Trematodon longicollis
Trematodon brevicollis
long-neck moss, trematodon moss
trematodon moss
ovate-lanceolate to long-subulate from an ovate or obovate base, serrulate at apex;
costa percurrent or ending before the apex.
ovate-lanceolate to short-subulate from an ovate or obovate base, entire at apex;
costa percurrent or subpercurrent.
long, 10–30 mm.
short, 4–6 mm.
inclined, curved;
neck 2–3 times as long as urn when dry, long-cylindric, strumose at base;
peristome teeth 2-fid or irregularly perforate, not fragile, commonly persistent;
annulus compound, revoluble.
not or little inclined, slightly curved;
neck equaling the urn in length, cylindric or obovate, not strumose but tapering instead;
peristome teeth entire or perforate near apex, not fragile, commonly persistent;
annulus compound, revoluble.
Trematodon longicollis
Trematodon brevicollis
Trematodon longicollis is much like T. ambiguus but differs in the relative lengths of capsule urn and neck when dry, and is clearly more southern in distribution. The peristome may occasionally adhere to the operculum on dehiscence and the capsule may then falsely appear gymnostomous.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
I. A. Worley and Z. Iwatsuki (1970) reported both Trematodon brevicollis and T. ambiguus from Alaska.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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