ACOTYLEDONS. ALG/E. Chordctria. 97 



branches plane filiform repeatedly divided in a pinnated man- 

 ner scattered, the ultimate ones bearing pencils of hairs at 

 length spiniferous, the spines approximate subulate straight. 

 Ag.p. 10. Fucus aculealus, Ligktf.p. 924. Turn. Hist. Fuc. 

 t. 187. 



HAB. Sea-shores, not uncommon. 



2 3 feet long, olivaceous brown when dry. 



The fructification does not seem to be rightly known, and it is only 

 from analogy that Agardh places it in this genus. 

 24. FURCELLARIA. Lamour. 

 Extremities of the frond swelling into closed pericarps. 



1. F. lumlricalis 1 , frond cartilaginous filiform dichotomous fasti- 

 giate, angles of the dichotomies acute, apices forked blunt, 

 fruit in the elongated cylindrical acuminated apices. Ag.p. 10. 

 Fucus lumlricalis, Turn. Hist. Fuc. t. 6. E. B. t. 824. Fucus 



furcellatus, Lighff. p. 932. 

 /3. JasligiatuSj apices compressed transparent ovato-lanceolate 



short acute. Turn. F.fastigialus, Ligh'f. p. 930. 

 HAB. Sea-shores, frequent. Seafield rocks, Edinburgh, very fine, 



Mr. Greville. 

 6 9 inches long, purplish brown. 



2. F.? tycopodioiaeSj frond filiform mostly simple every where 

 covered with closely imbricated filiform patent ramuli gene- 

 rally forked at their apices and swelling into lanceolate pani- 

 culated capsules. Ag. p. 11. Fucus lycop., Turn. Hist. Fuc. 

 t. 12. E.B. t. 1163. 



HAB. North of Scotland, James Brodic, of Brodie, Esq. Abundantly 

 on the old stems of F. digitatus, at Seafield rocks, low tides, Mr. 

 Greville. 



Fronds many from the same base, 4 6 inches long, purplish brown, 

 black when dry. Mr. Greville, besides the pod-like fruit here de- 

 scribed, has had the good fortune to find globular capsules, such as 

 Mr. Turner foretold the plant would be likely to have. It ill accords 

 with this genus. 



25. CHORDARIA. Link. 



Fruit : subclavate jointed concentric filaments, among which the 

 seeds are immersed. A genus whose species accord sufficiently 

 well in habit, and the fruit as far as known. Fronds filiform, 

 cartilaginous, or lubricous, often covered with conferva-like 

 hairs. 



1. C. rotunda, frond cartilaginous filiform dichotomous fastigiated 

 with the angles of the dichotomies rather obtuse, their extremi- 

 ties forked acute, capsules irregular lateral spongy not covered 

 with an epidermis. Turn. Ag. p. 12. Fucus rotundas, Turn. 

 Hist. Fuc. t. 5. E. B. t. 1738. 



HAB. Caroline Park, Mr. E. J. Maughan. Rocks near Kirkcaldy, 

 Mr. Stewart. 



From 48 inches long, dark purplish brown. 



m 



