Dicranum majus var. orthophyllum

A. Braun ex Milde

Bryol. Siles., 71. 1869,.

Treatment appears in FNA Volume 27. Treatment on page 406. Mentioned on page 405.

Plants in loose tufts, mostly light green, somewhat dull. Leaves erect-patent, 6–8 mm; margins slightly serrulate distally to almost entire; costa serrulate to nearly smooth distally on abaxial surface, with an interrupted double row of guide cells.


Phenology: Capsules mature spring.
Habitat: Humus, sand, and rock in the tundra
Elevation: 40-1500 m

Distribution

V27 574-distribution-map.gif

B.C., Man., N.W.T., Que., Yukon, Alaska, Europe

Discussion

I. A. Worley and Z. Iwatsuki (1970) recorded var. orthophyllum from Alaska. It is an extremely weak Arctic variety that differs from var. majus in only a few minor characters. The plants immediately appear different because of the erect-patent, short leaves instead of the long, falcate-secund leaves of var. majus. More collections are needed from many Arctic localities to better understand var. orthophyllum, which may only be an environmental form.

Selected References

None.

Lower Taxa

None.

persistent +  and deciduous +
differentiated +
falcate-secund +
1.15 cm11.5 mm <br />0.0115 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
straight +
0.8 cm8 mm <br />0.008 m <br /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
1mm +  and 2mm +
Robert R. Ireland Jr. +
A. Braun ex Milde +
short to long +
differentiated +
1.15 cm11.5 mm <br />0.0115 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
concave +, ovatelanceolate +  and lanceolate +
1mm +  and 2mm +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
flagelliform +  and terete +
reproduction +  and asexual +
cucullate +
yellowish-brown +  and dark-brown +
arcuate +  and straight +
inclined +  and horizontal +
smooth +  and faintly striate +
cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
multistratose +  and 2-stratose +
generally orange +  and brown +
specialized +
papillose +  and mammillose +
pseudomonoicous +, dioicous +  and sexual +
inflated +
well-differentiated +  and differentiated +
serrulate;nearly smooth +
1/12 +  and 1/7 +
toothed +
toothed +
pseudomonoicous +  and sexual +
spreading +, erect-patent +  and erect-appressed +
smooth +  and rugose +
B.C. +, Man. +, N.W.T. +, Que. +, Yukon +, Alaska +  and Europe +
reddish-brown +  and pitted-striolate +
40-1500 m +
Humus, sand, and rock in the tundra +
with few 2-stratose regions +  and 1-stratose +
enlarged +
falcate-secund +
papillose +, mammillose +, nonpitted +  and pitted +
straight +  and flexuose +
acuminate +, ovate +  and lanceolate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
entire +  and serrulate +
arcuate +  and straight +
long-rostrate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
nonpitted +  and pitted +
toothed +  and forked +
short-acuminate +, concave +  and ovate +
pitted-striolate +
16 +  and single +
papillose +  and striolate +
Capsules mature spring. +
undifferentiated +
Bryol. Siles., +
smooth +  and papillose +
1 +  and 2 +
interrupted +
well-developed +
yellow;light-brown +
flexuose +  and straight +
2 +  and 5 +
elongate +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1/3 +  and 1/2 +
spherical +
with a few whitish rhizoids;naked +
3 cm30 mm <br />0.03 m <br /> (16 cm160 mm <br />0.16 m <br />) +
superficial +
Dicranum majus var. orthophyllum +
Dicranum majus +
variety +
deciduous +
lanceolate +