concealed within the spatlie, cylindrical-oLlong, shortly stinitate, many-ovuled. 

 Capsule subglobose. Fl. April. 



Hah. Prov. Musashi : Tokyo, cult. {T. MaJcinol April and July 1902). 



This is known only in cultivation in Jai)an. 



Iris (Apogon) Rossii Baker in Gard. Chron. 1877, II. ]\ 809, et 

 Handb. Irid. p. 3 ; Maxim, in Mel. Biol. X. p. 714 ; Bretsch. Hist. bot. 

 disc, in China p. 705 ; Palib. Consp. Fl. Kor. III. p. 6. 



Iris iyoana Makino in Bot. Mag., Tokyo, XIII. (1899) p. Ill (nomen 

 tantum). 



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

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

 short rootlets. Leaves (normal) 2, erect, angustato-linear, very acuminate, 

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

 nerved, about 12-25 cm. long and 1^-6 mm. wide in flower, but attaining 

 about 45 cm. after anthesis, with 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 the leaf-tuft from the 

 top of rhizome-branches, 4-30 mm. long, gracile, enclosed with 3 or 4 

 narrow acuminate glabrous membranaceous and often purplis^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, membranaceous, not firm, glabrous, closely many-nerved, 

 viridescent, 4-6i cm. long, the lower one slightly shorter. Flower 3-4i cm. 

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

 very slender, a little enlarged towards the top, 3-6| cm. long. Sepals un- 

 guiculate ; the limb patent, elliptical or oblong-ell ii)tical, rounded at the 

 apex, acute and decurrent to the unguis below, entire, thinly membrana- 

 ceous, beardless, white with an orange centre in tiie middle of the lower 

 l>ortion, 15-20 mm. long, 8-13 mm. broad ; the unguis erect-patent, broadly 

 linear, thickish excepting the narrow membranaceous margins, brownish- 

 orange and longitudinally riilged internally, sh(jrter than the limb and 

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

 spathulato-obovate, rounded or sometimes retuso-emarginate at the apex, 

 unguiculate, thinly membranaceous, 17-22 mm. long including the unguis 

 and 6i-9 mm. wide ; the unguis narrow, shorter than the limb. Anther 

 linear, 3|-5^ mm. long, with white pollen ; filament filifoim, a little longer 



