�y��vlog

Perigynium obconic or obovoid, squarrose in exceedingly dense short spikes.—Sp.

Creeping, widely subpinnately branching; leaves imbricate, spreading, rounded, the lower lobe obtuse or acute; monœcious; perianth obconic, compressed, the mouth entire, truncate; antheridia in the bases of 2–3 pairs of strongly imbricate tumid leaves.—On rocks aud roots of trees; common.

Involucral leaves 2–6, the outer smaller, the inner variously cut; perianth small, obconic or campanulate, 3-angled and 3-lobed only at the apex, the lobes usually spinose.

Prostrate, horizontally branched, copiously rooting; leaves imbricate, horizontal, oval, entire or slightly repand; underleaves lanceolate; perianth terminal, broadly obconic, the mouth compressed, repand-crenulate.

Involucres sessile, obconic or pyriform, perforated at the apex, continuous with the thallus at base.