― 42 ― 



—部， 4: 枝 ノ撗斷 面， 廓 大.一 5: 皮層 絲/— 片-シ テ根樣 絲ヲ示 

 ス， 廓 大.一 6 ： 皮 r# ノー 部， 6 ?0.— 7 ： 皮層 絲ノ 一部 二 精子 器ノ集 マレ 

 ノレ 狀, 8: 幼 キ胎原 列 ヲ 背面 ョ ジ見 タノ レモ ノ， 巧ぶ.一 9: 方サ 



受 胎ヲ 終〜 タ ノレ 胎 心 細 胞， も， 



Enantioclaaia latiuscuia (Harv.) Okam. . 



. Norn. Jap, ； Ai-somt-gusa. 



PL. IX, Fig. I ； PL. X， Figs. 1-17. 



Rytiphloca latiuscuia Harv. in Gray's List of Jap. Plants, p. 331, 

 No. 4. 



Plant solitary, probably arisino- from a widely spreading* disc, 

 with subcylindrical branched stem which is formed by a thick 

 cortication of older basal portion of frond, 10-20 cm. hip"h. Main- 

 branches, many of which arising from the stem, with narrowed bases, 

 broadly linear, 2-3 mm. in breadth, piano-compressed, two to three 

 times pinnate in regularly opposite and distichous manner. Branches 

 patent, standinp- almost horizontally below, becomino- erecto-patent 

 above, with rounded axils. Lower pinnae of main-branches remain 

 more or less short, often reduced to mere deltoid teeth or short 

 pointed branches, the middle ones lonp'est and similarly pinnated, 

 o-radually decreasin!7 in length above, so that the ramification is some- 

 what triano-ular. Branches of every order are furnished with deltoid 

 teeth which are ultimate branchlets of imperfect o-rowth, and are in- 

 rolled at apical portion towards the ventral surface. They are all 

 furnished with faint immersed midrib. Often secondary branches or 

 branchlets proliferate from the ventral surface of frond. All the 

 seoments are furnished in their incurved terminal portion with a 



