85 



Thorea ramosissima Bory. 



Nom. hp. : Cliisiiji-Hori. 

 PL. CLXXI, Fig. 1-5. 



Thorea ranfsissima Bory ; Engl. u. Prantl, Die nat.-Pflanzenfam. p. 324, 

 rig. 198. -Kg. Phyc. gener. p. 326, t. 16, f. I ; Id. Sp. Alg. p. 534 ; Id. Tab. 

 Phyc. VII, t. 90, f. II.- Moeb. in Ber. d. deutsch. hot. Ges.: IX. (1891). p. 338, 

 t. XXII, f. 7-14. W. Schmidle, Unters. ii. Thorea ramosissimn Bory (Hod- 

 wigia Band XXXV, 1896) De Ton! Syll. Alg. III. p. 587, IV, p. 33. 



Fronds filiform, very s >ft, slimy and flaccid, abundantly branched 

 on all sides in twice pinnate manner from the base, with longer and 

 shorter branches mixed, 250-300 />. thick, gradually tapering upward and 

 the plant attains 10-45 cm. or more in length. Hair measures 500-700 /< 

 in length, and 56 , in thickness, and the articulations 2-3 times long as 

 broad or more ; the thickness of fusiform part of basal portion of hair 

 measures about 11 ,. Colour dark violet. Plant closely adheres to paper 

 in drying. 



Hab. : Freshwater alga growing on pebbles in quickly running rivulets. 

 Prov. Ohsumi and Ryukyu. Dec. -March. 



PL. CLXXI, Fig. 1-5. ig. 1 : fronds of Thorea ramosissima Bory, 

 \. Fig. 2: surface-view of fr>>.iJ showing the hairs spreading out by the 

 pressure of cover-glass, and monospores, Jj 3 -. Fig. 3 : cross-section of a 

 sterile branch, magd. Fig. 4: one of cortical filaments detached, magd. 

 Fig. 5: cortical filament showing hairs, monospores, and rhizoids, ' ; y. 



PL. CLXXI CLXXV, March, 1921. 



