﻿Algae. Fucus. 43 



polUcares regularlter et subpectinato - pinnatifidos , pinnis 

 secundariis s. laciniis linearibus obtusis aut rotundatis , li- 

 neam unam v. dimidiam latis atque in lacinulas lineares oppo- 

 sitas subaequales patentes sectis. Tiacinulae hae apice nunc 

 integrae nunc in denticulos duos , tres quatuoi ve sectae re- 

 volutae, tandem in sporangia dilalantiir solitaria aut eon- 

 glomerata subglobosa, continentia congeriem sporarum 

 simplicium Iiaud ila frequenlium gelatinosarum subdia- 

 phanarum. Tota frons constructa cellulis hexagorus in lineas 

 transveroas dispositis aliis duplo longioribus cum aliis mi- 

 noribns seriatim alternantibus. 



In marl TirasiUam orientall - meridionuicm alluente: 

 Com, de Flemmiug , yidalb, de Chamisso, 



XXVII. FUCUS LYINCB. AG. 



Sporangia in thallo frondoso tuberciilosa^ 

 tuberculis numerosis poro pcrtusis includentibus glo- 

 merulos fibrarum articulatarum intermixtis gongylis 

 oblongis aut pyriformibus muco circumvolutis. 



Frondes liiiformes aut foliaceae^ plerumque di- 

 chotomae; saepe poris mucifluis praeditae^ vesiculis 

 immersis vcl nullis, colore plcrumqiie oliyaceo, (e 

 iibris longitudinalibus arctissime compactis con- 

 stantes). 



1. F U C U S V E S 1 C U L O S U S. 



F. fronde plana costata dichotoma integerrima Hneari, 

 vesiculis gerainis globosis, sporangiis terminalibus. 



^g. Spec, L 87. Srst. 2T5. Esp. t, 12. i3. 83. 84. Turn. 

 Hist. t. 88. 



Conf. Martius , de fuci vesiculosi incremento in N. ^ct, 

 Acad. Car. Licop. IX^, 21 5. c. ic. 



Species quara maxime pol^^morpha, cujus varietates ad 

 oram Brasiliae inventae sunt : 



F. vesiculosus, volubilis, fronde spiraliter torta 

 evesiculosa, receptaculis elongatis, Ag. l. c.p. 89. 



F. vesiculo^us, linearis, fronde angusta evesicu- 

 losa, receptaculis elongatis lineari- lanceolatis acutis. Ag, 

 l. c. p. 00. Esp. t. 146. 



Basis callosa. Frons pedalis et sesquipedalis, linea- 

 ris^ dichotoma, angulis acutis, subfastigiata, costa utrinque 

 elevata percursa, vesiculis geminis hemisphaericis immersis 

 ad costae latera, intense olivacea , sicca nigrescens. Spo- 

 rangia turgida, terminalia, solitariaaut gemina , ovata , ob- 

 tusiuscula, vel acuta. 



