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Pikea californica Harv. 



Norn. Jap, : Rlichiaueso. 

 PL CLXXXI, Fig. 1-6. 



Pikea californica Harv. Ner. Bor. Anier. II. p. 246; III. p. 131 

 tab. 49B; J. Ag. Epicr. p. 253; Id. Florid. Morph. t. 17, f. 6-10; 

 DeToni Syll. IV, p. 1631 ; Coll., Hold, and Setch. Phycoth. Bor. Amer. 

 XVIII, no. 897. Pikea? sfi. Okam. Nippon Sorui Meii (2nd., ed.i 

 p. 114. 



Fronds densely tufted rising from common scutate disc, ancipito- 

 compressed, (1-1.5 mm. in diam.). thickened below to cylindrical stipe, 

 without percurrent stem, but divided into many main segments which 

 are subdichotomo-pinnately branched, 5-10 cm. high. Branches of every 

 order widely parted, distichously disposed in an irregular manner, some 

 alternate or opposite, others subfasciculate or subsecund, with longer 

 and shorter ones intermixed without any definite order, and furnished 

 with minute simple or branched ramuli. Central axis consists of cells of 

 larger calible, from which branches arise on all sides ; of them those 

 standing on the frank give rise to the central axis of lateral branches, while 

 those on the surface-side remain short without developing to branches. 

 From the cells of axis cortical cell-filaments arise, and rhizoidal cells which 

 fill up the inner cavity of frond are abundantly produced both from 

 axial and infra-cortical cells. In growing apex terminal cells are horizontal- 

 ly articulated. fruits of both kinds unknown. Colour beautiful 

 purplish-red. Substance soft-cartilaginous and the plant imperfectly 

 adheres to paper in drying. 



Hab. : Below low-tide ; from Cape Inuboe to Kinkwasan. 



PL. CLXXXI, Fig. 1-6. Fig. I : sterile frond of Pikea californica 



