Eu-Floridese, Ceramieae, Microcladia. 150i 



libus forcipatis convergentibus, adultis patulis; tetrasporangiis iu 

 ramulis ultimis paeriultimisque evolutis, subverticillatis. 



llitb. in oceauo Pacifico ad « Una Nootka » (Dr. Scoulek), 

 « Fort Vancouver » (Garry), « Unalaschka » (Wossnessenski); ad 

 « Golden Gate » California? (Pike, Harvey). — Frondes dense c;e- 

 s[iitos;e, 6-10 cm. circiter long. aequantes, setam porcinam crassi- 

 tudine vix excedcntes, dense corticatse, subsecundatim rambsae. 

 Frons transverse secta adparet leviter compressa aut fere teretiu- 

 scula, cellula centrali hexagona cellulis 6 paulo minoribus cincta; 

 hse externe minoribus cinguntur, superficiales demum endochro- 

 mate colorato insignes. 



3. Microcladia Coulteri Harv. Nereis Bor. Amer. II, p. 269, t. 33 A, 2346 

 J. Ag. Epicr. p. 110. — Fronde filiformi, compressa, subdichotomo- 

 pinnata pinnis secus rachides permeantes alternis subdistichis de- 

 composito-pinnulatis, pinnulis juvenilibus in pinnula adultiore ad 

 marginem superiorem provenientibus incurvis, sensim alternanti- 

 bus patulis subrecurvisque; cystocarpiis subglobosis aut bilobis, 

 ramulis brevibus 2-3 longioribus subinvolucratis; tetrasporangiis 

 in pinnulis antepsenultimis plurimis sine ordine sparsis. 



Hab. ad oras Californise (Coulter). -- Frondes 10-20 cm. longae, 

 1 millim. et paulum ultra crassae, sursum compressae, raehide le- 

 niter flexuosa donatse, alterne ramoso-virgatse, ramis suberecto- 

 patentibus eximie pinnatis, pinnis iterum compositis. Rachis, in 

 sectione transversali regionis inferioris monstrat tubum centralem 

 amplum cellularum majorum orbe singulo aut orbibus pluribus 

 contextu cellularum minorum invicem separatis cinctum, cellulis 

 his minoribus interstitia ergo impleutibus. Tetrasporangia (sec. J. 

 Ag.irdh) cruciatim divisa. Color purpureo-rufescens. Habitus quasi 

 Ceramii canccllati. — * Microcladia californica Farl. List of Mar. 

 Alg. of U. St. 1875, [». 372, n. 300: pinnulis ultimis dichotomo- 

 rorymbosis ; cystocarpiis ad ramulos externe insertis, nudis. Ad 

 « Oregon » et ad littus Californise (Farlow). — A typo differre vi- 

 detur cystocarpiis nudis. 



1. Microcladia pinnata .1. Ag 1 . Anal. Algol. cont: IV (1897) p. 34. — 2:317 

 Fronde filiformi-compressa; tota dense et quam maxime regularitec 

 pinnata. pinnis secus rachides permeantes alternis distichis decom- 

 posito-pinnulatis glabris, pinnulis in acumen longius attenuatis, 

 juvenilibus in pinnula adultiore ad marginem superiorem provenien- 

 bus, sensim alternantibusj patulis. 



l\<tb. ad oras Novae Zelandiae (Laing). — Hsec species est evi- 



