KIImdvm i;\i \ 107 



near low-water mark; also among the roots of Laminaria 

 digitata. Annual. Fruiting in summer. Frequent. 

 Thia differs from the preceding species in its more flaccid 

 substance and duller colour, and tne different position of 

 the tetraspores, these being confined to the cilia, while in 

 R. ciUata they are immersed in the laciniseof the frond. 

 To this may be added, thai £. ciliata is a winter plant, and 

 R.jubata in perfection in summer. Few plants arc more 

 sportive in appearance : specimens are often found in which 

 the cilia are very copiously developed, or where the whole 

 frond i> exceedingly Blender, filiform, and entangled. ^nc]i 

 examples may at first sight be mistaken for Giga/rtMMk 

 acicularis. 



183. palmata [The Duhe or DilUsh Shodymenia) ; frond coria- 

 ceous or submembranaceous, purple, broadly wedge-shaped, 

 irregularly cleft, palmate or dichotomous, Bometimes repeat- 

 edly laciniate j the margin Hat and even, sometimes winged 

 with leaflets ; granules distributed over the whole frond in 

 cloud-like spots, Qrev. Alg. Brit.p. 93. (Atlas, PL XLI. 

 i gg. L89 and L90.) 

 Sphserocoocus palmatus, Ktz, Halymenia palmata, Ag. Deles- 

 seria palmata, Lamour. Ulva palmate, Dec. Fucus pal- 

 matus, Linn. F. ovinus, Gunn. P. caprinus, PI. Dan. V. 

 bullatus, PI. Dan. P. rubens, JSsper, V. dulcis, G 

 Ulva caprina, Gunn. Fucus Sarniensis, Mert. V. delica- 

 tulus, PI. Dan. Sphsrococcus Sarniensis, Hook. Bhody- 

 menia Bobolifera, Qrev. Sphserococcus soboliferus, Ktz. 

 Halymenia sobolifera, Ag. Diva Bobolifera, Lyngb. Fucus 

 soboliferus, PI. I 

 Hah. On recks within tide-marks, and on 1 1 1 * * steme of Put . I - 

 minaruB^ etc. Annual or biennial. Winter and Bpring. 

 At first sight it will scarcely be supposed that the speci- 

 mens selected for the illustration of this species belong to 

 lie plant, and yet these figures by no means exhibit 



the extreme of variation, for there are varieties mere 

 simple than the one and more finely divided than the 

 other. The extensive list of synonyms given above shows 



a large number of book species formed out of the varieties 



of this plant. M<»>t of these are admitted by modem 



authors to he, what I have considered them, merely forms 

 of l£. palmata. When such varieties are seen in a dried 

 state in the herbarium, they appear so different that one 



may anticipate much difficulty in tracing the limits of the 

 g. But on the shore the collector experiences no 



