Phaeozoospovinse, Laminariaceje, Maci-ocystis. 371 



MACROCYSTIS Ag-. [1821] Sp. I, p. 46, Syst. p. XXXVIir, Ptov. Al- 

 ycuj^Mtt. Macroc. iii kctn Ac. Leop. Carol. Vol. XXI, I, (1829), p. 

 281 (Etyni macros niagnus et ctjstis vesica), Kuetz. Phyc. gener. t. 32, 

 f. II, Sp. p. 582, J. Ag. Sp. I, p. 153, Aresch. Observ. phycol. IV, 

 p. 21, H. Will in Botan. Zeitung 1884 (anatomia), O. Rosenthal 

 in Flora 1890 (anatomia), De Toni Syst. Uebers. Fucoid. 1801 , 

 p. 177, Kjelhn. in Engl. & Prantl Natiirl. Pflanzenfam. 97. Liof. 

 p. 260, Fuci, Laminaria', Lessonicv sp. auct. — Radix teres, ra- 

 mosissiraa, ca3spitosa, orbe lacunarum muciferarum in cortice et 

 saepe lacunis sparsis in centro pmedita. Trunci nunc e rhizomate 

 nunc directe e radice cxeuntes, inferne paullulum ramosi, superne 

 simplices, longissimi, unilatoraliter foliiferi; cortex tenuis, squania- 

 tim abjcctus; orbis lacunarum muciferarum intra corticem prie- 

 sens, lacunis magnitudino, ordine ot loco variantibus, medulla e 

 tilis collularibus tenuioribus crassioribusque implicatis constans, 

 (luorum tonuissimi rami horizontaliter inter fila cellularia et longi- 

 tudinalia proxima contextus firmioris (ligni Areschoug) intrant ea- 

 demque circumcirca investiunt ut medulla canalibus cincta videa- 

 tur, in sectione transvorsali punctum contrale ostendentibus, ma- 

 ievvce inclus* forsan indicium. Folia (lamiuco) in trunco unilatora- 

 litor superimposita , petiolata, petiolo apice vosiculam gerente; 

 lamina in apice vesiculse sessilis, simplex, oblonga, saspe longitu- 

 dinaliter plicato-rugosa, rarius fere plana et Scepissime margini- 

 bus ciliata. Folium in trunco terminale latius breviusque, inferio- 

 ribus dissimilo, lateralifcer a basi in apicem scissum in lacinias pla- 

 nas in folia inferiorilius similia sensim excroscontos. Sporangia cum 

 paraphysil)us clavato-truncatis inarLicuIatis in foliis domorsis prope 

 radicem maculas seu soros forma^ varia) formantia. 



1. Macrocystis angustifolia Bory in Dict. class. X, p. 9 [M. angusti- gig 

 foliits, quoad spocimina chilensia). J. Ag. Sp. I, p. 156, Aresch. 

 Observ. phycol. IV. p. 22, Post. et Rupr. Illustr. Alg. tab. V, Ma- 

 crocj/stis angustifrons Rory Voy. Coquille n. 8, tab. 8, Macro- 

 ci/stis zosterwfolia Ag. Rovis. p. 21, t. 28, f. 13, Macrocystis pi- 

 rifera var. angustifrons et var. zostera^folia Kuetz. Sp. p. 5S3, 

 Fiicus piynferns Esp. Fuc. t. 124? (non Turnor). — Rhizomato 

 plano, laciniato, supra ctespitem radicum effuso, intus utrinque 

 serie lacunarum muciferarum lateribus parallela ornato, e margini- 

 bus utrinque radices et truncos longissimos cauliformos omittente 

 compressos vel planos, in sectione transversali intra corticem orbem 



