Warnstorfia fluitans

(Hedwig) Loeske

Hedwigia 46: 310. 1907.

Illustrated
Basionym: Hypnum fluitans Hedwig Sp. Musc. Frond., 296. 1801 D. fluitans var. uncatus H. A. Crum Steere & L. E. Anderson
Synonyms: Drepanocladus berggrenii (Lange & C. E. O. Jensen) G. Roth D. fluitans (Hedwig) Warnstorf D. fluitans var. falcatus (C. E. O. Jensen) G. Roth D. fluitans var. setiformis (Renauld) Mönkemeyer Warnstorfia fluitans var. falcata (C. E. O. Jensen) H. A. Crum & L. E. Anderson
Treatment appears in FNA Volume 28. Treatment on page 396. Mentioned on page 13, 397, 398, 401.

Plants green, yellow-green, brownish, brown-red, or rarely clear red in extremely exposed habitats. Stems with axillary hair distal cells 1–4. Stem-leaves narrowly ovate to triangular-ovate, falcate or sometimes straight, concave or slightly so; margins denticulate, sometimes only in part or indistinctly; apex acuminate, not incurved; costa to 1/2–4/5 leaf length, occasionally double or shorter; alar region narrowly transversely triangular, supra-alar cells small, not forming region with alar cells.


Habitat: Mineral-poor acidic, sometimes nutrient-rich habitats, fens, bog pools, depressions in rock, rock with trickling water
Elevation: low to high elevations (0-3500 m)

Distribution

V28 622-distribution-map.gif

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Alaska, Colo., Conn., Maine, Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., Vt., Va., Wash., Wis., South America, Eurasia, s, e Africa, Atlantic Islands, Indian Ocean Islands (Kerguelen Islands), Pacific Islands (New Zealand), Pacific Islands (Papua New Guinea), Australia

Discussion

Warnstorfia fluitans is recognized by the somewhat indistinctly delimited transverse, more or less narrowly triangular alar regions in the stem leaves, and by the autoicous sexual condition. Warnstorfia pseudostraminea has alar regions that are sometimes transversely triangular (though more broadly so than in W. fluitans), but in some or most leaves the alar and large supra-alar cells together form an oval or rectangular region along the proximal leaf margins. Warnstorfia pseudostraminea has more or less straight to slightly falcate stem leaves, often with obtuse leaf apices having short cells, and the leaf apex is commonly hooked. However, neither of the last mentioned features are constant in W. pseudostraminea, and occasional (rare) specimens of W. fluitans have the same character states. Variety falcata (Drepanocladus fluitans var. uncatus) has been recognized, but because no type material seems to be extant, the status of this taxon cannot be evaluated.

Selected References

None.

Lower Taxa

None.

"shorter" is not a number.

... more about "Warnstorfia fluitans"
not separating +
not incurved +
acuminate +
Lars Hedenäs +
(Hedwig) Loeske +
short-decurrent +
curved +  and straight +
not decurrent +
Hypnum fluitans +  and D. fluitans var. uncatus +
cucullate +
cylindric +
inflated +, long-rectangular +  and quadrate +
differentiated +
0 +  and 1/2-4/5 +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Alaska +, Colo. +, Conn. +, Maine +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, Vt. +, Va. +, Wash. +, Wis. +, South America +, Eurasia +, s +, e Africa +, Atlantic Islands +, Indian Ocean Islands (Kerguelen Islands) +, Pacific Islands (New Zealand) +, Pacific Islands (Papua New Guinea) +  and Australia +
low to high elevations (0-3500 m) +
brownish +  and yellowbrown +
Mineral-poor acidic, sometimes nutrient-rich habitats, fens, bog pools, depressions in rock, rock with trickling water +
denticulate +
triangular +  and lanceolate +
obovate +, oblong +, ovate +  and lanceolate +
triangular +
Illustrated +
slightly;concave;falcate;narrowly ovate;triangular-ovate +
Drepanocladus berggrenii +, D. fluitans +, D. fluitans var. falcatus +, D. fluitans var. setiformis +  and Warnstorfia fluitans var. falcata +
Warnstorfia fluitans +
Warnstorfia +
species +
clear red +, brown-red +, brownish +, yellow-green +  and green +
transitional +