129 



ed by J. A^ardh), there lb li ! ' 

 Callithamnion, to which genus it Is united bj 



Obdi b L8. CEBAMIACEJE. 

 \.\\\. PTILOTA. 



22'.). plumosa ( T 



compound j secondary branches bi-1 ripu 

 pinnae and pinnules exactly opposite, the Latter - 

 cellular, traversed by a narrow, immersed, jointed filai 

 tetraspores on Bhorl margin of 



pinnules: flavellsB pedunculate, with an involucre of 6 v - - 

 bulate ramuli, Ag. Sp. A. v. 1. p. 385, (A , LI \ 



Fig. 223.) 

 Geramium plumosum, Roth. Plocammm plumosum, L ■ 

 Fucus plumosus, Linn. 

 Parasitica] on the stems of Lcmina/r 

 ner and autumn. 

 Our figure and description apply solely to the var. 

 Turner, which, though abundanl on the sn< 

 and the north and west of Ireland, is rare in England, 

 quite unknown on our Bouthern Bhor< 

 perience goes, it invariably grows on the Btems 



gitata, which it often clothes with a rich feathery 

 fringe. The var. (3 of Turner, which is the common 

 of the south of England, chiefly 



- its characters bo constantly thai J cannol help re- 

 garding it. with Kiitzing, as a distinct species. 

 22 1. sericea {Tl P 



branched; Be ondar - -i ipinnate ; pinnae 



pinnules exactly opposite, the latter linear, 



Bingle row of ispores on shori 



pinnules; favella pedunculate, binate naked, or Burro . 



with a few irregular ramuli, A7-. 



PL XU.Y 



Fucus Beric b, Ghn. i" I 

 i 

 Kfz. 

 Hab. On the perpendicular face- of rocks, between tide-t 

 rarely on the b1 Perennial. Sum 



and autumn. \ I ;\ common. 



This is the var. (3 of Turner's Ptilot ■ ■ just 



! ra mainly in having the ram;:;: 



more simple. 



