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 (/. nazarhia, Hort. /. 

 Sari var. nazarena, Foster). H^^bit 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. nazaren^s). I.H. 42, p. 78(?). Gt. 42, 

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



SOBGENUS PARDANTH0P8IS. 



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

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

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

 over J/2in. 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 segnis. 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 l-^in. 

 broad. 

 B. Lf. -sheaths splitting into fibers. 

 c. Spathe-valves green. 



D. Tube of the perianth eirident, 

 usually more than l^in. long. 

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

 diately below the spathe. . . .53. humilis 

 EE. St. bearing a reduced If. and 

 springing from a pair of 



reduced lvs. at the base 54. ruthenica 



EEE. St. sheathed by 1-2 narrow 



reduced lvs 55. macrosiphon 



DD. Tube of the perianth short or 

 obsolete, usually less than 

 }^2in. long, 

 E. Fls. yellow. 



F. St. wiry, with a single 



sheathing If. low down 56. Hartwegii 



FF. St. slender, bearing 2 



lanceolate sheathing lvs. ...57. Grant-Dufl&i 

 FFF. St. hollow, bearing a much- 

 reduced If. near the mid- 

 dle 58. Wilsonii 



EE. Fls. some shade of blue or 

 white. 

 F. St.-lvs. long, usually over 



1 ft. and exceeding the st..59. graminea 

 FF. St.-lvs. reduced. 



G. Rhizome slender: lvs. 



pink at base 60. tenax 



GG. Rhizome stout, compact. 



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

 HH. Caps, fusiform taper- 

 ing at both ends 62. longipetala 



cc. Spathe-valves scarious only in the 

 upper part or along the edges. 

 D. Inner segms. suberect, extended 



obliquely 63. Delavayi 



DD. Inner segms. erect, conniveni.. . .64. sanguinea 

 ccc. Spathe-valves entirely scarious. 



D. St. hollow 65. sibirica 



DD. St. solid 66. prismatica 



BB. Lf. -sheaths not splitting into fibers. 



c. St. nearly obsolete 67. unguicularis 



cc. iS7. 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 lvs. 



D. The lvs. purpli.'ih at tjase: st. 



scarcely oniiopiiinn the lvs. . . 70. Douglasiana 

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



much exceeding the lvs 71. missouriensis 



AA. Lvs. ensiform, generally much over 

 l/^in. broad. 

 B. Plants large. 



c. St. bearing several long lvs. 



D. Fls. reddish brown 72. fulva 



DD. Fls. yellow 73. Pseudacorus 



DDD. Fls. blue, purple, or lilac to 

 white. 

 E. Inner segms. at least half as 

 long as the outer. 

 F. The lvs. somewhat glaucousli. vesicolor 

 FF. The lvs. green, not glaucous. 

 G. Outer segms. 3-4 in. 



long: fls. sessile 75. hexagona 



GG. Outer segms. 2J-2-S in. 



long: fls. pedicelled. . . .76. caroliniana 

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

 cc. *S(. bearing 2-4 reduced lvs. 

 D. Fls. yellow. 



E. Outer segms. with an orbicular 

 blade. 

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



fls. without veins or spots.7S. Monnieri 

 FF. Plants smaller, scarcely ex- 

 ceeding 1}-^ 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. laevigata 



BB. Plants dwarf 85. verna 



53. hfimilis, M. Bieb. (/. ruthenica, Ker ex parte). 

 Rhizome wide-creeping: lvs. hnear, up to 12 in a tuft, 

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

 long, bearing 2 long lvs. 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 lvs. 

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

 as the latter. 



54. ruthenica, Ker. Lvs. Uncar, 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 ^:4-2 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. 



