Lmmnaria.] ALG/E INARTICULATE. '-'/I 



some species be considered as such. Fructification, as far as 

 hitherto known, either seeds mixed with a mass of vertical, jointed 

 filaments, or roundish granules, without filaments ; forming, in both 

 cases, dense spreading spots or sori, on the surface of some part of 

 the frond. Structure densely fibroso-cellular, without any appear- 

 ance of reticulation. Grev. 



7. Alaria. Grev. Alaria. 



Frond membranaceous, furnished with a percurrent, cartila- 

 ginous midrib, the stem pinnated with distinct leaflets. Fruc- 

 tification ; pyrifbrm seeds, vertically arranged in the incrassated 

 leaflets. Grev. Alg. Brit. p. 2o. t. 4 — Name; ala, a wing, from 

 the winged base of the frond. 



]. A. csculenta, Grev. (esculent Alaria); frond linear-ensiform 

 entire at the margin, pinna? linear-oblong fleshy- — Grev. Alg. 

 Brit. p. 25. t. 4. — Agarum csculentum, Borg. — Lamiuarh 

 iscdenta, Lyngb.—Ag. Sp. Alg. v.l.p. 110. — Fucus exuh Light f 

 Scot. p. 938. t. 28. E. Bot. t 1759. Turn. Sgn. Fuc. p. KM. 

 Hook, in Fl. Lond. cum Ic. 



Coasts of England, Scotland and Ireland, especially in sheltered rocky 

 bays. Winter and Spring. ©.—Frond 2—\2 and even 20 feet long, of 

 a greenish-brown colour. In Scotland it is known by the name of 

 Badder-locksy and is eaten both by men and cattle ; the former prefer 

 the midrib, rejecting the more membranaceous portion. 



8. Laminaria. Lamour. Laminaria. 



Frond coriaceous (rarely membranaceous), plane, expanded, 

 without a midrib. Fructification : seals or granules forming 

 dense sori or spots, and imbedded in the thickened surface 

 of *nme part of the frond. Grev. Alg. Brit. p. 27. t. ."> — Named 

 from lamina, a thin plate, characteristic of the frond. 



1. L. digitdta, Lamour. (digitated Laminaria ),• stipes woody cy- 

 lindrical expanded at its apex into a cartilaginous flat roundish 

 frond deeply deft into numerous ensiform mostly Bimple 



M ,, llll , llt s._.'!y. Sp. Alg- r. I. /;. \\'2. (inc. Mg. Brit. /.. 27. 



/. ;,. — Facta diaitahu, Linn. — Turn. Sgn. Fuc. p. lM»7, Hist. 

 l-nc t. L62. /:.'/><>/./. l'l'74. 



Set-shore, especially in deep water. 2J .— ■>. — i 2 i'« el or more in length, 

 (.live-brown. Occasional specimens are found with the segments con- 

 nected at the top, from which spring a new sessile frond. This is the 

 Tang or Tangle of the Scotch; Sea-girdles of the English. The young 

 frona is ovate <>r elliptical ami entire, and then much resembles ■ small 

 plant of L. sn, , inn inn. 



•2. L hnlhnsit, Lamour. (bulbous Laminaria); root hollow 

 swollen into a bulb-like form and tuberculated, stipes, plane 

 waved once-twisted at it- base, expanded into n Bat cartilagin- 

 ous oblong or rounded frond, deep!} cleft into numerous ensiform 



jments- Aq* s i K All . J - ''■ ] - /'• ' ' L ( '" r - ' /; ' /;- * 9 ' 



