nostoc, no stock

[Ger. nostok, nostoch= nostoc.] (See def.) Bot .: The typical genus of the sub-order or order Nos to chinese or Nostochese, or Nos to chaceæ. The definitely-formed hard pellicle of the rind inclosing the frond is composed of a gelatinous substance, globose, lobed or forked, imbedded in which are numerous more or le beaded filaments, or neck lace-like lines of globules, some of which are larger than the rest. Reproduction is by cell division of the end och rome of these larger cells, or by zoospores. The species are generally green, though sometimes blue. They are found on damp ground, wet rocks, mo es, ., and in fresh water, either free or attached to stones. According to Fries, N. lichenoides and foliaceum are the lichens Collema limosum , C. flaccidum, ., surcharged with water.