Pl-ATE LI. R. 



THE COMMON ADDER'S TONGUE, 

 (Opihoglossum vulgatum). 



OPHIOGLOSSUM, lAtmau*. 



Clutter* of Spore*cam naked, arranged in a simple distichous spike, forming a con- 

 tracted branch of the frond. Spore-caw unisonal along each margin of the 

 compressed spike, leathery, without reticulations, horizontal, globose, but sunk 

 in or connate with the spike, opening in two valves transversely lo the axis. 

 Veins (ecostnte in British species), uniform, reticulated in elongated hexagonoid 

 areolcs. with or without free included mnleU. 



0. vulgatum; fronds usually solitary ; barren branch ovate obtuse; fertile branch 

 linear. 



OMilG0u>wrjj TflbUTUlf, £i««™, Qttk* Ptanfarmm, WIS, Mm, FiHot* EriU*nie+ t 2,1.3. &vtra, 

 IfytM lioiomy K. 1. 103 ; £*$tti& Fkra t fr. iHO. Mattay, J>fcr* IliUr***, 3IG. Hooker ami Arnott, 



UritUl Flora, 37$. Ralimot&a, Jf.ujn.iJ // ltritUX Itototy, 117. XttOMon, I littery of Unfit* l*r*i, 32o\ 



Zfodfo, FUfiyropkia Jiritenuico, fr. 33, Jfcort, Hamdbooi: of liritU\ />r*#, 218. Somty. Femw +f 

 GrtaJ UriUim, £1,1.40, /fWvr, Flora MMm, fr B t 7fl; <?***« JWfaw, *. W> ii, Gray, Stturot 

 Arr***eM**t of Itritul Mrjfr, iL 20. 6VUwi*\ Kryptoyxmiotk* Qowcho*. 153, t JOB. IFT/Wrjwr, 

 Sffci/4 PiotUormm, r. GH. tyrm*** Sytlov** ftyrtolitiiu*, it. 22. JVrrf, ,%</fri^r*tm TtttomUt* 



FlrriJ#yr4fAi<t t 40. 



OrmonLoinru otatcw. &t/u4*ry, /VooToMiif, dOI. 



Oriuonioww Brain, ■ //ft, Ap. IW. KM," acrailing to ProaL 



Ofmiwiloshiw ikuouum, GiUUrt, "Am PJyM. ii. to*.*' 



EXPLANATION OF THE PLATE. 



run I.I. it.-Ol'nioai*wu tcLfliTVit; I, fan Warrington, huictiiriiiro; T.Q.Jtyl*mJ*: 2. fi\>»n KtoUr, Dcvotrthir*; 

 J?. X ft™/.- a. O. tiuutih uifor, from Sunubii-Ur, Orkney; J. T* Sym*. 



IIAHITAT.— Tin Common Adder** Tongue U in England a »id<*lr.di»jHrtcd pUnt, and generally abnnlwt vrbcrc it occur*. 

 T1 r lituMion* ia *hkh it ii found art nwlrt loamy parfuroa and meadow land. It teem* Iota common hi Wal«, it 

 well iu in SootUml mi] Inland, but eittnd* northward to Orlcooy and Shetland, ia the farmer of which Irlaadu 

 Mr. J. T. Sym© hoi found a loull rarioty, fructifying in autumn, Kctr ttuh habitat, nr© nw»nK but it b Jbuiu] 

 in tlio widcly-^paratrd countin of Antrim. Galway, Dublin, and Cork. AJr. WaUon glrc* CO0 fort a* the probable 

 limit of iU altitude above the kh torcl, 



GEOGRAPHICAL DJSTB1BL'TH).\\-TU* -f«ie» » dupnwl owi nearly ih« nfcoV of Europp, from the north of BqmIi 

 toTuvouiy, and lfcuma* In Ania it occun id ibo En*t Iridic*; m TniiHa, and tbe Caucojua (//i. JIvaler) ; iuSiU'ria, 

 in the Ural r^ioo, And in the iOand of Un*Iat<hta> It ia aI»o mot *ilh in rariorn part* <»f Xortb AttttitAj In iTwkot 

 and in Ni w /^IsmI (//A. i/toCrr). The O. rottottn* and ft e/oa^ifw of Now Zealand. Xcw JloUand, and the Capo 

 of Good Hope appear to bo very doubtfully dintinrt from thU Kvcviea^ except aa a variety, diffrrinff nvorv ia Iho prwonoo 

 of ae^ntralcoalatlian in n»i>oel or internal vtrurturv. 



Gorm-tike Crown forming a thickened fuaiform descending axis (rhizome, Prcst), terminated by a 

 bud or growing point enclosed by a few brown membranaceous sheaths. Roots coarse, brittle, fleshy, 

 spreading horizon tally, unbranehed, growing in a somewhat whorlcd manner from the crown and the 

 perpendicular axis ; one (or more/) elongated under-ground in a stolou-Iikc manner, and producing a 

 new crown at a distance iVom the parent. When at rest, the rudimentary plant forms a growing point> 

 exterior to the former fronds, at the apex of the crown. 



Stipes hxqzU smooth, cylindrical, hollow, succulent, usually elongated to about two-thirds the height 

 of the frond, traversed by two or three vascular bundles, the base enclosed by membranaceous 

 sheathing scales ; divided above into a separate fertile and barren branch. 



Vrmutum plicate or folded straight, the sterile branch enclosing the spike of fructification. 



Fronds from three or four inches to a foot in height, thin but somewhat fleshy in texture. Sterile 



I 





