Climacium americanum


Muscol. Recent., suppl. 2: 45. 1812

Selected by author to be illustrated
Synonyms: Climacium americanum subsp. kindbergii (Renauld & Cardot) Kindberg C. americanum var. kindbergii Renauld & Cardot C. americanum var. pseudokindbergii Cardot & Thériot C. kindbergii unknown
Treatment appears in FNA Volume 28. Treatment on page 511. Mentioned on page 509.
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Illustrator: Patricia M. Eckel
Plants sordid, yellow or yellow-green, dull when dry. Stem leaves with apex broadly to sharply acute, sometimes apiculate; laminal cells near insertion with walls thick, porose. Branch leaves with base sharply flexuose-auriculate; apex acute; medial laminal cells (2–)3–5(–7):1. Capsule long-cylindric, 3.5–6 mm.

Phenology: Capsules mature fall.
Habitat: Mesic or hydric microhabitats, along and in streams, margins of ponds and lakes, swamps, fens, seepages, upland depressions, mineral, sandy to clay soil
Elevation: low to high elevations


V28 795-distribution-map.gif

Nfld. and Labr. (Nfld.), N.S., Ont., Que., Ala., Alaska, Ark., Conn., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Miss., Mo., Mont., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., Wash., W.Va., Wis., Wyo., Asia (China).


In Climacium americanum, the basal angles of leaves may abruptly extend beyond the leaf outline into an auricle, usually delineated from the distal leaf outline by a short undulation and a shoulder, in addition to being sharply rounded into the insertion area. The capsules of C. americanum are very much larger than those of C. dendroides.

Climacium kindbergii, treated here as a synonym of C. americanum, has been distinguished by a prostrate or decumbent, not dendroid-erect, habit. This habit is apparently a response to inundation although there is molecular evidence that C. kindbergii is reproductively isolated from C. americanum (A. J. Shaw et al. 1987b, 1994, 2012). Given that any isolation will encourage molecular differences, this is not conclusive of distinction at the species level.

Lower Taxa

No lower taxa listed.

Facts about "Climacium americanum"
AuthorPatricia M. Eckel +
AuthorityBridel +
DistributionNfld. and Labr. (Nfld.) +, N.S. +, Ont. +, Que. +, Ala. +, Alaska +, Ark. +, Conn. +, Del. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, Mont. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. + and Asia (China). +
Elevationlow to high elevations +
HabitatMesic or hydric microhabitats, along and in streams, margins of ponds and lakes, swamps, fens, seepages, upland depressions, mineral, sandy to clay soil +
IllustratorPatricia M. Eckel +
PhenologyCapsules mature fall. +
Publication titleMuscol. Recent., suppl. +
Publication year1812 +
Referenceshaw1987b +
Source xml grained fna xml/V28/V28 795.xml +
Special statusSelected by author to be illustrated +
SynonymsClimacium americanum subsp. kindbergii +, C. americanum var. kindbergii +, C. americanum var. pseudokindbergii + and C. kindbergii +
Taxon familyClimaciaceae +
Taxon nameClimacium americanum +
Taxon parentClimacium +
Taxon rankspecies +
VolumeVolume 28 +