Tili: Il ('A( i;.K Ol' .lAI'AX. lil 



liavo a tliiril form nioic w less well (leCnied, wliicli will \)c 

 reniarkeil ii[)on with llie others below. 



/'. ff/jn'((( lorm. ii(»v. l'lalc I. Fi<^. 4. 



Diagnosis. Fronde lato-linoaii ooiuphinatii decomposite dichotoma ramosis- 

 sinia ; ve!>ieulis nornialiter millis; receptaculis lanceolatis compresso- 

 lurgiilis terniiiuilibus. 



= Fiicus Wrightii Jl\i;v.: Cliaracl. of New Wy:. ]>. .'>2.S. — J)i; Tom: 



Svll. AI-. III. p. 201).— /f/.: riiyc. Jap. Nov. j). 4S. 

 ^Fductia Wrightii Oka.m.: I'^mmer. Al<r. of Jap. p. lo8. — Ykxdo: 

 IVelini. Lust of Jap. Fiie. ]>. läl. 



The original diagnosis of Fucus Wrightii was based on a sterile 

 s])eeimen so that a little additional description will not be superHiious. 



The frond is tereto-co m pressed, linear, decomposito-diclioto- 

 mously branched, with the axils generally acute. The stem is 

 subcylindrical and extremely short, measuring hardly one centi- 

 meter in length. It starts from the top of a comparatively small 

 disc-shaped root. Occasionally it bifurcates into two branches 

 before attaining a percej^tible length, thus giving the appearance 

 of two fronds starting from the same root. A frond, when fully 

 grown, attains o feet in length with copious fastigiate l)ranches. 

 The internodal segments are linear varying from li cm. to 10cm. 

 in length, more or less broadened upward, and with no sort of 

 midrib. The sterile terminal segments are linear, truncated or 

 bifurcated at the apices, each pair being parallel, lleceptacles 

 ai-e limited to the terminal segments of the branches. They are 

 mostly simple but frequently are bifurcated with wide angles. 

 ^\'hile yet very young they are tlat and lanceolate but gradually 

 swell up, at the same time increasing in general size. The 

 l>lant is hermaphrodite and antheridia and oogonia are found in 

 the same conceptacle. The conceptacles have bushy hairs which 

 extrude from the mouth. 



