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Published In: Naturhistorische Reise durch einen Theil Schwedens 121–122. 1804. (Naturh. Reise Schweden) Name publication detail

Project Name Data (Last Modified On 3/7/2011)
Acceptance : Accepted
Project data     (Last Modified On 3/7/2011)

There are seven species of Conostomum (Frahm et al. 1996a), all of which occur in the Southern Hemisphere with six restricted to that region. It is a genus of small plants with smooth rhizoids and narrow, erect-appressed leaves that are borne in five spiral rows. The Conostomum sporophyte has a conic-rostrate operculum, and when a peristome is present it consists of one row of narrow teeth that are united at the tips. Conostomum is related to the  Bartramiaceae by its glaucous color, stems with a hyalodermis and well-developed central stand, upper leaf cells (in some species) papillose by projecting end-walls, furrowed capsules, and reniform, coarsely papillose spores. The genus was revised by Frahm et al. (1996a).  


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Conostomum Sw. ex Web. & Mohr, Naturh. Reise Schwedens 122. 1804.

Plants small, in dense tufts, green to glaucous-green above, red-brown below. Stems simple or irregularly branched, hyalodermis and central strand present; rhizoids reddish, brown, smooth. Leaves imbricate, appressed in 5 distinct, spiral rows when dry, erect-appressed when wet, lanceolate, not plicate; apices acuminate; margins plane or revolute, smooth or sharply serrate above; costae subpercurrent or excurrent; upper cells smooth or papillose from the upper cell ends, rhomboidal, short-rectangular to rectangular, alar cells undifferentiated or enlarged, bulging quadrate in small groups at extreme basal angles. Autoicous or dioicous. Setae short, straight or curved. Capsules cleistocarpous or stegocarpous, exserted, oval to globose or subglobose, wrinkled to furrowed when dry; opercula conic-rostrate; peristome absent or single, with 16 short, narrowly triangular teeth united at tips. Spores reniform, smooth or coarsely papillose. Calyptrae cucullate.

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