"^6 Ceeamie^. Ptilota. 



5. Pt. filicina (J. Ag. mscr.) frondis decomposito-pinnatse piu- 



nis in rachide ancipite oppositis, utraque conformiter par- 

 tita, una niajori, altera minori, majoribus in rachide al- 

 ternantihus, fere a hasi phimosis, pinnellis Hneari lanceo- 

 latis celluloso-cdrticatis, sphaBrosporis in pinnula trans- 

 formata apice suhcorymbosa inter fila circumcirca evoluta 

 conniventia invohicrum mentientia pellucida articulata 

 monosiphonia dispositis, faveUis. . . . 



In Oceano pacifico ad Insulam Vancouver. 

 Proximis speciebus robustior, pinnis fere a basi pinnulas emitten- 



tibus, pinnellisque longius corticatis quam in Pt. plumosa, sed pr^ci- 



pue sphaerosporarum dispositione distincta. 



II. Pinnis oppositis difformihus, una foliiformi non ulterius 

 composita, altera composita; compositis in rachide alter- 

 nantihus. 



* Pinnis evidenter oppositis. 



6. Pt. seeeata (Kiit.^. Bot. Zeit. 1847. p. 3G.) frondis decom- 



posito-pinnatse pinnis in rachide ancipite alata suhcostata 

 oppositis insequahhus, una simphci inciso-serrata, altera 

 pinnati-partita phis minus composita, compositis in ra- 

 chide alternantihus, hasi nudiuscuhs superne plumosis, 

 pinnelhs a hasi latiore Hneari-lanceolatis celluloso-corti- 

 catis, sphserosporis ad apicem suhconicum pinnulae quasi 

 spongiosse inter fiha minuta articulata subulato-rigidius- 

 cula evolutis, favelhs involucratis, phylHs invohicrahhus 

 planis margine serratis. J. Ag. Sp. p. 96. Kutz. tab. 

 Phyc. Vol. XII. tah. 55. 

 In Oceano arctico ad Httora Europse et AmericEe. 



7. Pt. Hypnoides (Harv. ap. Beeclieij Voij. p. 164.) frondis 



composito-pinnata? pinnis in rachide ancipite-alata oppo- 

 sitis insequaHhus, una indivisa foHiformi ovato-lanceolata 

 acuminata integerrima, altera pinnatipartita, pinnelHs fo- 

 liiformibus ceUulosis, sphaerosporis ad apicem pinnulse 

 transformatse circumcirca densissimis in glomeruHim ob- 

 longum congestis, favelHs. . . J. Ag. Sp. p. 97. Harv. 

 Ner. Bor. Amer. II. tah. 220. 



In Oceano pacifico ad Cahforniam. 



