Species name referring to the leaf form where the upper portion bends outward and downward at right angles to the body of the leaf.
This is one of the most frequent lawn pests in cities and towns near the coast; its growth is enhanced through late-season lawn mowing and fertilization, since it grows during the wet winter when the grass is dormant.
The strongly and regularly squarrose leaves of the frequently erect main stems serve as useful characters. In open sites, branching is very irregular. Often plants in lawns or on stabilized dunes form turf-like carpets of erect plants.
Forming loose mats of suberect shoots with strongly squarrose leaves, giving the shoot apex a star-like appearance when viewed from above; light green in colour with a tinge of red brown, especially in open areas.
R. squarrosus is occasionally difficult to separate from R. loreus. R. squarrosus, however, regularly has squarrose leaves on the main stem and pleats are lacking or obscure in the leaves. R. squarrosus never possesses falcate-secund leaves at the main stem apex and is usually in open sites.
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: Some Common Mosses of BC
Synonyms and Alternate Names:
Rhytidiadelphus calvescens (Kindb.) Broth.
Rhytidiadelphus squarrosus var. calvescens (Kindb.) Warnst.