Haliseris undulata Holmes, 



Norn. Jap. ： Shiiva-yahadzii. 



PL. XI， Figs. HO.. 



Dictyopteris iindiilata Holmes New Mar. Al^r. from Japan (Linn. 

 Soc. Journ" Bot. Vol. XXXI) p. 251 PI. VI に fig. \. 一 Haliseris 

 undulata Holmes, Okam. Alg. Jap. Exsic. (岡 村， 日本海 藻標 品） 

 Fasc I， No. 41 ； 岡 村， 【】 本 藻類 名歲， P. IIO. 



Root a conical disc covered with brownish hairs, hronds, many 

 arisinp- from the same base, several times irreg^ularly clichtomous 

 with subpinnate secnnents, 10-25 cm. high. They are, when younp-. 

 provided with broader, coriaceo-membranous win 9-3 which are much 

 undulated and minutely crenulated ； when fully grown, the winp-s 

 become narrower upwards and much lacerated. The breadth of the 

 frond ranges from 10 to 15 mm. in youno-er plants while from 3 to 

 7 mm. in older ones. Segments patent, with acute axils, provided 

 with the robust prominent rachis which is stupose even beyond the 

 middle of the frond. Smaller proliferations are sometimes emitted 

 from the midrib of older segments. In an older frond the lower part 

 becomes a long, subcyllndrlcal stem, while younger ones are shortly 



stipitate. Sori are formed in do は- like or oblong groups lyinp- close 



along* both sides of the rachis of the upper portion of an older frond, 

 often becomlnp" confluent afterward. Colour olive-brown when fresh 

 with pale biuish-preen lustre under* the water, but lading" to deep 

 bluish when exposed to the air and becoming- blackish in drying. 

 Substance coriaceo-raembranous. 



Hub. On rocks between tide-marks. Common alono- the 

 Pacific coast of tnis country from Taiwan (Formosa) and Riukiu to- 

 the Cape Kinkwasan in Prov; Rikuzen ； Otaru, Tsushima. 



