UEPA TTC.E. 47 



I. JUXGERMANXIACE^ (Scak Mosses). 



" Creeping moss-like plants, either with imbricated, very cellular leaves sur- 

 rounding a central axis, or with leaves and axis fused into a common leafy expansion, 

 i.e. either leafy or frondosc. Spore-cases 1, 2 or 4 valved, erect, with elaters." — 

 Liudley. 



By far the larger portion of the plants of this Order have distinct leaves of a 

 very moss-like character, though arranged on a different plan from those of mosses — 

 they arc also more delicate in texture and are lobed and cut into an endless variety 

 of forms, and are always nerveless. Their chief character, however, by which they 

 may be at once known from mosses, is the spore-case, which is globose, elevated on 

 an exceedingly delicate and translucent stalk, and, wlien ripe, bursts open into four 

 distinct and expanded valves, having its green spores mixed with separate elaters, 

 or double threaded spiral bodies which assist in their dispersion. 



A very much smaller portion has a frondose thallus (or simple leafy expansion) 

 and a single valved spore-case split on one side, or a 2-valved one, with a central 

 columella. 



The word Hepatica or Liverwort is really only applicable to those plants of this 

 group which have such a flat frondosc tliallus ; the name having been ap])lied, in 

 the first instance, I believe, to Marchantia polijmorpha, a common British plant of 

 just such a character, from a fancied resemblance, or supposed medicinal virtue. 



I. FOLIOS.!-:. 

 1. Zeaies succuhous.^ 



JUXGEEMAKNIA, LhmcCUS. 



J. (Plectocoita, Mitt.) polyekhiza, Hook. 

 J. ( Pi.ECTOcoLiA, Mitt.) Ariadne, Taylor. 

 J. (A-n'thelia, Dumont) hiktella, "Weber. 



Plagiocuila, Nces von Escnlccl:. 



r. XlPALEXSIS, Ldbg. 



P. FUUTicosA, Mitten. 



P. FLABKLLATA, Mitt. 



P. PARViroLiA, Ldbg. 



p. MICKODOXTA, Mitt. 



C. COAlITtlS, Nees. 



C. Auuuxus, Nees. 



CniLoscrrnos, Cvrda. 



1. Leaves fneuhoiis.^ 

 PliYsioTiVM, JVees von Esenlcck. 



p. srnAGXoinEs, Is^ees. 



P. ACI.XOSUM, Mitt. 



Sexdtseka, EiuUich'f. (Seuisma, Dumonl). 



S jrNEri:iii\A, Necs. 

 S. DieuANA, Taylor. 



Lepidozia, Xeea von Eunheeh. 

 L. ri.ExrosA, Mitt. 



Mastiooduvim, yees. (Bazz.ania, Gray). 



M. PRCEEirpujM, Nees. 

 M. TRiDEXs, Nces. 



M. CONCAVULA, Lind. 



' SHcc«io"s = imbricated in such a manner that the nppor edsje of each loaflct HHtfecliw that next 

 to it iu successioa. /hcm4u«5 = the upper edge of each oi'tclyiug that ne.\t to it. 



