Polytrichaceae – Hair Cap Moss Family

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POLYTRICHACEAE – HAIR CAP MOSS FAMILY Plant: moss (tend to be larger and more noticeable than most mosses) Stem: mostly erect Root: rhizoids (no root) Leaves: mostly narrowly lanceolate (although quite variable), spirally arranged on stem, lamellae along leaf nerves, often with toothed leaf margins, leaves sharp pointed, most have a hyaline basal sheath Flowers: dioecious; gametophyte (leafy) with sporophyte born at tip of gametophyte (gametophyte generation dimorphic); sporophtyte – setea often long and solitary, capsule 2 to 6 angled (shape variable), calyptra usually of matted or felted hair, single row of (16?) 32 or 64 teeth on peristome Fruit: Other: forms mats or patches; common throughout NA and CAN (not found in some southwest states); prefers acidic conditions Genera: 22+ genera *** species descriptions are general - for full ID see professional texts for full descriptions (sometimes microscopic details are necessary) WARNING – family descriptions are only a layman’s guide and should not be used as definitive POLYTRICHACEAE – HAIR CAP MOSS FAMILY Common Hair Cap [Polytrichum] Moss; Polytrichum commune Hedw. A Polytrichum (Hair Cap) Moss; Polytrichum piliferum Hedw. Common Hair Cap [Polytrichum] Moss Polytrichum commune Hedw. Polytrichaceae (Hair Cap Moss Family) Oak Openings Metropark, Lucas County, Ohio Notes: antheridia (male) rossettes greenish yellow; seta yellowish brown to red, calyptra of yellowish to brownish hair, capsule rectangular to somewhat cubic; leaves erect to spreading, tips recurved, finely toothed from base to tip, large clasping sheath, awn short; plants medium to tall, in mats or clumps in moist areas; most of NA and CAN except some southwestern states ; spring [V Max Brown, 2009] A Polytrichum (Hair Cap) Moss Polytrichum piliferum Hedw. Polytrichaceae (Hair Cap Moss Family) Oak Openings Metropark, Lucas County, Ohio Notes: antheridia (male) rossettes red resembling flowers; seta dark red, calyptra of white to light brown hair, capsule somewhat cubic; leaves erect to in-curved, linear lanceolate, smooth, thick and turgid, tipped by a long hyaline awn; plants small to medium, in mats or clumps, in well drained areas; most of NA and CAN except some southern states; spring [V Max Brown, 2009].

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