Ser. EHODOSPERMEiE. Fam. Rhodymeniacea, 



Plate CCXX. 



STENOGRAMME INTERUUPTA, Mont, 



Gen. Char. Frond rose-red, membranous, flat, nerveless, laciniate, com- 

 posed of two strata of cells ; the medullary stratum of roundish-angu- 

 lar cells, in several rows; the cortical of minute, coloured cellules. 

 Fructification : 1, linear, nerve-Hke conceptacles, containing within a 

 thick pericarp confluent masses of minute spores ; 2, superficial, con- 

 vex nemathecia, formed of strings of cruciate tetraspores. — Steno- 

 GRAMME [Harv.), from <Trevo<;, narroio, and ^pa^fjurj, a line, alluding 

 to the linear fructification. 



Trans rosea, membranacea, plana, enervis, laciniata, stratis duobus composita ; 

 strata medidlari ex cellulis magnis rotundata-angulatis pluribus seriebus dis- 

 pasltis, earticali ex cellulis minimis caloraiis conflata. Fruct. : 1, cystocarpia 

 linearia, nerviformia, intra perlcarpium crassum sporas minimas congregatas 

 favenila ; 2, neniathecia externa, convexa, in fila moniliformia tetrasporarum 

 cruciaiarum evoluta. 



Stenogramme interrupta, Mont, in BucJiart. Rev. Bot. 1846, p. 483. 

 Harv. Fhjc. Brit. t. 157. /. Ag. Sp. Alg. v. %. p. 391. Kiitz. Sp. 

 Alg. p. 873. Harv. in Hook. Fl. N. Zeal. v. 2. p. 249 ; Ner. Bor. 

 Amer. v. 1. p. 163. t. 19 C. Hooh. Fl. Tasm. v. 2.p. 319. 

 Stenogramme Europaea, Harv. in Herb. 1847. 



Stenogramme CaHfornica, Harv. Bot. Beechey, p. 408. Kiitz. Sp. p. 874. 

 /. Ag. Sp.Alg. v. 2. p. 392. 



Delesseria interrupta, Ag. Sp. Alg. v. 1. p. 179 ; Syst. p. 250. Mant. in 

 Webb, Ot. Hisp.p. 15. ^. 8. Endl. Zrd Suppl.p. 53. 



Hab. Georgetown and Port Arthur, Tasmania, W. II. H. 



Geogr. Distr. Tasmania. New Zealand. California. Florida. Coasts of 

 Spain. Mediterranean shores of France. Plymouth Sound and north 

 Devon, England. Cork Harbour and Strangford Lough, Ireland. 



Descr. Boot a small disk. Frond flabelliform, 6-12 inches long and broad, 

 rising from a small filiform stem, which rapidly passes into a cuneate mem- 

 brane ; this membrane further expands, then forks, and afterwards is repeat- 

 edly but irregularly dichotomous. The lacinlde are \-\ inch broad, linear, 

 spreading, with blunt apices and axils. There is no proper midrib ; but in 

 specimens Avhich produce conceptacles there nms through the centre of each 

 lobe a raised and thickened line, of greater or less lengtlj; this is afterwards 

 changed into a linear, sausage-shaped conceptacle, containing conglobated 

 masses of minute spores ; these conceptacles are sometimes two inches long. 

 Nemathecia (on different individuals) thickly scattered, as wart-hke blotches, 



