found on rocks the patches are often of much greater extent,
spreading over the surface for many feet, when the plant may
be compared to pieces of rough, dark-green plush. There is
always a peculiarly rigid, harsh feel by which this plant may
be distinguished from C. scopulorutn. . From C. pannosa it differs
in its shorter filaments, and the more tooth-like bundles into
which tliey are aggregated.
Pig. 1. Patch of Ca l o t h e ix h y d n o id e s :
fascicles, from the same:— sligUhj
apices of the same:— more
■the natural size. 3. Tooth-like
3 and 4. Pilaments, and
