Ser. Chlorosperme.t;. Yam. Confervacea. 



Plate CI. 



CLADOPHORA? ANASTOMOSANS, Harv. 



Gen. Chae. Filaments tufted, articulated, uniform, branched. Articula- 

 tions filled with green, granular eudochrome, which is changed at 

 maturity into zoospores. — Cladophora {Kiitz.), from K\aSo<i, a 

 h'anch, and (popeco, to dear. 



Fila ccespitosa, articidata, ramosa. Articuli endochromate viridi grumoso, de- 

 mum in zoosporos mutato, repleti. 



Cladophora? anastomosans ; bright-green, rather rigid, rising from matted, 

 irregularly branched filaments ; ujDright filaments (fronds) stipitate, 

 uncial or biuncial, distichously bi-tripinnate ; pinnae and pinnules op- 

 posite, horizontally patent, the ultimate pinnules here and there ana- 

 stomosing ; articulations of the rachis and primary pinnaj cylindrical, 

 many times longer than broad, of the ramuli 2-3 times as long as 

 broad, constricted at the nodes. 



C. ? anastomosans ; lateviretis, rigidiuscida, ex fills Intrlcutls vage ramosls ra- 

 dlcallhus enata ; fills erectls (v. froudlbus) stlpltatls unclallbus v. blunclallbus 

 distlehe plurles phmatls ; plnnls plmiullsque opposltls horizontalUerpatentlbiis, 

 ultimis lilc illlc auastomosantibns ; articulls ramorun^ majorum cyllndrlcis 

 longlssimis, ramulorum dlametro 2-3-plo longlurlbns ad genlcula constrlctls. 



C. anastomosans, Harv. hi Trans. R. I. Acad. v. 22. p. 5G5 ; Jig. Auslr. 

 Exsic. n. 582. 



Hab. Cast ashore at Fremantle, rare, W. H. II. 



Geogr. Distk. Western Australia. 



Descr. Originating in a mat of intricately tangled, irregularly branched, de- 

 cumbent, confervoid filaments. 'Fronds or upright filaments tufted, 1-2 

 inches long, the basal articulations or stipes \-\ inch long, regularly pin- 

 nated in several series, the whole having an ovate or ovate-oblong outline. 

 The pinnae and pinnulas are perfectly distichous, and spread nearly at right- 

 angles from their respective rachides ; the j-j/w?/* are subdistant, i\\Q p bin idee 

 closely set. All the divisions are strictly opposite, except by the occa- 

 sional suppression or malformation of a ramulus. The ramuli more or 

 less anastomose at their tips, and thus the older frond assumes partially tiie 

 character of a Mlcrodlciyon. The basal articulations of each pinna, and 

 the lower ones of the main rachis, are of great length ; the upper become 

 gradually shorter, and those of the pinnules are quite short. The colour 

 is a vivid yellowish-green. The substance when recent is rigid, and the 

 frond does not closely adhere to paper in drying. 



