824 



IRIS 



IRIS 



ccc. Stem present, bearing 1-2 



leaves ................. 15. 



16. 

 AA. Lvs. ensiform, generally much 



over % in. broad. 

 B. Stem bearing several long 



leaves. 

 c. Fls. reddish brown ....... 17. 



cc. Fls. yellow .............. 18. 



CCC. Fls. blue, purple, lilac, 



etc., or white. 

 D. Lvs. somewhat glau- 

 cous ................. 19. 



DD. Lvs. bright green, not 



glaucoiis. 

 E. Fls. sessile ........ 20. 



BE. Fls. pedicelled ..... 21. 



22. 



BB. Stem bearing 2-4 reduced Ivs. 

 c. Fls. yellow .............. 23. 



24. 

 25. 

 26. 

 CC. Fls. some shade of blue or 



ivhite .................. 27. 



28. 

 29. 

 30. 



Missouriensis 

 Douglasiana 



fulva 

 Pseudacorus 



versicolor 



hexagona 



Caroliniana 



setosa 



Guldenstoedtiana 

 aurea 

 Monnieri 

 orientalis 



f oetidissima 

 laevigata 

 Trojana 

 spuria 



1. humilis, M. Bieb. (/. Jfftt^mca,Ker.,notDryand.). 

 Rhizome wide-creeping : Ivs. to 12 in a tuft, glaucous, 6-12 

 in. long: fls. bright lilac; outer sepals with asuborbicu- 

 lar blade and a long cuneate claw. Caucasus to Geor- 

 gia and Hungary. Gn. 10, p. 379. 



2. macrosiphon, Torr. Plants rather dwarf, 6-12 in. 

 high : Ivs. grass-like, green, 12 in. long, exceeding the 

 fls.: stem 3-6 in. long: pedicels very short: outer seg- 

 ments obovate-cuneate, undulate, pale yellow to cream, 

 with a network of brownish crimson or bright lilac 

 veins ; inner segments rather small, colored like the 

 outer. Free-flowering. Calif, and Ore. Gn. 52, p. 126. 

 Torrey says the fls. are bright lilac and the Ivs. less 

 than 4 lines wide. 



3. Hartwegii, Baker. Lvs. few (2 ) , 6-12 in. long, finely 

 veined : stem 6 in. long, with linear leaf low down : pedi- 

 cel 1-1 % in. long : limb pale yellow : outer segments with 

 a,n oblong blade, shorter than the claw. Calif. Rarely 

 cult. 



4. Grant- Duffii, Baker. Lvs. about 1 ft. long: stem 6 

 in. high, with about 2 Ivs., outer valves marked with 

 fine black lines: outer segments with a yellow blade, 

 much shorter than the claw ; claw veined with lilac on a 

 yellowish white ground. Palestine. Gt. 42, Supp. PI. 

 Not valuable commercially. 



5. Ruthenica, Dryand., not Ker. Lvs. 3-12 in. long, 

 in crowded tufts : stem slender, 3-6 in. long, but often 

 obsolete: tube twice as long as the ovary: outer seg- 

 ments with an oblong blade rather shorter than the claw, 

 lilac, violet scented. Apr., May. China, Siberia and 

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



6. tdnaz, Dougl. Sheaths short: Ivs. 6-12 in. long: 

 stem 6-12 in. long: pedicel long: outer segment broadly 

 obovate, with an acute point : blade about as long as 

 the claw, bright lilac, with purple veins and a varie- 

 gated white and yellow spot on the throat : inner seg- 

 ments shorter, waved. Apr., May. Dry soils, B. C. and 

 Ore. Int. to Eng. 1826. B.M. 3343. B.R. 15:1218. Gn. 

 53: 1175. -Hardy. 



7. ensata, Thunb. ( J. Uglumis, Vahl. J. oxypetala, 

 Bunge. I. fragrans, Until.). Sheaths large: Ivs. 1-3 ft. 

 long: pedicel 2-4 in., often longer than the spathe: 

 limb loose, bright blue or lilac: outer segments oblan- 

 ceolate, 2 in. long: blade shorter than the claw, veined 

 with dark blue, yellowish on the throat: inner segments 

 slender, erect, bright blue. Russia, Japan, Caucasus. 

 B.M. 2528 and 2331. B.R. 26:1. Gt. 1011. -Hardy. 

 Variable. 



Var. pabularia, Naudin (J. pabularia, Hort.). Said 

 to be distinct. Larger, with Ivs. purplish red near the 

 base. Used as a forage plant. Does well in driest 

 situations. Gt. 47:1452. Described by Wittmack, Gt. 47, 

 p. 369. The seeds should be sown in beds, and the 



young plants set out the following spring, 10 in. apart 

 each way, where they are to remain. 



8. Delavayi, Micheli. Lvs. 2-2% ft. long, often nearly 

 1 in. broad: stem 3-5 ft. high, bifurcate: spathe valves 

 green: outer segments reflexed from the middle, oblong, 

 obtuse or emarginate, brilliant violet, spotted with white 

 on the lower half; claw yellow, veined with lilac; inner 

 segments oblong-lanceolate, acute, erect, violet. Large 

 plants, with the flower-stalks erect, high above the Ivs 

 Thibet. R.H. 1895, p. 399. 



