Coscinodon hartzii

C. E. O. Jensen

Meddel. Grønland 15: 422, figs. 1–8. 1897,.

Treatment appears in FNA Volume 27. Treatment on page 261. Mentioned on page 259, 262.

Plants 10–15 mm, pale olivaceous. Leaves oval to ovatelanceolate, 1.1–1.6 × 0.3–0.6 mm, margins incurved distally, apex plane, awn 0.1–0.6 mm, lamina 2-plicate, plications never extended to base; basal juxtacostal laminal cells short to long-rectangular, 21–55 × 9–12 µm, evenly thick-walled; basal marginal laminal cells quadrate to long-rectangular, 12–51 × 9–15 µm, thin or thick end walls and thin lateral walls; medial laminal cells 1-stratose; distal laminal cells 2–3-stratose. Sexual condition dioicous. Seta 1.5–1.8 mm. Capsule exserted, cylindrical; peristome present, cribrose, xerocastique.


Habitat: Shale, slate, and granitic rock in tundra
Elevation: moderate to high elevations (1000-1700 m)

Discussion

Coscinodon hartzii is endemic to arctic regions of North America. Until 1992, it was known only from its type locality at Scoresby Sound in eastern Greenland. B. M. Murray (1992) reported collections from Mt. Michelson and the Philip Smith Mountains of Alaska. W. C. Steere’s (1978) and J. Muñoz’s (1998c) citations of C. calyptratus from those sites have turned out to be C. hartzii. A new location in southeastern Yukon suggests that this species may be widespread across northern North America. Coscinodon hartzii is recognized by its weakly 2-plicate leaves coupled with an exserted capsule and cribrose peristome. It commonly also has 3-stratose regions in the distal parts of its stem leaves.

Selected References

None.

Lower Taxa

None.
... more about "Coscinodon hartzii"
deciduous +  and persistent +
differentiated +
Roxanne I. Hastings +
C. E. O. Jensen +
not papillose +
toothed +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
sinuous +  and straight to sometimes +
sinuose-nodulose;quadrate;elongate +
rectangular +
thick +, thin +, 9um +  and 15um +
divided +
undifferentiated +
plicate +  and smooth +
not papillose +
cucullate +  and campanulate +
sulcate +  and smooth +
striate +  and smooth +
cylindrical +
excurrent;percurrent;excurrent +
subpercurrent +
reniform +, elliptical +  and terete +
usually not markedly larger +
2-stratose +  and 1-stratose +
dioicous +  and sexual +
Greenland +, Yukon +  and Alaska. +
moderate to high elevations (1000-1700 m) +
reproduction +  and asexual +
dioicous +, autoicous +  and sexual +
Shale, slate, and granitic rock in tundra +
papillose +, mammillose +  and smooth +
9um (?) +  and 12um (?) +
specialized +
dioicous +, autoicous +  and sexual +
1.1mm;1.6mm +
oval +  and ovatelanceolate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
1;multistratose +
thick-walled +  and sinuose +
thick-walled +  and sinuose +
conic;rostrate +
not +  and differentiated +
lanceolate;linear +
Meddel. Grønland +
straight +
sigmoid +  and arcuate +
papillose +  and smooth +
short to long +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
ornamented +  and smooth +
globose +
Coscinodon hartzii +
Coscinodon +
species +
straight +