Polytrichastrum formosum var. formosum

Treatment appears in FNA Volume 27. Treatment on page 130. Mentioned on page 131.

Plants medium to large and robust. Stems 5–10 (–20) cm. Leaves 6–12 mm, subsquarrose and broadly spreading-recurved when moist; marginal lamina 2–5 cells wide, erect; lamellae 5–7 cells high, entire, the marginal cells rounded and ± thick-walled. Sexual condition dioicous. Capsule short rectangular, yellowish to brownish; hypophysis cylindric, delimited by a shallow groove; peristome teeth 64, very regular in form.


Habitat: Low to moderate elevations (0-500 m)

Distribution

V27 158-distribution-map.gif

B.C., N.B., Ont., Alaska, Wash., Europe, sw Asia (Caucasus Mountains), sw Asia (s Russia), sw Asia (Turkey), n Africa (Algeria), Atlantic Islands (Iceland), Atlantic Islands (Macaronesia)

Discussion

Variety formosum is rare in North America, and its distribution and ecology poorly documented. It may possibly be an introduction, like Atrichum undulatum, another common European species believed to be introduced here.

Selected References

None.

Lower Taxa

None.

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

prominent +
Gary L. Smith Merrill +
(Hedwig) G. L. Smith +
toothed +
differentiated +
Polytrichum formosum +
distinct +
lanceolate +  and linear +
broadened +
not pitted +  and papillose +
polygamous +, dioicous +  and sexual +
sparsely ciliate;smooth +
cucullate +
yellowish +  and brownish +
horizontal;inclined to almost +
rectangular +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
prolonged +
toothed +
undifferentiated +
B.C. +, N.B. +, Ont. +, Alaska +, Wash. +, Europe +, sw Asia (Caucasus Mountains) +, sw Asia (s Russia) +, sw Asia (Turkey) +, n Africa (Algeria) +, Atlantic Islands (Iceland) +  and Atlantic Islands (Macaronesia) +
scabrous +, mammillose +  and smooth +
Low to moderate elevations (0-500 m) +
differentiated +
photosynthetic +
5 +  and 7 +
serrate +, crenulate +  and serrulate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
membranous +
1(-3)-stratose +
less entire;finely serrulate +
papillose +  and smooth +
crenulate +  and serrulate +
shape +  and size +
somewhat taller +
dioicous +  and sexual +
sharply toothed +  and entire +
interwoven +
600 cm6,000 mm <br />6 m <br /> (?) +
toothed +
toothlike +
Mem. New York Bot. Gard. +
underground +
undifferentiated +
rounded +  and narrowly elliptic +
yellowish +  and reddish-brown +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
hyaline-margined +
rectangular +
tapering;ovate;elliptic +
differentiated +
larger +  and minute +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Polytrichum attenuatum +
Polytrichastrum formosum var. formosum +
Polytrichastrum formosum +
variety +
pale +  and brownish +
unjointed +
not keeled +
green +  and dark olive green +
medium +  and large +