9. longipetala, Herb. Lvs. 1-1% ft. long : stem stout, 

 solid, compressed, 1^ ft. high : fls. bright lilac; outer 

 segments obovate, reflexinghalf way down; claw veined 

 with violet 011 a white ground. Calif. B.M. 5298. 



10. prismatica, Pursh (/. Virginica, Muhl. /. grdci- 

 lis, Bigel.). Plant tall, slender: Ivs. mostly shorter 

 than the stem, grass-like: stem 1-2 ft., simple or forked, 

 flexuous : spathes 1-2-fld. : pedicel long, exceeding the 

 spathe: outer segments l%-2 in. long; blade shorter 

 than the claw, bright lilac, yellow on the throat, marked 

 with purple and darker veins; inner segments erect, 

 bright lilac. May, June. Wet grounds, New Brunswick 

 to Pa. and N. Car. B.M. 1504. 



11. graminea, Linn. (/. Nikitensis, Lange). Lvs. 

 strongly ribbed, 1-1% ft. long : stem compressed, an- 

 gled, slender, solid: pedicel 1-1% in. long: limb bright 

 lilac, copiously veined; outer segments with an orbicu- 

 lar blade % in. broad and shorter than the broad claw; 

 claw dull yellow, veined with purple; inner segments 

 erect, nearly straight. May. Central and S. Eu. B.M. 

 681. Long cult.; mentioned by Lobel, Clusius and Ge- 

 rarde. Distinguished from I. Sibirica by its solid, angu- 

 lar stem. 



12. Sibirica, Linn. (/. acuta, Willd.). Compact, 

 tufted: Ivs. green, not rigid, 1-2 ft. long: stem slender, 

 terete, fistulose, much overtopping the Ivs., simple or 

 forked, bearing several clusters of fls. : limb bright li- 

 lac-blue; outer segments l%-2 in. long, with an orbicu- 

 lar blade gradually narrowed to a slender claw, veined 

 with bright violet, whitish toward the claw; inner seg- 

 ments shorter, erect. Central and S. Eu. and eastern 

 Siberia. Int. in 1796. B.M. 50. R.H. 1898, p. 23. -Com- 

 mon in cult. The plants form large, compact clumps, 

 producing many long flowering stems from the center. 

 Var. orientalis, Thunb. (/. sanguinea, Don. I. Sibir- 

 ica, var. sanguinea, Hort. /. hcematophylla, Fisch. 

 I. Sibirica. var. hcematophylla, Hort.). Fls. larger, 

 more fugitive; blade of the outer segments orbicular: 

 young Ivs. reddish. June. Produces a second crop 

 later. Var. alba, Hort., with pure white fls. Var. varie- 

 gata, Hort., with variegated Ivs. Var. acuta, Hort. 

 Narrow-lvd. 



13. unguicularis, Poir. (/. stylbsa, Desf.). Fig. 1172. 

 Lvs. about 6 in a tuft, finally l%-2 ft. long, bright 

 green : tube 5-6 in. long, filiform, exserted from the 

 spathe: limb bright lilac, rarely white; outer segments 

 2%-3 in. long, 1 in. broad, with a yellow keel, streaked 

 with lilac on a white ground at the throat ; inner seg- 

 ments oblong. Jan., Feb. Algeria. B.M. 5773. Gn. 

 24:398; 46:979; 49, p. 236; 50, p. 187. G.C. III. 25:85. 

 Not hardy, but useful for cutting in early winter. 

 Fragrant. Var. alba, Hort. White form; spring. Var. 

 superba, Hort. Bluish purple. Oct. and later. 



14. bracteata, S. Wats. Rudimentary Ivs. brown, 

 very rigid; produced Ivs. 1 to few, much exceeding the 

 stem, 1-2 ft. long, one side green, the other glaucous, 

 edge revolute : stem 1-headed, angled, 2-3 in. to 1 ft. 

 long, sheathed with bracts 2-4 in. long : tube short, 

 funnelform : outer segments 2-3 in. ; blade ovate, as 

 long as the claw, pale yellow, veined with bluish pur- 

 ple; inner segments shorter,erect, yellow; style branches 

 long, narrow. June. Discovered in 1884 by Thomas 

 Howell, in Ore. G.F. 1:43. Int. 1888. 



15. Missouriensis, Nutt. (J. Tolmieana, Herb.) Lvs. 

 pale green, finely ribbed, 1-1% ft. long: stem 1-2 ft. long, 

 usually exceeding the Ivs., bearing a single large leaf low 

 down: pedicel long: tube very short: limb bright lilac; 

 outer segments obovate, 1 in. broad, yellow near the 

 claw; inner segments oblong, straight, erect, Wet soil, 

 S. Dak. and Mont, to Ariz. Gn. 50: 1082. -Not common 

 in cult. Flowers early. 



