132 



Hvpnea adiinca J. Ag. Collins, Hold, and Setch. P. B. A. n. 490. 



Fronds forming entangled mass on other algae, with filiform, thicker, 



or cylindrical stem or main branches, 3-4 times pinnately branched, 

 10-15 cm. high. Branches alternate, patent, rising on all sides in 



pyramidal outline. They are densely covered with short, soft, hair-like 

 ramuli. In spring, ramuli are very abundant and branches are 

 penicillate, but, later they become less numerous and rather coarse, and 

 assume somewhat comb-like appearance. Some of branches remain 

 quite naked and swell up beneath the apex forming hooks by which 

 branches entangle to each other. Ramuli are arranged in irregularly 

 alternate (not strictly decussate) pairs ; and main and lesser branches are 

 also primarily arranged in the similar manner, but one of the pair being 

 alternately suppressed, they become to assume alternate appaerance. 

 In sterile frond, ramuli are alternate, but in fertile ones reproductive 

 organs are formed on one of the pair. Tetraspores unknown. 

 Antheridia oblong, shortly pedicelled. Cystocarps ovato-globose or 

 globular, shortly stipitate. Colour purplish-red often fading to yellowish. 

 Substance soft and the plant closely adheres to paper in drying. 



Hab. : entangled on various algae between tide marks and below 

 low tide; rather common from Prov. Awa to Hakodate. 



Present plant which was put under Bonneinaisonia by Hariot is 

 indeed Asparagopsis, as one can see from its filiform and penicillate 

 branches and structure of frond. 



PI. CLXXXIII, Fig. 10-11. Fig. 10: cystocarpic frond of 

 4sparagopsis Inimifeni (Hariot) Okam., \. Fig. 11 : branch bearing 

 cystocarps, ^. 



PI. CLXXXIV, Fig. 10-16. Fig. 10 : longitudinal section of branch, 

 magd. Fig. 11 : cross-section of branch (from herbarium-specimen) magd. 

 Fig. 12: apex of main branch; a, apical cell; 211. Fig. 13: ramuli 



