258 37//S BOTANICAL MA(;A/JSK. LVoi. xxx. No. 3.55. 



Lomentaria umbellata H. et II. 



Flora Nov. Zcl., p. 254, I'l. 119C (1845).— J. Ac: Epicris, p. 

 300.— Id.: Anal. Alg. Cont. Ill, p. 87. 



= Lomentaria catcnata IIarv : in Gray: List of Plants coll. in 



Japan, p. 331 (1857).— J. Ac. : Epicris, p. 635.— Okam. : Illustr. 



Jap. Alg., PI. 26. 

 =Chylocladia gclidioidcs Hakv.: Phye. Austr. Syn.. p. 18. (1863). 



—J. Ac: Anal. Alg. Cont. Ill, p. 87.— A. et E. S. Gepp: Mar. 



Alg. N. S. Wales, p. 257.— Okam.: Mar. Alg. Caroline Isl., p. 88. 

 = Cbylocladia Ramsayaim J. Ac : Till Alg. Sys-tem. IV, p. 87 



(1884).— Id.: Anal. Alg. Cont. Ill, p. 87. 



After studying the type .specimens of the four species above 

 mentioned I have a slightest doubt that they bdong to one 

 iind the same species. The illustrations of L. catenata IIaky. 

 given bv Okamura in the work referred to above are the most 

 exhaustive and excellent ever appeared for the plant. When it 

 is found growing in a sheltered place or among other larger 

 algae, the articulations are generally elongated, with lateral 

 branches sparing and irregularly disposed. Such form exactly 

 coincides with the type specimen of Ch. Ramsayana J. Ac. 



Ch. umbellata H. et H. has been distinguished from other 

 allied species b}- having recurved and hamate branches in an 

 upper part of frond. Examination of a large number of speci- 

 mens of L. catenata of various stages of development, sho\v 

 that such form of branches is very often present in that species. 

 The primary part of frond of L. catenata IIakv., as in Ch. 

 Ramseyana J. Ac, consists of several decumbent articuli radiate- 

 ly directed from a small scutellate root. Each decumbent arti- 

 eulus catches hold of substratum by a small ha])ter at its apex. 

 From the up])er side of the articulus an erect shoot is given rise 

 to form a future ])riiici])al segment, or aiU'thcr decumbent arti- 

 culus, similar as tlie first one, may be issued. The latter mode 

 of ramification is often repeated several times so as to form a 

 creeping rhizome. An erect shoot may also be found standing 

 upon one or niore of the decumbent articuli (Fig. 1). When 

 there is no suitable substratum for some creeping articuli, tlic 



