160 [Vol. XYII. 



Observations on the Flora of Japan. 



{Continued from p. 162,) 



By 



T. Makino, 



Assistant in the Botanical Institute, Science 

 College, Imperial University of ToJcyo. 



Athyrium Fauriei (Christ) Makino. 



Neplirodium Fauriei Christ in Bull. Herb. Boiss. IV. (1896) p. 671. 



Athyrium nihkoense Makino in Bot. Mag., Tokyo, XVII. (1903) p. 43. 



Hah. Northern (JJ. FaurieK) and Middle (T. MahinoV) Japan. 



Though sori are short and resemble those of Neplirodium, this species 

 should properly be referred to Athyrium, coming near A. yoJcoscenc.e 

 (Franch. et Sav.) Christ, having a simpler frond. 



Arabis (Sisymbrina ?) Tanakana Makino, sp. nov. 



Small perennial, 3-6 cm. high in flower. Caudex ramose, branches 

 gracile, ascending, with a tuft of radical leaves at the top. Stem erect, 

 simple, gracile, thinly pubescent with white stellate hairs, with 2-3 leaves. 

 Radical leaves densely ca3spitose (the tuft l-l-Jcm. across), subspathula to-linear, 

 obtuse or acutish, gradually narrowed below, entire, rather thinly covered with 

 white stellate hairs on both surfaces and margins, 5-10 mm. long, 1-2 mm. 

 broad ; veins parallel to the midrib below ; cauline leaves remote, sessile, 

 semiamplexicaul, oblong-lanceolate to oblong-ovate, obtuse or acutish at the 

 apex, obtuse at the base, entire, 3-8 mm. long, l-i-3mm. broad. Raceme 

 short, laxly 3-10-flowered ; rachis nearly glabrous. Flower white, 4mm. 

 across, pedicellate ; pedicel erect-patent, glabrous, shorter than the flower. 

 Sepals elliptico-oblong, obtuse, concave, 3-nerved, thin, thinly pilosulate 

 on the back above. If mm. long. Petals elliptical, retaso-emarginate, 

 cuneately attenuated to a claw, subflabellately loosely nerved, 2|mm. long. 

 Stamens a little longer than the sepals ; filament filiform, glabrous ; anther 

 ova to-oval. Pistil about 2imm. long; ovary sessile, linear; style very 

 short ; stigma capitate. Siliqua (immature) linear, compressed, patent, 

 glabrous, 11mm. long, 1mm. broad, with a patent pedicel about 3 mm. in 

 length ; valves 1-nerved and loosely veined. Seeds (immature) sub-2- 

 seriate, oblong, wingless ; funicle filiform ; cotyledon accumbent. 



