1049 



Genus, Trichomanes. 



"Venae pinuatae, alteruae, simplices ramosaeve, steriles apice acuto libero desinentes. 

 Sorus inlramargiualis iininersus aut supramarginalis exsertus. Indusium infiiudibu- 

 liformi-cylindraceum, limbo inlegro vel crenulato. Receptaculum filiforme, elongatum, 

 indusium excedeus, iuferne capsuliferum. Capsulae lenticulaves, sessiles. Rbizoma 

 repens, paleaceo-pilosum, SEepe (in T, crispo, T. plumoso &c.) obliquum crassum sim- 

 plex angulatum, saepissirae filiforme teres ramosum elongatum. Radices filiformes, 

 simplices aut ramosae, radiculis piliformibus. Stipes varie longus, in plurimis teres, in 

 T. penuuto, T. Sellowiauo et aliis in una pagina canaliculatus in altera convexus, in T. 

 plumoso et T. Henkaeauo (an exsiccatione?) acute triangulus. Frons bygroscopica, 

 tenera, transparens, simplex aut varie divisa, uempe lobata, piuuatifula, pinnata usque 

 supradecomposita, paginis conformibus. Venee vix promiiiuls, e costa pinnatim exo- 

 rientes, alteruae, steriles venulisque ante marginera i'roudis libere desinentes, in para- 

 grapho prima crebrse 1. creberriraee fere parallelae uni — pluries furcatae, veuulis parum 

 divergentibus, in paragraplio secunda et tertia distautes multo parciores pinnatim divisas, 

 venulis divergentibus. CellulEe parencbymatis bexagonoideas, kititudine duplo triplo- 

 ve longiores, minutae et miuutissimae. Sorus aut intramarginalis seu frondi immersus, 

 aut supramarginalis seu fronde obliterata apice venae venulceve subdenudatae insidens. 

 Indusium in Achomane iufundibuliforme ore iutegro simplici, in Eutricbomane et 

 Pacbycbaeto infundibuliformi-cylindraceum oris crenulati repandive margine patentis- 

 simo subreflexo, unde limbus bypocraterimorpbus quodannnodo provenit. Recepta- 

 culum iudusio duplo triplo quadriiplove lougius, saepissime setaceum flexuosum, rarius 

 subclavatum, basi intra indusium capsuliferum, in parte superiori nuda punctis oblon- 

 gis impressis spiraliter ambientibus notatiun." — p. 13. 



The author then recapitulates the characters of the genus Tricho- 

 manes, as they are given by Linneus, Swartz, Bernhardi, Willde- 

 now, Robert Brown, Kaulfuss, Sprengel and Endlicher, showing how 

 completely they contradict each other, and how inadequate they are 

 to the correct definition of a genus. He divides the restricted genus 

 Trichomanes into three named sections, as under. 



* ACHOMANES. 



1. T. pellucidum, ^MM2-e. 



2. T. Kaulfussii, Hook. T. lucens, Hook. olim. T. astylum, Kaulf. in Sieb. Ft. 

 Mixt. n. 340. 



3. T. fastigiatum, Sieb. Si/n, Fil. n. 144. 



4. T. beteropbyllum, Willd. 



5. T. cristatum, Kaulf. 



6. T. Martiusii, Presi. " T. fronde lineari-Ianceolata elongata utrinque angustata 

 stipiteque pilis patentibus hirsuta profunde pinnatifida, laciniis borizontalibus angulo 

 acuto interstinctis oblongis obtusis integerrimis contiguis, inferioribus decrescentibus, 

 summis confluentibus, venis parallelis, receptaculis setaceis longissimis, frondibus no- 

 vellis (nondum evolutis) birsutissimis, rbizomate crasso lignoso polyrbizo adscendente. 

 T, pilosura. Mart. Crypt. Bras. p. 104, t. 68, fig. dextra, nee Raddi. 



" Habitat in Brasiliae provincia Rio Negro in montibus Arara-Coara et Cupati flu- 

 vio Japura imminentibus, ubi Januario fructificans collegit celeb. Martius " — p. 36, 



4t 



