Orthotrichum pylaisii

Bridel

Bryol. Univ. 1: 722. 1826.

Synonyms: Orthotrichum arcticum Schimper O. arcticum subsp. blyttii (Schimper) Kindberg O. arcticum var. groenlandicum (Berggren) Mönkemeyer O. blyttii Cardot & Thériot O. blyttii subsp. arcticum (Schimper) Macoun O. blyttii var. arcticum (Schimper) I. Hagen O. blyttii var. groenlandicum (Berggren) C. E. O. Jensen O. blyttii subsp. microblephare (Schimper) Macoun O. blyttii var. microblephare (Schimper) C. E. O. Jensen O. groenlandicum O. idaohense O. pylaisii subsp. arcticum (Schimper) Kindberg O. pylaisii subsp. groenlandicum (Berggren) Kindberg O. pylaisii subsp. microblephare (Schimper) Kindberg O. rhabdophorum
Treatment appears in FNA Volume 28. Treatment on page 64. Mentioned on page 46, 58, 65.

Plants to 3 cm, light green to olive green. Stem leaves stiff, erect-appressed when dry, ovate-lanceolate to lanceolate, 2–3 mm; margins revolute, entire; apex broadly acute to narrowly obtuse, often bluntly acuminate; basal laminal cells rectangular-elongate, walls thick, ± nodose; distal cells 9–16 µm, 1-stratose, papillae 1–4 per cell, 2-fid, small. Specialized asexual reproduction absent. Sexual condition gonioautoicous. Seta 2–3 mm. Capsule emergent or exserted, oblong to cylindric, 1.2–2.5 mm, slightly 8-ribbed distally; exothecial cells differentiated to mid capsule; stomata superficial; peristome double or single; prostome occasionally present, small; exostome teeth 16, sometimes connate in 8 pairs, reflexed-recurved, densely papillose, not fenestrate, not cancellate; endostome segments often absent, occasionally rudimentary, or 8, well developed, usually present in at least some capsules, narrow, of 1 row of cells, smooth or finely papillose. Calyptra oblong to oblong-conic, smooth, sparsely hairy, hairs smooth. Spores 16–27 µm.


Habitat: Rock near oceans or alpine or arctic zones, on Salix or Alnus, bone, in or near bird rookeries, granitic boulders in coniferous forests
Elevation: low to high elevations (100- 3000 m)

Distribution

V28 93-distribution-map.gif

Greenland, Alta., B.C., Man., Nfld. and Labr., N.W.T., Nunavut, Que., Yukon, Alaska, Calif., Idaho, Mont., Wash., Wyo., n Europe, n Asia.

Discussion

Orthotrichum pylaisii is distinguished by the ribbed capsules with reflexed exostome teeth and a rudimentary endostome, along with superficial stomata and large, ovate-lanceolate leaves. The capsule is usually exserted in North American populations; however, in European populations it is sometimes only emergent.

Selected References

None.

Lower Taxa

None.
... more about "Orthotrichum pylaisii"
Dale H. Vitt +
Bridel +
Greenland +, Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Que. +, Yukon +, Alaska +, Calif. +, Idaho +, Mont. +, Wash. +, Wyo. +, n Europe +  and n Asia. +
low to high elevations (100- 3000 m) +
Rock near oceans or alpine or arctic zones, on Salix or Alnus, bone, in or near bird rookeries, granitic boulders in coniferous forests +
Bryol. Univ. +
Orthotrichum arcticum +, O. arcticum subsp. blyttii +, O. arcticum var. groenlandicum +, O. blyttii +, O. blyttii subsp. arcticum +, O. blyttii var. arcticum +, O. blyttii var. groenlandicum +, O. blyttii subsp. microblephare +, O. blyttii var. microblephare +, O. groenlandicum +, O. idaohense +, O. pylaisii subsp. arcticum +, O. pylaisii subsp. groenlandicum +, O. pylaisii subsp. microblephare +  and O. rhabdophorum +
Orthotrichum pylaisii +
Orthotrichum +
species +