Plant Guide > Mosses and Lichens > Mosses > Genus Gymnostomum > Gymnostomum Calcareum Moss

Gymnostomum Calcareum Moss

Gymnostomum Calcareum MossHabit and habitat.-Densely tufted, bright-green above, rusty below ; on shaded limestone rocks.

Name.-From calcarius, pertaining to lime, a name suggested by the plant's habit of depositing lime.

Plants (gametophyte). -Stems 1/4 to 3/4 of an inch long, covered with rootlets.

Leaves.-The lower very small, gradually or abruptly larger upward ; slender lance-shaped ; apex blunt ; vein extending to near the apex ; margin minutely blunt-toothed.

Habit of flowering.-Male and female flowers on separate plants (dioicous).

Veil (calyptra).-Split up one side.

Spore-case.-Exserted, oblong, yellow-brown, slightly constricted under the mouth when dry.

Pedicel.- 1/6 to 2/6 of an inch long.

Lid (operculum).-Base conical ; beak awl-like.

Teeth (peristome).-None.

Annulus.-Short and persistent.

Spores.-Rare, mature in summer.