Plates X. XL 



THE COMMON PRICKLY SHIELD FERN 



(POLYSTICHUM ACULEATUIl). 



POLYSTICIIUM, Roth. SchotL 



Clusters of Spore-cases circular, medial, rarely terminal on the venules, covered by an 

 indusium or membranous scale, fndimnm orbicular, peltate, t. 6\, attached at 

 or near its centre, the margin becoming free. Veins pinnato-furcate ; venules 

 direct* disunited at their extremities, the lower anterior one in each fascicle 

 on the fertile parts of the frond bearing a sorus. 



P. acitleatum: fronds bipinnatc, lanceolate or broad linear-lanceolate, rigid; pinnules 

 distinct, and attached by their wedge-shaped base, or obliquely decurrcnt, or 

 confluent, the anterior basal ones larger, all prickly serrate ; sori infra-media!. 



FtamfCiltnc ACHLEATtu, BotK Fiora GmuiiW iiL 70. Ikakim, FtorifrtpAui Arifraflfctf.fr.OL itofti>ffM, 



Mv*«*t *f HritUh littany. 111. SpXT/tf, Fermi, 32, t t 17 (in* ttmct U tO *rti*ti< u). Xrm-m, /littery of 



BritUh &rmt t t<39 (in part). JAwr, HMfal */ Britid Frrvu, SO. IY*#1. TtmUmm &tr*kgr*pti+ t $3. 

 Ffr t Ornrra Frtieum, 2*8. 



!Vu.tix)wvm AtntMli.U, /.iflinrr*, 6j*Ci>* Phatarvta, 1A52. 



AariDiuu AcVLiirvM. tovrti, ^ri^A^V J^dimw/^ A« JfofwUv l$O0,iL37. &W/4, J7 m Itrtimiai, U22; 



EmyiUX Bvtanjt *xii. t, 1602 ; fbgtuh Fiona t i*. 277. J/ookrr am/ J raotf, BritUh Flora, 5GS. tntfirav*-, 

 Sf*<ic* 2VaA/dm», T. 23*L Jjw^/, SytfrMu rrprtelilium t lv t 103. 



Aim&it-u lohitvm, StiMxAr, Krypfo/amittAe Cwi-W, *2, t. 40. 

 Airman nnuiTtu, 7X>», FnrJf&mv* Plerv X*p*h**i*. 



Var. lobatum: fronds narrow-lanceolate, very rigid ; pinnules (except the larger basal 

 ones) elliptic, not auricled, nearly all decurrcnt or confluent, prickly-serrate, 



POLVCTICIIIUI ACL'LEiTtlT, *\>»w t Utittoy tf J/fitith iTTAt* Itf.) (in put). 



PoLYimcniltf ACrmn u $> LOM :u rtDlOLDEJ, fttaiin, Fkrifnifrfria Britwiiw, [r. 01. 



1'OLTflTlCUUX ACCLIATUH >♦ LOBATCW, JXvASff, Fhrifrepki* /Intend, if. 01. J/oOfV, //W-U>.*( </ ftciUth 



PoLtmicnuu pLf UMTil, /> C'rfaioWr, Jferv JVatngw i*-, v. 241, 



Asniiiutt U>»atu*. Swrf j, ScXraJcr's Jwmal fir die R&tmik, ISOftii. 37. &W/A. ««m tfrt/ita™, 112:1; 



Sttjhti JJofony, xrit* t. Ifi03j E*$K*& Fior* 3 [r. 278. JIsAts *uJ Ar**tt t BritiA FI*ra t 3GS. J/iv-fcuy. 



Horn //*fc>r .-i h 33*. HttfJcnov, Sp«ie* i'A?ar*rurr, i\ 200. 

 AtPiDiru lodatcu |t. LO^cnuiniOtPtitf l[&>Wr omJ Amott, BrititA i-Wo, 5GS. 

 Asndilh accuatcv, &AAkiAr t Krypi6$*t*i*<li<i f/tiruV.W, IX, t SD* 

 AiiiPuy I'uxKXirfii. SJfuJtt t Ximt»^*ior Btf&*k*4 r it Ok 



AirlDtl'M mtuUlDlrU, &n/frr, AJunbtitiQ Eptp\ylt#*peri*arMi* fl%tattr,^ t hi 

 AftNDICU itrMriM, W^, fl# FtHc'thn* terit Ifuxp>fi<r t Zt ; snA irf Knulfiui. 

 A>HDirV ItCTCM. A>n, Prodrvnut Fk>r* Ntpak***4 f +, 



A&rtDH'U OCCUATUM, HW/iVA, Cr/a/iww f 00). 

 PoLTropivu toB*Tt :a f lt*J+M t Fkr* jA^fcu, 150. 



P0LT|^l>]W lADtAitntp IfaJtvn, Ftar* .i^/iftJ, 1-W. fttfte* f r\l>Wt JMUmMttS, i\ t, 5*1, 



roi*TK>Mrw PtrKtrcttr, /^>i^//wr t - -\W. 140-* 1 



EXPLANATION OF THE 



PLATES. 



Puts X.^PoLTsticilcu ACC(.r*Tt'V; A, from Xi>rA^>ij MidJ)csr( t 5. A Oruy, 8, P. uimnn Attuvruu ; from 

 Plat* XI.— Poltkticiith aocliatdi loiiati u * A unl B^ from XonrAod. Mi»M!c*oi # if. K Onty. 



HABITAT.— A *i4.*lT-diii|>crKd and iwt uncommon pUnt,in »Udj bcdp^batikj, And rimiliriy aholkrod <iu«liot«. ll U 

 found all ovrr KnirUtiil, ScolUnd t *n*J Wnlo*, arnl in Ihc majority of iho touati<s, the rvwrdi uf lln* varictT /o^i/ivn 

 allowing an Cjtit]l/*Kta if not wider rnn^o. Tbo fo»r pm>tiQCM of Irvlaail al« jicW it, u Jo tho Chiuiwl I»(w; but 

 w© an* ool au«vo of *W hating Uvn found in tho Xurlhrrn o^r WcaUvii lalca. It occurs at tbo *r* Icvrf, jtj ihc auuth- 

 wubrn paria of England i andintUformof WW»w ( whkh*«iiiilhomon> roiumon inSttXbnd.ilattttidit to upw^inlt 

 of 2000 f«t in tho llighljifttk 



OEOtiRAPUICAL 1HSTIUUUTION*— TliU Korti *pp«ra to 8e found nonriy orcr the whoioof Earop^iUo^nrrvno?! 



rccordod froQ the 8c-Ai;dir^avia:i kin^domi tbrMU^h Centra) Kuropc to Iho Sp^nuh Pcaim\iln ; but wo aro not awaro i*f 

 ita occurrence in Orccc« or Turkey, Although *• ihc raon* AI|huo and rigid J*. t/mclUU ia found in th* fojrocr, Iho 

 nrcarnoo of P* +wtt*fvm ia to bo luaptctod. In Aaia it i« found in the ltuwan donuntona from Colckia to U^koran ; 

 and in tariout uorta of ItHtUh India (i/o. UwUr, and /. Smitl}, Iho *UpiM*n U*Sum ^f l)*io, and A* ocW/h/b* of 



WitJlicfc, not bob(f dUtitiKuihhnulo from tbo HHtuili ht*tfmm t and tho J. ttUmUm uf Don U**u« tho moo with thr 





