Ditrichum montanum

Leiberg

Bull. Torrey Bot. Club 20: 112, plate 143. 1893,.

Treatment appears in FNA Volume 27. Treatment on page 454. Mentioned on page 451, 455.

Plants usually in tufts, green. Stems erect, to 2 cm, fastigiately branched from near base, dichotomous distally. Leaves spreading when moist, erect and somewhat contorted when dry, linear-lanceolate, lamina 1-stratose except on margins; margins plane proximally, erect to slightly incurved distally, 2-stratose and subserrulate distally, the apex blunt and coarsely toothed; costa broad, strong, ceasing shortly just proximal to the apex, in section with strong abaxial and weak adaxial stereid bands; lamina cells thick-walled, rectangular proximally, becoming ± quadrate distally. Specialized asexual reproduction unknown. Sexual condition autoicous; perigonia terminal on short basal or axillary branches; exterior perichaetial leaves similar to stem-leaves, the inner broadly sheathing. Seta pale-yellow, to 2.5 cm, erect. Capsule straight and erect or slightly curved, orangebrown, dark reddish-brown at the mouth, elliptical, narrowed at the mouth, 2–3 mm, flattened and weakly sulcate when dry; operculum conic-rostrate, to 1 mm; peristome 600–800 µm, often broken, the teeth split to the short basal membrane, spiculose-papillose. Spores 8–10 µm, appearing smooth.


Phenology: Capsules mature summer (Jul–Aug).
Habitat: Soil, montane habitats
Elevation: moderate to high elevations (800-1600 m)

Distribution

V27 656-distribution-map.gif

Alta., B.C., Idaho, Oreg., Wash.

Discussion

Ditrichum montanum is apparently confined to upland habitats on disturbed soil. It is distinguished from D. heteromallum by the short, more or less quadrate cells in the distal part of the leaf and by the pale, yellowish seta. Elevation data are from E. Lawton (1971).

Selected References

None.

Lower Taxa

None.

"um" is not declared as a valid unit of measurement for this property.

... more about "Ditrichum montanum"
forming a marginal border +  and not differentiated +
Rodney D. Seppelt +, Robert R. Ireland Jr. +  and Harold Robinson +
Leiberg +
cucullate +
dark reddish-brown;orangebrown +
curved +  and straight +
cleistocarpous +
flattened +  and narrowed +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
excurrent;percurrent +
shortrectangular +  and isodiametric +
Alta. +, B.C. +, Idaho +, Oreg. +  and Wash. +
moderate to high elevations (800-1600 m) +
Soil, montane habitats +
papillose +  and smooth +
autoicous +, sexual +  and asexual +
quadrate +  and rectangular +
flexuose +
linear-lanceolate +
subserrulate +  and 2-stratose +
erect +  and slightly incurved +
conic-rostrate +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
with a longer , broader sheathing base +  and differentiated +
on short branches +  and axillary +
Capsules mature summer (Jul–Aug). +
filamentous +
Bull. Torrey Bot. Club +
pale-yellow +
flexuose +
elongate +
0 cm0 mm <br />0 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
papillose +
globose +
dichotomous +  and branched +
reaching 2 cm +  and short +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Ditrichum montanum +
Ditrichum +
species +
spiculose-papillose +
specialized +
synoicous +, paroicous +, autoicous +, dioicous +  and sexual +
small +  and medium-sized +