July 1912.] T. 3IAKIN0.- OBSERVATIONS ON THE FLORA OF JAPAN. 209 



or oval-elliptical, rounded or rounded-obtuse at the apex, 

 obtuse at the base, quite entire, herbaceous, thickly mem- 

 branaceous, smooth, glabrous, thickish towards the straight 

 midrib, green, not h^'aline on margin, 13—21 mm. long, 6—11 

 mm. broad, penninerved with lateral veins which are connect a 

 broad middle costa and the marginal nerves ; lateral viens 

 numerous and about 16-18 on each side, distinct, spreading 

 (sub-erect-patent), subclosely parallelly arranged, simple and 

 bifurcate at the base ; the upper ones hardly arcuate upwards, 

 the middle ones sub-straight, and the lower ones hardly arcuate 

 downwards, the branches of the bifurcate vein sometimes again 

 connate or one of them connate to the neighboring one, the 

 area limited by two veins broadly linear ; the marginal nerve 

 truly marginal but the upper portion very scarcely intramar- 

 ginal, or sometimes entirely' slightlj' intramarginal ; petiole 

 shorter or longer than the lamina, slender, glabrous, purpuras- 

 ccnt as well as the very base of the lamina, not dilated at the 

 base, slightly short-dilated under the lamina and about I3 mm. 

 wide, |— 3| cm. long ; scales 2, short, placed at the node, 

 spuriously opposite, vaginate, inner 1 (Fig. XV. a) condupli- 

 catel}^ enclosing the base of petioles and 1-nerved, outer 1 (Fig. 

 XY. b) amplexicaul above the node and sub-3-nerved, any one 

 thinh^ membranaceous, hyaline, broad, transversely elliptical, 

 emarginate at apex, 5—6 mm. long. Flowers 



Nom. Jap. 0-umihirumo (nov.), Utni-koban (nov.). 



Hab. Prov. Awa in Shikoku : Shishikui in Kaifu-gori (D. 

 Nikail herb. Sc. Coll. Imp. Univ. Tokyo, Aug. 22, 1906). 



(Distrib.) Isl. Pratas (T. Kawakawi I June 1908). 



This species differs from Halophila ovalis Hook. fil. and 

 H. ovata Gaud, in having the broader and thicker leaves, mar- 

 ginal or sub-in tramarginal nerves, numerous and closely ar- 

 ranged lateral veins, and purpurascent petiole. 



Halophila ovalis (R. Br.). Hook. fil. Fl. Tasm. H. p. 

 45 ; Miq. Fl. Ind. Bat. HI. p. 230 ; Boiss. ' Fl. Orient. V. p. 

 2'; Benth. Fl. Austral. YII. p. 182 ; Aschers. ' in Nuor. Giorn. 



