IRIS 



IRIS 



1675 



this group. Said to have been intro. from Constanti- 

 nople in 1753. Name from a city in Persia. Not 

 entirely hardy N., but a good pot-plant. Var. major, 

 Hort. Bluish, tinted brown. 



51. Bismarckiana, Damman (/. nazarena, Hort. /. 

 Sari var. nazarena, Foster). Habit of /. susiana, and 

 fls. as large: Ivs. 8 in. long: st. 12-18 in. high: outer 

 segms. orbicular, yellowish, densely spotted with pur- 

 ple-brown, with a dark purple-brown spot at the end 

 of the beard; inner segms. orbicular, short-clawed, 

 sky-blue from numerous blue veins on a creamy white 

 ground. N. Palestine. B.M. 6960 (as /. Sari var. 

 lurida); 7986. R.H. 1902, p. 405. J.H. III. 56, p. 497 

 (as /. Sari var. nazarensis). I.H. 42, p. 78(?). Gt. 42, 

 p. 487; suppl. pi. G.M. 40:250. 



SUBGENUS PARDANTHOPSI8. 



52. dichotoma, Pall. Rhizome slender: Ivs. 6-8 in a 

 fan-shaped cluster, 8-12 in. long, 1^4 in. wide: st. 2 ft. 

 high, much branched, bearing 6-10 heads: spathes not 

 over Hin. long, scarious, 3-5-fld. : fls. fugitive, opening 

 only in the afternoon, twisting spirally when wither- 

 ing; outer segms. with a subquadrate blade contracted 

 into a broadly cuneate claw, whitish, spotted with 

 lilac-purple; inner segms. spreading, oblong-unguicu- 

 late, whitish and light purple. August. Irkutsk and 

 Transbaikalia to Manchuria and China. B.M. 6428. 

 B.R. 246. Although the fls. last only a few hours, 

 they are produced in great profusion so that usually 

 4-6 are open at the same time. 



SUBGENUS APOGON. 



A. Lvs. linear, generally less than 



broad. 



B. Lf. -sheaths splitting into fibers. 

 c. Spathe-valves green. 



D. Tube of the perianth evident, 

 usually more than %in. long. 

 E. St. with 1-2 long Ivs. imme- 

 diately below the spathe .... 53. 



EE. St. bearing a reduced If. and 

 springing from a pair of 

 reduced Ivs. at the base ..... 54. 



EEE. St. sheathed by 1-2 narrow 



reduced Ivs ............... 55. 



DD. Tube of the perianth short or 

 obsolete, usually less than 

 %in. long. 

 E. Fls. yellow. 



F. St. wiry, with a single 

 sheathing If. low down ..... 56. 



FF. St. slender, bearing 2 



lanceolate sheathing Ivs. ...57. 



FFF. St. hollow, bearing a much- 

 reduced If. near the mid- 

 dle ................... 58. 



EE. Fls. some shade of blue or 



white. 

 F. St.-lvs. long, usually over 



1 ft. and exceeding the st.. 59. 

 FF. St.-lvs. reduced. 



G. Rhizome slender: Ivs. 

 pink at base ......... 60. 



GG. Rhizome stout, compact. 



H. Caps, long, narrow. . .61. 

 HH. Caps, fusiform taper- 



ing at both ends ..... 62. 



CC. Spathe-valves scarious only in the 



upper part or along the edges. 

 D. Inner segms. suberect, extended 

 obliquely .................. 63. 



DD. Inner segms. erect, connivent.. . . 64. 



ccc. Spathe-valves entirely scarious. 



D. St. hollow ................... 65. 



DD. St. solid .................... 66. 



BB. Lf. -sheaths not splitting into fibers. 



humilis 



ruthenica 

 macrosiphon 



Hartwegii 

 Grant-Duffii 



Wilsonii 



graminea 



tenax 

 ensata 



longipetala 



Delavayi 

 sanguinea 



sibirica 

 prismatica 



c. St. nearly obsolete 67. unguicularis 



cc. St. present; clothed with sheathing 



bracts. 



D. Perianth-tube short, funnel- 

 form 68. bracteata 



DD. Perianth-tube slender, as long as 



the ovary 69. Sintenisii 



CCC. St. present, bearing 1-2 Ivs. 



D. The Ivs. purplish at base: st. 



scarcely overtopping the Ivs. . . 70. Douglasiana 

 DD. The Ivs. not purplish at base: st. 



much exceeding the Ivs 71. missouriensis 



AA. Lvs. ensiform, generally much over 



%in. broad. 

 B. Plants large. 



c. St. bearing several long Ivs. 



D. Fls. reddish brown 72. fulva 



DD. Fls. yellow 73. Pseudacorus 



ODD. Fls. blue, purple, or lilac to 



white. 

 E. Inner segms. at least half as 



long as the outer. 



F. The Ivs. somewhat glaucous 74. vesicolor 

 FF. The Ivs. green, not glaucous. 

 G. Outer segms. 3-4 in. 



long; fls. sessile 75. hezagona 



GG. Outer segms. 2^-3 in. 



long; fls. pedicelled. . . .76. caroliniana 

 EE. Inner segms. minute, setose. .77. setosa 

 cc. St. bearing 2-4 reduced Ivs. 

 D. Fls. yellow. 



E. Outer segms. with an orbicular ' 



blade. 

 F. Plants tall, 2-3 ft. or more: 



fls. without veins or spots.78. Monnieri 

 FF. Plants smaller, scarcely ex- 

 ceeding 1^4 ft- : outer 

 segms. faintly veined on 



the claw 79. halophila 



EE. Outer segms. with an obovate 

 blade; fls. white and pale 



yellow 80. orientalis 



EEE. Outer segms. with an oblong 



blade; fls. golden yellow. . . .81. aurea 

 DD. Fls. blue, purple, lilac or white. 

 E. Seeds orange-red or scarlet: 



fls. inconspicuous 82. foetidissima 



EE. Seeds brown: fls. showy. 



F. Sts. bearing several lateral 

 spicate heads below the 



terminal one 83. spuria 



FF. Sts. bearing a terminal head 

 and often a stalked lateral 



head 84. lae vigata 



BB. Plants dwarf 85. verna 



53. h&milis, M. Bieb. (7. ruthenica, Ker ex parte). 

 Rhizome wide-creeping: Ivs. linear, up to 12 in a tuft, 

 glaucous, 6-12 in. long: st. not more than 1-1 ^ in. 

 long, bearing 2 long Ivs. immediately below the spathes: 

 spathe 1-fld.; outer segms. with a suborbicular blade 

 and a long cuneate claw, deep blue-purple with deeper 

 veins, whitish on the throat, with deep purple veins; 

 inner segms. oblanceolate, unguiculate, blue-purple. 

 Caucasus to Georgia and Hungary. Gn. 10, p. 379. 

 Distinguished from /. ruthenica by the 2 long Ivs. 

 which arise below the spathe and are 2-3 times as long 

 as the latter. 



54. ruthenica, Ker. Lvs. linear, in crowded tufts, 

 6 in. long at flowering-time, becoming 12 in. long: 

 st. slender, 1-8 in. long, but often obsolete; 1-headed: 

 pedicel J^-2 in. long: tube twice as long as the ovary; 

 outer segms. with an oblong blade rather shorter than 

 the claw, lilac, veined and dotted with bluish purple on 

 a whitish ground near the center and lower part of the 

 blade; inner segms. lanceolate, with narrow claws, 

 deep purple-violet. April, May. China, Siberia and 

 Cent. Asia. B.M. 1123, 1393. Gn. 50, p. 187. G.W. 

 15 : 132. Violet-scented. 



