
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Plants 2–8 cm, yellow-green to brown. Leaves long-lanceolate, concave, 3–4 × 0.5 mm; margins with large teeth or occasionally entire; apex slenderly long-acuminate; costa nearly filling subula; distal laminal cells rectangular or oblong-hexagonal, 20 × 30 µm. Sexual condition autoicous or dioicous. Seta brownish, 0.2–0.4 cm. Capsule stegocarpous, brown, dark-brown with age, ovate-cylindric; hypophysis wider than urn; stomata in distal hypophysis; operculum hemispheric or bluntly conic. Calyptra conic-mitrate. Spores 9–10 µm, smooth.


Phenology: Capsules mature summer.
Habitat: Dung of carnivores, old bones, owl pellets, dry boreal habitats
Elevation: low to high elevations

Distribution

V28 14-distribution-map.gif

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., Que., Sask., Yukon, Alaska, Maine, Mich., Minn., Mont., N.H., N.Y., n, c Europe, Asia (China), Asia (Japan), Asia (Siberia)

Discussion

Tetraplodon angustatus, like T. mnioides, is mainly boreal in distribution and occurs on similar substrates; it is easily distinguished from T. mnioides by lanceolate-acuminate, irregularly serrate leaves that narrow to a slender, elongate acumen, shorter seta, and green (brown with age) hypophysis. In Alberta, sporophytes mature in spring prior to the maturation of T. mnioides sporophytes, resulting in the temporal separation of spores of these two species on fresh droppings and thus the physical separation of T. angustatus and T. mnioides on droppings where these two species occur together regionally.

Selected References

None.

Lower Taxa

None.
... more about "Tetraplodon angustatus"
long-acuminate +
Paul C. Marino +
(Hedwig) Bruch & Schimper +
Splachnum angustatum +
conic-mitrate +
not constricted +  and small +
dark-brown;brown +
stegocarpous +
ovate-cylindric +
dioicous +, autoicous +  and sexual +
oblong-hexagonal +, hexagonal +  and rectangular +
dioicous +, autoicous +  and sexual +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Maine +, Mich. +, Minn. +, Mont. +, N.H. +, N.Y. +, n +, c Europe +, Asia (China) +, Asia (Japan) +  and Asia (Siberia) +
low to high elevations +
inflexed +  and reflexed +
4 +  and 2 +
Dung of carnivores, old bones, owl pellets, dry boreal habitats +
short +  and elongate +
0.3 cm3 mm <br />0.003 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
concave +  and long-lanceolate +
0.5 cm5 mm <br />0.005 m <br /> (?) +
entire +  and toothed +
elongate +
conic +  and hemispheric +
Capsules mature summer. +
rectangular +  and elongate +
Bryol. Europ. +
not twisted +
elongate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
thick +  and thin +
acuminate +, obovate +  and oblong-lanceolate +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
S. setaceum +
Tetraplodon angustatus +
Tetraplodon +
species +
yellow-green +  and brown +
small;medium-sized +