IRIS 



IRIS 



1669 



BBB. Outer scgjus. of the perianth without a beard or 

 cre^t, sometimes pubescent. 

 c. Infl. a regular raceme: seeds conspicuously 



winged Pabdanthopsis. Species 52 



cc. Infl. 7iot a regular raceme: seeds not conspicu- 

 ously winged Apogon. Species 53-85 



AA. Rootstock a bulb. 



B. Inner segms. of the perianth small, often minute, 



spreading or deflexed Juno. Species 86-98 



BB. Inner segms. of the perianth large, erect. 



c. Stamens not adhering to the style-branches. 



XiPHiuM. Species 99-109 



cc. Stamens adhering to the style-branches 



Gynandriris. Species 110 



SUBGENUS EVANSIA. 



A. St. none or very short, evidently exceeded 

 by the Ivs.: plants dwarf. 

 B. Perianth-tube very slender, exceed- 

 ing the bracts 1. cristata 



BB. Perianth-tube expanded above, not 



exceeding the bracts 2. lacustris 



AA. 5^ evident, equaling or exceeding the 

 Ivs.: plants large. 

 B. Pedicel much shorter than the 



spathe 3. tectorum 



BB. Pedicel about as long as the spathe 

 or only slightly shorter. 

 c. Lvs. thin, distinctly ribbed, both 



surfaces slightly glaucous 4. Milesii 



cc. Lvs. thick, smooth, trith a glossy 

 upper- and a glaucous under- 

 surface 5. japonica 



1. cristita, Soland. Plant dwarf: rhizome slender, 

 creeping: lvs. ensiform, thin, 4-8 in. long, green: st. 

 1-3 in. high, flattened, 1-headed, bearing 2-3 lvs. ; tube 

 slender, l}^-2 in. long; limb blue; outer segms. obo- 

 vate, 1-1} 2 in. long, crested; inner segms. shorter, 

 naked. April, May. Mountains of Ky., Va., and the 

 Carolinas. B.M. 412. Gn. 45, p. 127. L.B.C. 14: 

 1366. 



2. lacustris, Nutt. Similar to /. cristata in size and 

 foliage except that the lvs. are rather narrower and 

 sometimes wavy margined 



and the perianth-tube is "flfiibfirTirMlfariTrtJ^ft 



only J^^-1 in. long, shorter ^i^fftmammamamuaMmia 



than the spathe- valves: 



fls. blue; segms. expanded 



above: caps, ovoid, borne 



on a pedicel of about its own ^^iflKSKIRvWI 



length. Shores of Lakes ^K^^^r'Wlr'-TTW""f/ 



Huron, Michigan, and Su- "^(^J^Jm *- " *- '-'' 



p^™'"- "' art US 



3. tectorum, Maxim. (/. i tjl I'M 

 chinensis, Bunge. /. cris- j\ F; ji] 

 lata, Miq. /. fimbriata, | ;" ^jKW, / 

 Klatt).Fig. 1965. Lvs. 1ft. IJ/hM 

 long, ensiform, thin, strongly ' mnmi ' 

 ribbed : st. 1 ' 2 f t •> subterete: .' ' ImwH: 1 , 

 heads on long peduncles; i' I M 

 tube 1 in. long; limb bright \ \ ^S/Mmm j a 

 hlac; outer segms. 2 in. \x\ ' ^tiJK^llr / / // 

 long, obovate; claw half as '^ ^aU'Mr /lit ' 

 long as the blade, streaked ^m'tjUml 7 '/ 

 with violet, with a wavy III^JHwi 

 edge and a large, laciniate, W^ttfi 

 white and lilac crest running Wjlmwllt 

 up the claw and half up the ""/■ '■'1 

 blade; inner segms. spread- 

 ing, nearly as large, plain 1965. Iris tectorum. ( X VO 

 lilac, short-clawed. Sent to 



Eu. in 1872 by Dr. Hance. Cult, in China and Japan. 

 B.M. 6118. F.S.22:2282. Gt.716. Gn. 50:272. G.C. 

 in. 35:355; 44:142. J.H. IIL 44:146. G.L. 17:348. 

