Ceratodon heterophyllus


Ottawa Naturalist 5: 179. 1892,.

Synonyms: Ceratodon purpureus var. obtusifolius Limpricht Ceratodon purpureus var. rotundifolius Berggren
Treatment appears in FNA Volume 27. Treatment on page 446. Mentioned on page 445.

Plants in dense tufts or mats, green to dark green to brownish green. Stems 0.3–1 cm. Leaves loosely imbricate, somewhat contorted when dry, ovate to ovate-lanceolate, concave and often somewhat cucullate, (0.35–)0.5–0.9(–1.5) mm, margins plane to weakly recurved, often only at mid-leaf, and entire to, rarely, weakly toothed distally, apices obtuse; most costae ending before apex; medial laminal cells (9–)12–16(–22) µm, thin-walled to somewhat thickened. Seta (0.9–)1.5(–2.5) cm, red. Capsule ovate-cylindric to, occasionally, ovate, (0.9–)1–1.2(–1.5) mm, strongly sulcate when dry; peristome segments free at their nodes, finely papillose, dark red with pale borders to, rarely, completely pale. Spores (18–)19–21(–22) µm.

Phenology: Capsules mature early summer–late fall.
Habitat: Sandy, usually moist soil, Arctic habitats
Elevation: low elevations (0-200 m)


V27 641-distribution-map.gif

Greenland, N.W.T., Yukon, Alaska, Eurasia.


In Northwest Territories, Ceratodon heterophyllus is found only on Prince Patrick Island.

Ceratodon heterophyllus has also been treated as C. purpureus forma heterophyllus (Kindberg) Britton, and R. R. Ireland (1980) considered it to be a variety of C. purpureus, but J. S. Burley and N. M. Pritchard (1990) provided ample evidence that it is a distinct species. The broadly ovate leaves of C. heterophyllus grade into some alpine variations of C. purpureus.

Lower Taxa

... more about "Ceratodon heterophyllus"
Terry T. McIntosh +
Kindberg +
Greenland +, N.W.T. +, Yukon +, Alaska +  and Eurasia. +
low elevations (0-200 m) +
Sandy, usually moist soil, Arctic habitats +
Capsules mature early summer–late fall. +
Ottawa Naturalist +
ireland1980a +
Ceratodon purpureus var. obtusifolius +  and Ceratodon purpureus var. rotundifolius +
Ceratodon heterophyllus +
Ceratodon +
species +