71 



ANOHISTEA. — Blcchni spec. Lin. — Woodwardiae spec. Swartz. — Doodiae spec. 



p es j Frondes monomorphae. Venae internae, ramosissimae, in maculas costales hemihe- 



xa tr onoideas ohscure angulatas multirameas anastomosantes, venulis parallelis simplicibus fur- 

 catisque apice arcu marginali cartilagineo conjunctae seu anastomosantes. Sori venis trans- 

 versis inserti superficiales, heteromorphi : costales (costae pinnarum oppositi) linearcs elongati, 

 costulares fcpstulae laciniarum oppositi) globosi rarius ovales. Indusium membranaceum, 

 integrum in soris linearibus lineare elongatum, in globosis ovale breve vel semiorbiculare. 

 Receptaculum lineare, vix convexum, elongatum aut hreve. 



BJbizoma subglobosum. Stipes semipedalis rachisque flavescenti-lividus paleis ovatis 

 acutis fuscis raris adspersus supra canaliculatus subtus semiteres. Fasciculi vasorum stipitis 

 rachisque quinque, peripherici, strato nigro-fusco ohducti , duohus anterioribus majoribus 

 ovalibus aut compressis, tribus posterioribus teretibus tcnuibus aequalibus, subincle septem, 

 latcralibus anterioribus tenuissimis facile praetervidendis. Frons uni-hipedalis , tenuiter co- 

 riacea, praeter costas costulasque paleis ovatis acutis fuscis patentibus parvis subtus adsper- 

 sas "Iaberrima, subtus pallida, oblongo-lanceolata , acuta, laeviter hygroscopica , pinnata 

 Pinnac quatuor-semiquintum pollieem longae, octo-decem lineas latae, cum rachi artieula- 

 tae ideoque deciduae, sessiles, patentissimae, saepe retrorsum laeviter falcatae, lineari-Ian- 

 ceolatae, obtusae, ultra tres quadrantes pinnatifidae, inieriores hasi acutae, supcriores basi 

 ohlique suhcordatae. Laciniae oblongae, ohtusae aut acutiusculae, laevitcr falcatae, sinu 

 acuto intcrstinctae, integerrimae. Costae (pinnarum) luride flavcscentes, supra canaliculatae, 

 subtus convexae. Costulae (laciniarum) tenues , fuscae, supra laeviter canaliculatae, suhtus, 

 planae non prominulae. Venae venulisque creberrimis parallelis fuscae flavescenti-pellucidae. 

 macularum serie unica. Sori fusci, costae costulaeque subcontigui, costales unam - semiter- 

 tiam Iineam longi recti parallcli, costulares semilineales vel paululum majores. — Species 

 unica, boreali - americana. 



DifVert a Woodwardia venulis arcu marginali calloso-cartilagineo anastomosantibus, 

 soris superficialihus heteromorphis, indusio plano, a Doodia venulis aicu maiginali conjun- 

 ctis venulisque internis, maculis uniserialibus, soris hcteromorphis costae coslulacque conti- 

 guis, indusio memhranaceo. Nomen derivatum ab ayxioitoq agnatus, affmilatem cum Wood- 

 wardia et Doodia indicans. 



Anchistea virgimca. — Filix mas vulgaris similis, pinnulis amplioribus planis nec 

 crcnatis, virginiana Pluck. alm. Ibl. t. 179. f. 2. — Blcchnum virginicum Lin. mant. 301. — 

 Blechnum carolinianum Walt. car. 257. — Woodwardia Banistrriana Michx. amcr. II. 263. 

 Swartz syn. 117. — Woodwardia virginica Swartz syn. II". Willd. enum. 1075. Willd. spec. 

 V. 418. Pursh fl. bor. am. 662* Dcsv. in ann. soc. lin. par. VI. 28o. Spreng. syst. IV. 94. 

 Link fil. hort. her. 81. — Doodia virginica Presl tent. plerid. 99. — Blechnum serrulatum 

 Spreng. lierh. (ncc Michx). 



Habitat in paludosis et umbrosis sylvis Americae borealis (Bareth), in Virginia 

 (Michaux), in Carolina (Pursh), in Massachusets ad Danvers (Oakes), in Louisiana 

 (A. Gray). 



