1903/ 



OBSERVATIONS ON THE FLORA OF JAPAN. 151 



Iris (Apogon) Rossii Ba1:er in G;ird. Cliron. 1877, II. p. 809, et 

 llandb. IriJ. p. 3 ; :\[axiin. in Mel. Biul. X. p. 714 ; Bret^;ch. Hist. Lot. 

 disc, in China p. 70.") ; Palib. Consp. FI. l\o\: III. p. 6. 



Iris ii/oana Makino in But. Mag., Tokyo, XIII. (1899) p. Ill (nomen 

 tantum). 



Small, densely tufted ; rhizome slender, shortly creeping, branched, hard, 

 densely covered witii splitting fibres of old leaves ; roots filiform, hard, with 

 short rootlets. Leaves (normal) 2, erect, ;ingustato-!lnear, very acuminate 

 gradually attenuated below, thin and grass-like in texture, glabrous, 2-.3- 

 nerviid, about 12-25 cm. long and U-G mm. wide in flower, but attaining 

 al)(iut 45 cm. after anthesis, v^'ith few narrow acuminate membranaceous 

 and often purplish vagina-leaves below. Scape 1-headed, 7-15 cm. high 

 including the flower, erect, arising at the side of tlie leaf-tuft from the 

 t('[) of rhizome-branches, 4-30 mm. long, gracile, enclosed with 3 or 4 

 narrow acuminate glabrous membranaceous and often purpli-h sheaths, 

 the uppermost sheath larger and attaining about 5 cm. in length ; pedicel 

 gracile, 10-32 mm. long. Spathe 1-flowered ; valves 2, linear-lanceolate to 

 linear, acuminate, membrauaceous, not firm, glabrous, closely many-nerved, 

 viridescent, 4-61 cm. long, the lower one slightly shorter. Flower 3-41 cm. 

 across, violet, sometimes light violet, rarely white. Perianth-tube long and 

 very slender, a little enlarged towards the top, 3-G.| cm. long. Sepals mi- 

 guiculate ; the Ihnh ])atent, elliptical or oblong-elliptical, rounded at the 

 a])ex, acute and decurrent to the unguis below, entire, thinly membrana- 

 ceous, ])eardless, white with an orange centre in tiu; middle of the lower 

 portion, 1,3-20 nun. long, 8-13 mm, bro;id ; the unguis erect-patent, broadly 

 linear, thickish exc.-[)ting the narrow membranaceous magins, brownish- 

 orange and longitudinally ridged internally, shorter than the limb and 

 7-9 mm. long. Petals erect-patent, shorter than the sepals, obovate, or 

 spatl)ulato-obov;ite, rounded or sometimes retuso-emarginato at the apex, 

 unguiculate, thinly membranaceous, 17-22 mm. long including th(i unguis 

 and 61-9 mm. wide; the unguis narrow, shorter than the limb. Anther 

 linear, 3^-51 mm. long, with white pollen; filam:-nt filiform, a little longer 

 than the anther. Style long, filiform; style-branches suberect, one-half as 

 long as the sejtais, subsagittato-truncate at the base, linear-rectangular, about 

 3 mm. widp, thin, in centre with 2 close narrow and longitudinal Iamella3 

 which are becoming into tlie crest-lobes above ; crest-lobes erect, linear- 

 lanceolate, obtuse or acute, thin, 4-8 mm. long ; stigma short, semiorbicular. 

 Ovary oblong, subtrigonous, glabrous, stipitate, about 4i mm. long ; stipe 

 7-9 mm. long. Ca'/sule globose, about 7 mm. across. Fl. April. 



