378 62. Gigart. 2. THALASSIOPHYTJE. Pl.cell.aph. 
Sea-shore, or submarine stones or rocks. 
Thallus 1 to 3 inches high, more or less compressed, 
flattened. 
XXXVIII. 63. GASTRIDIUM. Lyngbye. Belly-weed . 
Thallus threadlike, round, tubular, gelatinous, cartila- 
ginous ; tubercles roundish, lateral or terminal ; sporidia 
in the tubercles and also on the twigs. 
a. Lauren tia. Thallus compressed ; tubercles terminating 
the twigs. 
1 . Gastridium pinnatifidum. Feather-cut belly-weed . 
Thallus compressed, cartilaginous, branched ; branches 
mostly alternate, doubly pinnatifid; twigs blunt, callous. 
Fucus Dealensis pedicularis rubri folio, Dillen in Rail Syn. 48,37. 
Fucus ramosus pi peris sapore, Dillen in Raii Syn. 51, 55. 
Fucus pinnatifidus, Huds. FI. Ansi. 581 ; Engl. Rot. 1202 ; Turn. Hist. 
20 . 
Fucus multi fid us, Hudson , 581. 
Fucus corymbifcr, Wulff. Crypt. 32. 
Fucus cbrymbiferus, Esper , 94. 
Laurentia pinnatifida, Lamour. Thall. 
Chondria pinnatifida, Agardh Syn. 35. 
Gelidium pinnatifidium, Lyngbye Hydr. Dan, 40. 
Pepper dulse. Faminkiren , Ireland. 
Sea-shore; annual; autumn. 
Thalli aggregate, yellowish red, diaphanous; taste hot, 
acrid. 
Q.filicinum. Thallus roundish; twigs cylindrical, thick- 
ened upwards, clustered, mostly simple. 
Fucus Osmunda, Nereis Brit. 46. 
Fucus filicinus, Lightf. Scot. 954, not of Hudson. 
y. angustum. Thallus compressed; twigs clublike, crowd- 
ed, mostly simple. 
£. tenuissimum. Thallus compressed ; twigs divaricated, 
branches very slender. 
2 . Gastridium obtusum. Blunt belly-weed. 
Thallus cartilaginous, cylindrical, threadlike, repeatedly 
pinnated; branches generally opposite; twigs cylindrical, 
short, spreading, blunt. 
Fucus obtusus, Huds. FI. Angl. 586 ; Engl. Bot. 1201 ; Turn. Hist. 21. 
Fucus spinosus, Wulf. in J acq. Coll. 3, 156. 
Laurentia obtusa, Lamour. 'Thai. 
Chondria obtusa, Agardh Diss. 18. 