 Var. alba. Dykes (/. iedbrum var. cdndida, Hort.). Fls. 

 pure white, with few faint yellow veins at the base of 



the segms. Comes true from seed. Gt. 57: 1571. Gn. 

 70, p. 15. G.C. IIL 40:216. G.W. 10:525. 



4. MUesii, Foster. Lvs. 7-8 on the st., 2-3 ft. long 

 and 2-3 in. broad, thin, strongly ribbed: st. 2-3 ft. 

 high, branched, bearing 4-5 heads: fls. bright hlac, 

 lasting only a day; outer segms. oblong-cuneate, claret- 

 purple, whitish in the center, spotted and veined with 

 lilac, furnished with a deeply laciniated yellow crest; 

 inner segms. oblong, spreading; style-crests deeply 

 toothed. Himalayas. B.M. 6889. — Near /. tectorum, 

 but inferior. 



5. japonica, Thunb. (/. chinensis, Curt. /. fimbri- 

 ata, Vent.). Fig. 1966. Lvs. ensiform, thick, smooth, 

 1-1 '2 ft. long: St. slender, as long as the lvs., with a 

 raceme of hlac fls.: tube J4in. long; outer segms. 1-1}/^ 

 in. long, with crimped margins, yellow on the claw, 

 crested; inner segms. smaller. Winter. Japan and China. 

 B.M. 373. Gt. 511. Gn. 28:120; 77, p. 142. J.H. III. 

 31:185. A.G. 12:704. F.R. 2:149.— An evergreen 

 greenhouse plant except in Calif, where it does very 

 well outdoors in a shady border. 



SUBGENUS POGONIRIS. 



A. Plants dwarf: lvs. generally less than 9 

 in. long. 

 B. Tube of the perianth 1 in. or more 

 in length. 



c. St. obsolete or very short 6. pumila 



cc. St. present, 1-10 in. long. 



D. Spathe-valves not keeled or only 

 the outer one slightly keeled. 

 E. The st. almost entirely hidden 

 by clasping lvs. 

 F. The spathe-valves lanceo- 

 late, membranous, green. . 7. pseudo- 

 FF. The spathe-valves oblong, [pumila 



green or scarioits above. . . 8. biflora 

 EE. The sts. bare above, u"ith 1-2 



reduced lvs. below the center. 9. Chamaeiris 

 DD. Spathe-valves aaitely keeled. ... 10. Reichen- 



(See also I. imbrieata No. 22) [bachii 



BB. Tube of the perianth short or none. 

 c. Spathe-valves green or only partly 

 scarious. 

 D. Rhizome slender, stoloniferous: 



sheaths splitting into fibers. ... 11. flavissixna 

 DD. Rhizome more compact: sheaths 



not splitting into fibers 12. mandshurica 



cc. Spathe-valves scarious, even in the 



bud 13. Cengialti 



AA. Plants toll: lvs. generally more than 1 

 ft. long. 

 B. <S(. scarcely overtopping the lvs. 

 c. The st. branched below the mid- 

 dle 14. aphylla 



cc. The st. branched above the middle, 

 or unbranched. 

 D. Spathe-valves wholly green when 

 the first fls. open, often flushed 



with purple, inflated 15. variegata 



DD. Spathe-valves partly scarious 

 when the first fls. open. 



E. Fls. dull purple l(i. lurida 



EE. Fls. dark i^let 17. Kochii 



DDD. Spathe-valves entirely scarious 



at fioicering-time 18. atroviolacea 



BB. St. much overtopping the lvs. 



c. Spathe-valves entirely scarious at 

 flowering-time or even in the 

 bud. 



D. Fls. pale purple or lilac 19. pallida 



DD. Fls. white; segms. veined and 

 flushed with purple or lilac on 

 the margins. 



E. Sts. 2-S ft. high 20. plicata 



EE. Sts. 1-114 ft. high 21. Swertii 



cc. Spathe-valves green or partly 

 scarious. 



