IDS 



Hub.: Riishiri (Faurie, Herb. Mus. Paris no. 9732, leg. 

 Harlot), Mashike, Zenibaco, Fukuyama, Hakodate (Hokkaido) ; 

 Naoyetsu, Kujiranami, Aomigawa (Prov. Echigo). Fruits : late 

 spring to summer. 



A very distinct and handsome species closely allied to P. 

 urceolata Harv., as Harvey remarks in Harv. l.c, but the ramifica- 

 tion is very different. I have studied a specimen of this species 

 from Prof. Farlow's Herbarium kept in the herbarium of Tokyo 

 Imp. Univ. which is found with stichidia forming clusters in the axils 

 of ramuli as it is natural for this species. Kiitzing's illustration 

 which shows tetraspores borne in usual ramuli instead of in the 

 ramelli standing in the axils of ramuli is at variance with our 

 observations. 



PL. CXXVII, Fig. i-S. Fig. 1 : portion of the frond of 

 Polysiphonia Morrowii Harv., in nat size. Fig. 2 : branch bearing 

 stichidia, ". Fig. 3 ' cross-section of branch, magd. Fig. 4-: 

 ramulus or pinnulus, 5 1 4 . Fig. 5 : stichidial ramelli arising in a 

 cluster from the axil of a ramulus, ^ 4 . Fig. 6 : two stichidia in 

 lateral and ventral views, ^. Fig. 7 : cystocarpic branch, *^. Fig. 

 8 : cystocarp, -, 



Polysiphonia Greville. 1824. 



^ i C 3 A. 

 RHODOMELACEAE. .& Jt O & 



3t >**&* IB 



tt A -y, Bl 

 t * /h b ^-^^igBliil-^ajS* -^ ^ 0! 



