Catoscopium nigritum

(Hedwig) Bridel
Bryol. Univ. 1: 368. 1826.
Basionyms: Weissia nigrita Hedwig Sp. Musc. Frond., 72. 1801
Treatment appears in FNA Volume 28. Treatment on page 35. Mentioned on page 36.

Plants to 6 cm. Stem leaves erect-spreading, 3-ranked, flexuose when dry, 0.8–1.5 mm; basal laminal cells oblong to elongate; distal cells quadrate to short-rectangular. Perichaetial leaves somewhat larger than stem leaves. Seta 0.8–2.4 cm. Capsule 0.6–1 mm; exostome teeth lanceolate, incurved, truncate. Spores 33–48 µm.

Phenology: Capsules mature summer.
Habitat: Edges of pools in calcareous rich fens
Elevation: low elevations


V28 40-distribution-map.gif

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Calif., Ind., Iowa, Mich., Minn., Mont., N.Y., Europe, Asia, Atlantic Islands (Iceland).


Catoscopium nigritum is characterized by its dense turfs of reddish black stems with erect, lanceolate leaves. When fertile, the small, shiny, black capsules with small mouth, reduced peristome, and inclined posture clearly define the species.

Selected References


Lower Taxa


... more about "Catoscopium nigritum"
Dale H. Vitt +
(Hedwig) Bridel +
Weissia nigrita +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Ind. +, Iowa +, Mich. +, Minn. +, Mont. +, N.Y. +, Europe +, Asia +  and Atlantic Islands (Iceland). +
low elevations +
Edges of pools in calcareous rich fens +
Capsules mature summer. +
Bryol. Univ. +
Illustrated +
Catoscopium nigritum +
Catoscopium +
species +