— 58 — 



1 5-20 cm high, ic-25 mm broad. Segments provided with immersed 

 Hattish midrib, lower portion of which becomes more or less 

 prominent nnd stupose for a short distance. Cryptostomata densely 



scattered over the surface of a young- frond. Sori formed on the 



upper portion of an older frond in minute oval groups arranp-ed in 

 oblique rows from the both sides of the midrib. Colom' olive-brown. 



Hah, •• On rocks between tide-marks. Cape Iwai in the Prov. 

 RiKuzen, Hakodate. Sorus : ― Summer. 



The present plant shows an affinity on the one hand with 

 Haliseris polypodioides ( Desf.) Ag. and on the other, with n, undu- 

 lata Holm., on account of its way of ramification. It, however, differs 

 from both of them chiefly on the arrangement of sori, and in the. 

 system it will be placed next to H . iindulata Holm. 



PL. XIII, Fig. 1-3. ncr. 1 : young fronds of Haliseris divaricata 

 from the Cape Iwai in the Prov. Rikuzen. ト, 一 Fig. 2 ： fully grown 

 frond bearing- sori, from Hakodate, \ . — rw, 3 : surface-view of a 

 sorus and a cryptostoma, ca. ぜ、 



PL. XIV， Fig. 5. Fig. 5: longituainal section cut throucrh a 

 cryptostoma, - -—. ' 



Haliseris divaricata Okam. 新 種. 

 ゑぞゃ は づ 岡 村 稱. 



第 XIII 圖版， 1-3 圖； 第 XIV 圔版， 5 圖. 



體ハ掲 色ノ毛 葺ヲ被 ムレ フレ圓 錐) 付着 器 ヨリ 叢生 シ， 老成 

 セ ノレ モノ 、基部 ヲ除ク 外ハ楚 ヲ有ス ノレ コト ナク， 濶キ膜 狀ニシ 

 ラ， 稍 不規則 二 叉狀ニ 分岐 シ， 所 々稍 羽 狀-出 タノ レ枝ヲ 有 'ン, 枝 



