PI. cell. aph. 2 . T H A L A S S I O P H Y T /E . 76. Mackaia. 393 
Fucus granulatus, Lin. S. P. 1629 ; Engl. Hot. 2169. 
Fucus inucronatus, Turn. Syn. 73; Hist. 251. 
Fucus radicaulis, Wither. Bot. Arr. 4, 111. 
Sea-shore; perennial; Feb. and August. 
6. Mackaia ericoides. Heathlike mackay . 
Thallus cylindrical and naked at bottom ; branched at 
the tip; branches variously divided, long; twigs mostly 
simple, avvlshape, imbricate, spreading; vesicles roundish. 
Fucus foil Ls ericae seu tamarisci, Rnii Syn. 49,44. 
Fucus ericoides, Lin. S. P. 1631 ; Engl. Bot. 1968 ; Turn. Hist. 191. 
Fucus tamariscifolius, Huds. FI. Angl. 576. 
Fucus Erica marina, Gmcl , 128. 
Fucus selaginoides, Lin. Mtint. 134. 
Sea-shore; perennial; summer. 
Thallus reflects bright tints when in a growing state. 
LII. 77. BACCALARIA. Gulf-weed. 
Thallus distinct as to its parts ; holdfasts shieldlike; stirps 
threadlike, much branched; branches mid-ribbed, mem- 
branaceous, often pierced with holes, dilated at- the tip, 
edges serrate; vesicles spherical, peduncled, awnless or end- 
ing in a round or dilated awn ; sporidia in roundish thecae 
intermixed with jointed fibres immersed in axillary, soli- 
tary or racemous apothecia. 
1 . Baccalaria natans. Floating gulf-weed . 
Thallus compressed, bipinnated ; branches alternate, 
simple ; twigs linear, lanceolate, serrated ; vesicles spheri- 
cal ; peduncles flat; apothecia cylindrical, racemose. 
Fucus natans, Lin. S. P. 1628 ; Engl. Bot . 2114; Turn. Hist. 46. 
Sea-shores; perennial; summer. 
Thallus alternately bipinnate, twigs blunt, smooth. 
2. Baccalaria teres . Cylindrical gulf-weed. 
Thallus cylindrical, threadlike, bipinnate; branches al- 
ternate, mostly simple; twigs linear, serrated ; vesicles sphe- 
rical; peduncles cylindrical. 
Fucus natans, Huds. FI. Angl. 572. 
Fucus bacciferus, Turn. Syn. 55; Hist. 27 ; Engl. Bot. 196T. 
Sea, floating in large masses ; perennial ; winter. 
3. oblong ifolius. Twigs oblong, blunt, large toothed. 
