﻿PLATE XIII. 



Neurymenia fraxinifolia (Mert) J. Ag. 



AMANSI/E ( Rhodomelacese). 

 Nom, Jap. IsO'basho. 



Neurymenia fraxinifolia J. Ag. Sp. Alg. II， p. 1 1 3 5 ； Schmitz u. 

 Falkenberg in Engler u. Prantl's Naturl. Pflanzenfam. p. 471. — Dictyomenia 

 fraxinifolia Harv. Phyc. Austr. tab. CXXIV. — Epineuron fraxinifolium Kiitz. 

 Sp. Alg. p. 849. — Fitcus fi-axinifolius Mert. Turn, Hist. Fuc. tab. 193. 



Root a broad disc. Frond leaf-like, linear-oblong, simple or 

 pinnately lobed, with a prominent midrib and parallel veins, 

 furnished below with a cylindrical stem which varies in length 

 and tnickness according to age of the plant. The plant branches 

 by producing similar segments repeatedly from both surfaces of 

 the midrib. In specimens before us, the frond attains 10-20 cm. 

 in height. As the frond grows in age, lamina of the primary 

 leaf becomes decayed and the midrib is transformed into stipe. 

 Thus the plant may have simple or branched stem. Lamina 

 linear-oblong, 10-15 cm . long", 10-1 7 mm. broad, very obtuse at 

 bases, eniar^inated and rounded at apices, slightly undulated, 

 serrated throughout, midribbecl and closely penninerved with 

 slender, patent viens. Veins scarcely observable to naked eyes, 

 obliquely ascending alternately from the midrib to marginal teeth, 

 parallel in a short regular distance ； upper veins curve at emargi- 

 nated lobes and converge to each other. Marginal teeth are 

 spinose ana branched with subulate and recurved ramuli ； similar 

 processes ^simple or branched) also arise along veins and midribs, 

 and consequently the surface of lamina is generaly rough. Cysto- 

 carps unknown. Stichidia are lanceolate or linear, acute, shortly 



