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controverial weissia moss, green-cushion weissia moss, green-tuft stubble-moss, pigtail moss


short- to long-lanceolate, base weakly differentiated to ovate, shoulders weak or absent, distal laminal margins strongly and usually but not always sharply incurved or inrolled, apex plane to channeled, acute, mucro usually weak, of 1–5(–8) cells;

costal adaxial stereid band smaller than the abaxial;

distal laminal cells 6–13 µm wide.


elongate, 0.3–0.8 cm.

Sexual condition



stegocarpic, long-ovate to cylindric, operculum differentiated, falling, peristome present, teeth rudimentary to lanceolate, or occasionally absent.

Weissia controversa

Phenology Capsules mature throughout year depending on area of the flora.
Habitat Weedy, soil, rock, disturbed areas, roadsides, fields, acid or calcareous substrates

This treatment of Weissia controversa follows the study of A. Stoneburner (1985), which justifiably included W. andrewsii, and, agreeing with H. A. Crum and L. E. Anderson (1981), pointed out the great variation in peristome development including occurrence of both eperistomate and peristomate capsules in the same collection. The present treatment includes all flora area reports of W. condensa, a morphologically distinct European species with characters as listed in Excluded Species. Rhizoidal gemmae were reported by W. D. Reese (1988) but these are apparently rare. Weissia viridula Bridel is an illegitimate name that has been much used for this taxon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

from FNA
AK; AL; AZ; CA; CO; FL; GA; IA; ID; IL; KS; KY; LA; MA; MI; MT; NC; NH; NJ; NM; NV; NY; OH; OK; OR; TN; TX; UT; VA; WA; WI; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT; Mexico; Central America; South America; Africa; Pacific Islands; Greenland; Eurasia; West Indies; Australia
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Parent taxa Pottiaceae > subfam. Trichostomoideae > Weissia
Sibling taxa
W. brachycarpa, W. inoperculata, W. jamaicensis, W. ligulifolia, W. ludoviciana, W. muhlenbergiana, W. occidentalis, W. phascopsis, W. sharpii
Synonyms Gymnostomum rauanum, Mollia viridula, W. andrewsii, W. brandegeei, W. controversa var. australis, W. controversa var. longiseta, W. controversa var. wolffii, W. curvicaulis, W. longiseta, W. microodonta, W. viridula var. nitida, W. wolfii
Name authority Hedwig: Sp. Musc. Frond., 67. (1801)
Source Flora of North America vol. 27, p. 514.
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