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BFNA | Family List | BFNA Vol. 2 | Hypnaceae | Platydictya

Platydictya confervoides (Bridel) H. A. Crum, Mich. Bot. 3: 60. 1964.

  • Amblystegiella conferva Jennings [illegitimate name]
  • Amblystegiella confervoides (Bridel) Loeske
  • Amblystegium confervoides (Bridel) Schimper
  • Amblystegium pseudoconfervoides Kindberg
  • Hypnum confervoides Bridel
  • Serpoleskea confervoides (Bridel) Loeske

    Plants in dull, dark green to yellow-brown, rather rigid mats; pseudoparaphyllia none. Leaves erect-appressed or rarely subsecund when dry, erect-spreading when moist, 0.15--0.3 mm, not much narrowed to the insertion, entire or nearly so; distal cells 2--3 (rarely 4):1, oblong-rhombic; alar cells subquadrate in small, inconspicuous groups of 3--6 cells, rarely more, at the basal margins. Specialized asexual reproduction absent. Sexual condition autoicous. Perichaetial leaves entire or obscurely serrulate above. Seta 6--8 mm. Capsule inclined to horizontal and asymmetric or rarely suberect, 0.8-- 1.2 mm, shortly oblong-cylindric, contracted below the mouth when dry; annulus of 2 layers of cells; operculum convex-conic, stoutly apiculate; stomata at base of the capsule; peristome teeth yellow-brown; cilia of endostome in 2's and 3's. Spores 11--13 ┬Ám.

    Moist, shaded limestone rocks, especially in stream valleys; low to moderate elevations; Nfld., N.S., Labrador, Ont., Que., Yukon; Alaska, Ala., Conn., Ill., Ind., Iowa, Kans., Md., Mich., Minn., Mo., N.J., N.Y., Ohio, Pa., S.Dak., Tenn., Vt., Va., Wis.; Europe; Asia (Caucasus).

    Diagnostic features of this species include the entire or obscurely serrulate leaf margins and short cells, as well as its rupestral habitat.


     

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