78 LAURENCIACE^. v. 



The type of this genus, restricted by the above diagnosis, is Fucus kaliformis, 

 Good and Woodw. {Chylocladia kaliformis, Grev. and of other British writers,) to 

 which are added the other species of the Grevillean genus Chylocladia, which have 

 similarly organised conceptacles. In the structure of the frond there is a very 

 close affinity with Champia, but the difference in the sporiferous nuclei in the two 

 genera is too important to admit of their union. A still greater difference in the 

 fructification separates the reformed genus Chylocladia, as now understood by Prof 

 J. Agardh. 



I adopt the name Lomentaria for the present genus in deference to the authority 

 of Endlicher, Montagne, Kiitzing, and J. Agardh, and in order to avoid confusion 

 in nomenclature ; but it unfortunately happens that L. articulata, Lyngb. the plant 

 originally called Lomentaria by Lyngbye, and to which he restricted his genus, 

 must be removed from the modern genus as at present adopted by botanists.. Dr. 

 Greville, long ago (Alg. Brit. p. 114) remarked that his genus Gastridium, after- 

 wards called Chylocladia, included tico generic types, indicated by differences in 

 fructification, a character which, at the time he wrote, was not considered of sutfi- 

 cient importance apart from others, to justify the dismemberment of the genus. 

 One of these types, comprising Ch. kaliformis, ovalis, and others with similar fruc- 

 tification, constitutes the modern Lomentaria ; the other, comprising Ch. clavellosa, 

 articulata, and others, the reformed genus Chylocladia, J. Ag. Now should the 

 spirit of genus-splitting proceed further at a future time, and Ch. articulata, on 

 account of its articulated frond, be separated from the species of Chylocladia with 

 tubidar fronds, it must either receive a new name, or if its old one, stolen for the 

 present genus, be restored to it, we shall have to find a name to supply the defi- 

 ciency, and perhaps Gastroclonium of Kiitzing may then be applied to the group 

 typified by Ch. kaliformis. 



1. Lomentaria ovalis, Endl. ; frond cylindrical, solid, irregularly dichotomous, 

 naked below, above beset with simple, elliptical, or elongated and nodoso-articulate 

 tubular ramuli. Harv. Phyc. Brit. t. 118. Gastroclonium ovale, Kiitz. Sp. Alg. p. 

 86.5. Var. yS. Coulteri ; frond robust, livid purple, with very obtuse, obovate, sim- 

 ple ramuli. (Tab. XIX. A.) Var. 7. subarticulafa, Turn.; ramuli long, linear, con- 

 tracted and jointed, Tur'n. Hist. ^. 81, n. 



Hab. On the Pacific Coast. /3. at Monterey, California, Dr. Coulter. 7. Nootka 

 Sound, Mr. Menzies, 178?. (v. s. in Herb. T. C. D.) 



In Dr. Coulter's specimens the stems are tufted, six to eight inches high or more, 

 cylindrical, solid, thicker than crow-quill, dichotomous, flexuous with rounded axils. 

 Branches erect, somewhat corymbose, sparingly divided, usually naked for the 

 greater part of their length, densely beset near the summit with elliptic-oblong or 

 clavate, simple, hollow, very obtuse ramuli, and here and there furnished with a 

 few short, lateral branchlets ending in a tuft of similar bag-like ramuli. The walls 

 of the ramuli are thick, composed of several rows of angular, coloured cellules. 



