IP0B0CHNAC1 21 



at length cup-shaped, Btalked : receptacles repeatedly dicho- 

 tomous, tapering more or Less at the apex, Lyngb. llyd. Dan. 

 ,,. 36. f. 8. (Atlas, PL IV. Fig. L6.j 

 Imhmi' Loreus, Linn. V. elongatus, Linn. 



Ha}). On rocky sea-shores, near low- water mark. Annual? Win- 

 ter and Bpring. ( ommon. 

 This well-known plant is very common on most of the 

 rocky Atlantic coasts of Europe and North America. Au- 

 thors are at variance as to its duration: Turner and Car- 

 michael asserting thai it is a perennial; Greville and Mrs. 

 Griffiths that it is annual, h appears however f<> reach ii< 

 lull growth within the year, and vast multitudes of fronds 



then decay, while their receptacles are detached, and drift 



ashore in tangled strata. Possibly some survive to a Becond 



season, and throw out new receptacles ({'or I am unwilling 

 to Bel aside the evidence of so trustworthy an observer as 

 the late Captain Oarmichael) : but I have repeatedly and 



in vain Bought tor instances of this second growth, and am 

 therefore disposed to regard the species as being, under 

 common circumstances, an annual. — granting tint it may 



occasionally be biennial from the influence of local causes. 

 The common name is Sea-thongS, of which the lengthy 

 Greek by which it is known to botanists is nearly a literal 

 translation. It is used in the manufacture of kelp, in w Inch 

 salt it is said to be rich, though inferior in this respect to 

 some of the true JFuci. 



Order 2. SPOROCHXJ' 

 VII. DESMARESTIA. 



17. lig-ulata (Th? tapering Vevmarestia) ; frond flat, with an 

 obscure midrib, repeatedly pinnate; pinna? and pinnulse op- 

 posite, Linear-lanceolate, tapering Toward- both extremities, 

 Lamour. "Ess. p. 25. (Atlas, PL V. Fig. 17.) 

 Desmia ligulata, Lyngb. Bporochnus Iigulatus, Ag. Laminaria 

 ligulata, Hunk. Fucufl Iigulatus, Light/. V. herbaceus, Huds. 

 Hob. On the rocky bottoms of submarine tide-pools, near low- 

 water mark ; and at a greater depth. Annual. Summer. 

 Not uncommon. 

 A very elegant plant, one of the m<»<t beautiful of our 

 olive-coloured Algae, and not uncommon on any of the Bri- 

 tish shoi-es. It was first described by Lightfool in his 

 1 Mora Scotica,' where an excellent figure : .- also given. 

 With a perfect regularity in its branching, and in all the 



