(704.) T. rupestre, Kindb.
Plants intricate, caespitose, pale brownish-green, not glossy. Stems irregularly divided, branchlets short, filiform, not creeping. Leaves small, densely crowded, when dry appressed, open-erect when moistened, scarious and pellucid, not chlorophyllose nor papillose, subovate, acute or long-acuminate, the upper denticulate above, the borders recurved below, sometimes to the middle or above it; areolation in the lower leaves sub-linear above, looser at the base, in the upper leaves looser, oblong-linear, in all subquadrate at the borders and at the base; costa none.
This species is probably monoecious, but the male flowers are not distinctly evolute. Differs from the related Tripterocladium leucocla-dulum, C. Muell. (not correctly described by Lesq. & James), of which I possess original specimens, (given by the author, Dr. C. Mueller,) in the leaves being revolute at the borders to the middle, nearly entire or indistinctly denticulate, also in the narrower areolation and the outer perichetial leaves being blunt, the inner erect, not reflexed at the apex. (Kindberg.)
On the face of a cliff above the first tunnel at Yale, B.C., May 17tt 1889. (Macoun.)